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K3 Receive Attenuation with KPA500 in Operate

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Brian F. Wruble-2

K3 Receive Attenuation with KPA500 in Operate

Hi all:

I am running a newly assembled "K-Line" --- K3/100, KPA500 and KAT500. The
K3 is pretty "loaded" with KRX3, KAT3, KXV3A, etc.

I just noticed that received signals are down 4 S-units when the KPA500 is
in Operate. In Standby, signals pop right up.

Reading past reflector emails on the topic, I found one thread that
suggested this may have to do with the state of the KPA500 PTT. I found
that pulling the PTT RCA plug out ended the problem.

Then I replaced the PTT plug, and still had no problem. However, once I
actually transmitted, and the PTT acted to key the KPA500, the problem
recurred >>> Low sigs when the amp is in Operate, Full sigs when in Standby.

Has anyone figured out a fix for this?

73 de Brian W3BW

*Brian F. Wruble, C.F.A.

*70 is the new 40.*
*
Mail: 1107 Key Plaza, PMB 447 Key West, FL 33040-4077
Summers: P.O.Box 57, 7400 Augustine Herman Highway, Georgetown, MD 21930
eFax 305.768.0278
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Don Wilhelm-4

Re: K3 Receive Attenuation with KPA500 in Operate

Brian,

I have heard this before, and as I recall it has to do with the DB15
cable and the PTT cable when used together.

Are you using the PTT cable in addition to the cable from the K3 ACC
cable? If so, pin 10 of the cable should not be included. See the note
on page 8 of the KAT500 manual.

Normally you would not have to use the PTT cable with the K3. See pages
3 and 4 of the KAT500 manual. For this arrangement, piin 10 of the ACC
cable must be present.

If you have other devices that need access ti the K3 Key Out line, you
would use the PTT cable AND use the key line interrupter to disconnect
pin 10 from the DB15 Interface cable without the need for removing pin 10. .

73,
Don W3FPR

On 8/1/2013 4:30 PM, Brian F. Wruble wrote:

> Hi all:
>
> I am running a newly assembled "K-Line" --- K3/100, KPA500 and KAT500. The
> K3 is pretty "loaded" with KRX3, KAT3, KXV3A, etc.
>
> I just noticed that received signals are down 4 S-units when the KPA500 is
> in Operate. In Standby, signals pop right up.
>
> Reading past reflector emails on the topic, I found one thread that
> suggested this may have to do with the state of the KPA500 PTT. I found
> that pulling the PTT RCA plug out ended the problem.
>
> Then I replaced the PTT plug, and still had no problem. However, once I
> actually transmitted, and the PTT acted to key the KPA500, the problem
> recurred >>> Low sigs when the amp is in Operate, Full sigs when in Standby.
>
>

Brian F. Wruble-2

Re: K3 Receive Attenuation with KPA500 in Operate

Hi Don,

Thanks for the prompt response.

Yes, I am using the DB15 and the PTT line. I got it working. Here is my
new cable lineup:

1. ACC on K3 (DB15) >>> DB15 Y Cable | >>>DB15 Cable >>> "XCVR" (DB15) On
KAT500
|
And | >>> "ACC"
on Navigator Interface

2. "RS232" on K3 >>> "XCVR" (RS232) on P3

3. "PC" on P3 >>> "RS232" on Navigator Interface

4. "AMP" on KAT500 (DB15) >>> DB15 Cable >>> "AUX1" (DB15) on KPA500

5. NO PTT LINE into KPA500 or into KAT500

6. No "Key Line Interupter" anyplace.

With this lineup, is the KAT500 protected from the KPA500 keying when the
KAT500 is tuning?

I must admit, I have mightily confused myself in this process.

Thanks again,

Brian W3BW

*Brian F. Wruble, C.F.A.

*70 is the new 40.*
*
Mail: 1107 Key Plaza, PMB 447 Key West, FL 33040-4077
Summers: P.O.Box 57, 7400 Augustine Herman Highway, Georgetown, MD 21930
eFax 305.768.0278

On Thu, Aug 1, 2013 at 5:01 PM, Don Wilhelm <[hidden email]> wrote:

> Brian,
>
> I have heard this before, and as I recall it has to do with the DB15 cable
> and the PTT cable when used together.
>
> Are you using the PTT cable in addition to the cable from the K3 ACC
> cable? If so, pin 10 of the cable should not be included. See the note on
> page 8 of the KAT500 manual.
>
> Normally you would not have to use the PTT cable with the K3. See pages 3
> and 4 of the KAT500 manual. For this arrangement, piin 10 of the ACC cable
> must be present.
>
> If you have other devices that need access ti the K3 Key Out line, you
> would use the PTT cable AND use the key line interrupter to disconnect pin
> 10 from the DB15 Interface cable without the need for removing pin 10. .
>
> 73,
> Don W3FPR
>
>
> On 8/1/2013 4:30 PM, Brian F. Wruble wrote:
>
>> Hi all:
>>
>> I am running a newly assembled "K-Line" --- K3/100, KPA500 and KAT500.
>> The
>> K3 is pretty "loaded" with KRX3, KAT3, KXV3A, etc.
>>
>> I just noticed that received signals are down 4 S-units when the KPA500 is
>> in Operate. In Standby, signals pop right up.
>>
>> Reading past reflector emails on the topic, I found one thread that
>> suggested this may have to do with the state of the KPA500 PTT. I found
>> that pulling the PTT RCA plug out ended the problem.
>>
>> Then I replaced the PTT plug, and still had no problem. However, once I
>> actually transmitted, and the PTT acted to key the KPA500, the problem
>> recurred >>> Low sigs when the amp is in Operate, Full sigs when in
>> Standby.
>>
>>
>>
>

Cady, Fred

Re: K3 Receive Attenuation with KPA500 in Operate

Hi Brian,
Make sure you are using a KPAK3AUX cable somewhere between the K3 and the KPA500. It can be between the K3 and the KAT or the KAT and the KPA. You can use a full DE15HD cable other places but the KPAK3AUX cable needs to be in there somewhere.
Cheers,
Fred KE7X
"The Elecraft K3: Design, Configuration and Operation"
"The Elecraft KX3 - Going for the Summit"
(soon - "The Elecraft K-Line - KPA500 and KAT500")

-----Original Message-----
From: [hidden email] [mailto:[hidden email]] On Behalf Of Brian F. Wruble
Sent: Thursday, August 01, 2013 4:17 PM
To: [hidden email]
Cc: Elecraft Reflector
Subject: Re: [Elecraft] K3 Receive Attenuation with KPA500 in Operate

Hi Don,

Thanks for the prompt response.

Yes, I am using the DB15 and the PTT line. I got it working. Here is my new cable lineup:

1. ACC on K3 (DB15) >>> DB15 Y Cable | >>>DB15 Cable >>> "XCVR" (DB15) On KAT500
|
And | >>> "ACC"
on Navigator Interface

2. "RS232" on K3 >>> "XCVR" (RS232) on P3

3. "PC" on P3 >>> "RS232" on Navigator Interface

4. "AMP" on KAT500 (DB15) >>> DB15 Cable >>> "AUX1" (DB15) on KPA500

5. NO PTT LINE into KPA500 or into KAT500

6. No "Key Line Interupter" anyplace.

With this lineup, is the KAT500 protected from the KPA500 keying when the KAT500 is tuning?

I must admit, I have mightily confused myself in this process.

Thanks again,

Brian W3BW

*Brian F. Wruble, C.F.A.

*70 is the new 40.*
*
Mail: 1107 Key Plaza, PMB 447 Key West, FL 33040-4077
Summers: P.O.Box 57, 7400 Augustine Herman Highway, Georgetown, MD 21930 eFax 305.768.0278

On Thu, Aug 1, 2013 at 5:01 PM, Don Wilhelm <[hidden email]> wrote:

> Brian,
>
> I have heard this before, and as I recall it has to do with the DB15
> cable and the PTT cable when used together.
>
> Are you using the PTT cable in addition to the cable from the K3 ACC
> cable? If so, pin 10 of the cable should not be included. See the
> note on page 8 of the KAT500 manual.
>
> Normally you would not have to use the PTT cable with the K3. See
> pages 3 and 4 of the KAT500 manual. For this arrangement, piin 10 of
> the ACC cable must be present.
>
> If you have other devices that need access ti the K3 Key Out line, you
> would use the PTT cable AND use the key line interrupter to disconnect
> pin 10 from the DB15 Interface cable without the need for removing pin 10. .
>
> 73,
> Don W3FPR
>
>
> On 8/1/2013 4:30 PM, Brian F. Wruble wrote:
>
>> Hi all:
>>
>> I am running a newly assembled "K-Line" --- K3/100, KPA500 and KAT500.
>> The
>> K3 is pretty "loaded" with KRX3, KAT3, KXV3A, etc.
>>
>> I just noticed that received signals are down 4 S-units when the
>> KPA500 is in Operate. In Standby, signals pop right up.
>>
>> Reading past reflector emails on the topic, I found one thread that
>> suggested this may have to do with the state of the KPA500 PTT. I
>> found that pulling the PTT RCA plug out ended the problem.
>>
>> Then I replaced the PTT plug, and still had no problem. However,
>> once I actually transmitted, and the PTT acted to key the KPA500, the
>> problem recurred >>> Low sigs when the amp is in Operate, Full sigs
>> when in Standby.
>>
>>
>>
>

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

Don Wilhelm-4

Re: K3 Receive Attenuation with KPA500 in Operate

In reply to this post by Brian F. Wruble-2

Brian,

Yes, the KAT500 is protected. That is inherent in the K3 ACC (DB15)
cable going first to the KAT500 and then to the KPA500 There is a
Keyout-LP signal in the ACC cable to the KAT500 (and then onward to the
KPA500).
The KAT500 interrupts that signal (to the KPA500) when the KAT500 needs
to tune.
That Keyout-LP signal is what all the instructions about the DB15 pin 10
concern themselves with.

73,
Don W3FPR

On 8/1/2013 6:16 PM, Brian F. Wruble wrote:

> Hi Don,
>
> Thanks for the prompt response.
>
> Yes, I am using the DB15 and the PTT line. I got it working. Here is my
> new cable lineup:
>
>
>
>
> 1. ACC on K3 (DB15) >>> DB15 Y Cable | >>>DB15 Cable >>> "XCVR" (DB15) On
> KAT500
> |
> And | >>> "ACC"
> on Navigator Interface
>
>
> 2. "RS232" on K3 >>> "XCVR" (RS232) on P3
>
>
> 3. "PC" on P3 >>> "RS232" on Navigator Interface
>
>
> 4. "AMP" on KAT500 (DB15) >>> DB15 Cable >>> "AUX1" (DB15) on KPA500
>
> 5. NO PTT LINE into KPA500 or into KAT500
>
> 6. No "Key Line Interupter" anyplace.
>
>
> With this lineup, is the KAT500 protected from the KPA500 keying when the
> KAT500 is tuning?
>
> I must admit, I have mightily confused myself in this process.
>
> Thanks again,
>
> Brian W3BW
>

Brian F. Wruble-2

Re: K3 Receive Attenuation with KPA500 in Operate

In reply to this post by Cady, Fred

F
red, thanks. I am using that cable both places where my diagram says "DB15
Cable".

I guess I needed to have invested in only one.

Everything seems to work, and the tuner protection works as well. I proved
that by lowering K3 output power to 5 watts (just to be safe), allowing the
KPA500 to key and asking the KAT500 to re-tune. it refuses to do so. That
is the right result.

73,

Brian

*Brian F. Wruble, C.F.A.

*70 is the new 40.*
*
Mail: 1107 Key Plaza, PMB 447 Key West, FL 33040-4077
Summers: P.O.Box 57, 7400 Augustine Herman Highway, Georgetown, MD 21930
eFax 305.768.0278

On Thu, Aug 1, 2013 at 7:08 PM, Cady, Fred <[hidden email]> wrote:

> Hi Brian,
> Make sure you are using a KPAK3AUX cable somewhere between the K3 and the
> KPA500. It can be between the K3 and the KAT or the KAT and the KPA. You
> can use a full DE15HD cable other places but the KPAK3AUX cable needs to be
> in there somewhere.
> Cheers,
> Fred KE7X
> "The Elecraft K3: Design, Configuration and Operation"
> "The Elecraft KX3 - Going for the Summit"
> (soon - "The Elecraft K-Line - KPA500 and KAT500")
>
>
> -----Original Message-----
> From: [hidden email] [mailto:
> [hidden email]] On Behalf Of Brian F. Wruble
> Sent: Thursday, August 01, 2013 4:17 PM
> To: [hidden email]
> Cc: Elecraft Reflector
> Subject: Re: [Elecraft] K3 Receive Attenuation with KPA500 in Operate
>
> Hi Don,
>
> Thanks for the prompt response.
>
> Yes, I am using the DB15 and the PTT line. I got it working. Here is my
> new cable lineup:
>
>
>
>
> 1. ACC on K3 (DB15) >>> DB15 Y Cable | >>>DB15 Cable >>> "XCVR" (DB15) On
> KAT500
> |
> And | >>> "ACC"
> on Navigator Interface
>
>
> 2. "RS232" on K3 >>> "XCVR" (RS232) on P3
>
>
> 3. "PC" on P3 >>> "RS232" on Navigator Interface
>
>
> 4. "AMP" on KAT500 (DB15) >>> DB15 Cable >>> "AUX1" (DB15) on KPA500
>
> 5. NO PTT LINE into KPA500 or into KAT500
>
> 6. No "Key Line Interupter" anyplace.
>
>
> With this lineup, is the KAT500 protected from the KPA500 keying when the
> KAT500 is tuning?
>
> I must admit, I have mightily confused myself in this process.
>
> Thanks again,
>
> Brian W3BW
>
>
>
> *Brian F. Wruble, C.F.A.
>
> *70 is the new 40.*
> *
> Mail: 1107 Key Plaza, PMB 447 Key West, FL 33040-4077
> Summers: P.O.Box 57, 7400 Augustine Herman Highway, Georgetown, MD 21930
> eFax 305.768.0278
>
>
>
>
>
>
>
> On Thu, Aug 1, 2013 at 5:01 PM, Don Wilhelm <[hidden email]> wrote:
>
> > Brian,
> >
> > I have heard this before, and as I recall it has to do with the DB15
> > cable and the PTT cable when used together.
> >
> > Are you using the PTT cable in addition to the cable from the K3 ACC
> > cable? If so, pin 10 of the cable should not be included. See the
> > note on page 8 of the KAT500 manual.
> >
> > Normally you would not have to use the PTT cable with the K3. See
> > pages 3 and 4 of the KAT500 manual. For this arrangement, piin 10 of
> > the ACC cable must be present.
> >
> > If you have other devices that need access ti the K3 Key Out line, you
> > would use the PTT cable AND use the key line interrupter to disconnect
> > pin 10 from the DB15 Interface cable without the need for removing pin
> 10. .
> >
> > 73,
> > Don W3FPR
> >
> >
> > On 8/1/2013 4:30 PM, Brian F. Wruble wrote:
> >
> >> Hi all:
> >>
> >> I am running a newly assembled "K-Line" --- K3/100, KPA500 and KAT500.
> >> The
> >> K3 is pretty "loaded" with KRX3, KAT3, KXV3A, etc.
> >>
> >> I just noticed that received signals are down 4 S-units when the
> >> KPA500 is in Operate. In Standby, signals pop right up.
> >>
> >> Reading past reflector emails on the topic, I found one thread that
> >> suggested this may have to do with the state of the KPA500 PTT. I
> >> found that pulling the PTT RCA plug out ended the problem.
> >>
> >> Then I replaced the PTT plug, and still had no problem. However,
> >> once I actually transmitted, and the PTT acted to key the KPA500, the
> >> problem recurred >>> Low sigs when the amp is in Operate, Full sigs
> >> when in Standby.
> >>
> >>
> >>
> >
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>

Iain MacDonnell - N6ML-2

Re: K3 Receive Attenuation with KPA500 in Operate

Brian was referring to his "cable lineup" (quoted below).

Brian, you do need two HD15 cables.... The point that Fred was making
is that one of them needs to be the Elecraft KPAK3AUX, whilst the
other one could be a straight-through cable with all 15 pins
connected. The KPAK3AUX does not connect all 15 pins, and that's
important. There is no harm in using two KPAK3AUX's, and that is
actually the safest configuration (cables designed for VGA monitor use
will not necessarily work).

The KAT500 should tune when the KPA500 is in operate mode, though -
there is a specific configuration for that in the KAT500 Utility. On
the "Configuration" tab, click "Edit Configuration...", then in the
"Amplifier Key Interrupt Power" tab , click "Optimize for Elecraft
KPA500".

73,

~iain / N6ML

On Thu, Aug 1, 2013 at 6:48 PM, Ron D'Eau Claire <[hidden email]> wrote:

> Where do you see two DB15 cables in a diagram Brian?
>
> Ron AC7AC
>
> -----Original Message-----
> From: [hidden email]
> [mailto:[hidden email]] On Behalf Of Brian F. Wruble
> Sent: Thursday, August 01, 2013 4:57 PM
> To: Cady, Fred
> Cc: Elecraft Reflector
> Subject: Re: [Elecraft] K3 Receive Attenuation with KPA500 in Operate
>
> F
> red, thanks. I am using that cable both places where my diagram says "DB15
> Cable".
>
> I guess I needed to have invested in only one.
>
> Everything seems to work, and the tuner protection works as well. I proved
> that by lowering K3 output power to 5 watts (just to be safe), allowing the
> KPA500 to key and asking the KAT500 to re-tune. it refuses to do so. That
> is the right result.
>
> 73,
>
> Brian
>
>
>
> *Brian F. Wruble, C.F.A.
>
> *70 is the new 40.*
> *
> Mail: 1107 Key Plaza, PMB 447 Key West, FL 33040-4077
> Summers: P.O.Box 57, 7400 Augustine Herman Highway, Georgetown, MD 21930
> eFax 305.768.0278
>
>
>
>
>
>
>
> On Thu, Aug 1, 2013 at 7:08 PM, Cady, Fred <[hidden email]> wrote:
>
>> Hi Brian,
>> Make sure you are using a KPAK3AUX cable somewhere between the K3 and
>> the KPA500. It can be between the K3 and the KAT or the KAT and the
>> KPA. You can use a full DE15HD cable other places but the KPAK3AUX
>> cable needs to be in there somewhere.
>> Cheers,
>> Fred KE7X
>> "The Elecraft K3: Design, Configuration and Operation"
>> "The Elecraft KX3 - Going for the Summit"
>> (soon - "The Elecraft K-Line - KPA500 and KAT500")
>>
>>
>> -----Original Message-----
>> From: [hidden email] [mailto:
>> [hidden email]] On Behalf Of Brian F. Wruble
>> Sent: Thursday, August 01, 2013 4:17 PM
>> To: [hidden email]
>> Cc: Elecraft Reflector
>> Subject: Re: [Elecraft] K3 Receive Attenuation with KPA500 in Operate
>>
>> Hi Don,
>>
>> Thanks for the prompt response.
>>
>> Yes, I am using the DB15 and the PTT line. I got it working. Here is
>> my new cable lineup:
>>
>>
>>
>>
>> 1. ACC on K3 (DB15) >>> DB15 Y Cable | >>>DB15 Cable >>> "XCVR"
>> (DB15) On
>> KAT500
>> |
>> And | >>> "ACC"
>> on Navigator Interface
>>
>>
>> 2. "RS232" on K3 >>> "XCVR" (RS232) on P3
>>
>>
>> 3. "PC" on P3 >>> "RS232" on Navigator Interface
>>
>>
>> 4. "AMP" on KAT500 (DB15) >>> DB15 Cable >>> "AUX1" (DB15) on KPA500
>>
>> 5. NO PTT LINE into KPA500 or into KAT500
>>
>> 6. No "Key Line Interupter" anyplace.
>>
>>
>> With this lineup, is the KAT500 protected from the KPA500 keying when
>> the
>> KAT500 is tuning?
>>
>> I must admit, I have mightily confused myself in this process.
>>
>> Thanks again,
>>
>> Brian W3BW
>>
>>
>>
>> *Brian F. Wruble, C.F.A.
>>
>> *70 is the new 40.*
>> *
>> Mail: 1107 Key Plaza, PMB 447 Key West, FL 33040-4077
>> Summers: P.O.Box 57, 7400 Augustine Herman Highway, Georgetown, MD
>> 21930 eFax 305.768.0278
>>
>>
>>
>>
>>
>>
>>
>> On Thu, Aug 1, 2013 at 5:01 PM, Don Wilhelm <[hidden email]> wrote:
>>
>> > Brian,
>> >
>> > I have heard this before, and as I recall it has to do with the DB15
>> > cable and the PTT cable when used together.
>> >
>> > Are you using the PTT cable in addition to the cable from the K3 ACC
>> > cable? If so, pin 10 of the cable should not be included. See the
>> > note on page 8 of the KAT500 manual.
>> >
>> > Normally you would not have to use the PTT cable with the K3. See
>> > pages 3 and 4 of the KAT500 manual. For this arrangement, piin 10
>> > of the ACC cable must be present.
>> >
>> > If you have other devices that need access ti the K3 Key Out line,
>> > you would use the PTT cable AND use the key line interrupter to
>> > disconnect pin 10 from the DB15 Interface cable without the need for
>> > removing pin
>> 10. .
>> >
>> > 73,
>> > Don W3FPR
>> >
>> >
>> > On 8/1/2013 4:30 PM, Brian F. Wruble wrote:
>> >
>> >> Hi all:
>> >>
>> >> I am running a newly assembled "K-Line" --- K3/100, KPA500 and KAT500.
>> >> The
>> >> K3 is pretty "loaded" with KRX3, KAT3, KXV3A, etc.
>> >>
>> >> I just noticed that received signals are down 4 S-units when the
>> >> KPA500 is in Operate. In Standby, signals pop right up.
>> >>
>> >> Reading past reflector emails on the topic, I found one thread that
>> >> suggested this may have to do with the state of the KPA500 PTT. I
>> >> found that pulling the PTT RCA plug out ended the problem.
>> >>
>> >> Then I replaced the PTT plug, and still had no problem. However,
>> >> once I actually transmitted, and the PTT acted to key the KPA500,
>> >> the problem recurred >>> Low sigs when the amp is in Operate, Full
>> >> sigs when in Standby.
>> >>
>> >>
>> >>
>> >
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net Please help support this email
>> list: http://www.qsl.net/donate.html
>>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html

Brian F. Wruble-2

Re: K3 Receive Attenuation with KPA500 in Operate

In reply to this post by Brian F. Wruble-2

Figure 1, Page 4, KAT500 manual

*Brian F. Wruble, C.F.A.

*70 is the new 40.*
*
Mail: 1107 Key Plaza, PMB 447 Key West, FL 33040-4077
Summers: P.O.Box 57, 7400 Augustine Herman Highway, Georgetown, MD 21930
eFax 305.768.0278

On Thu, Aug 1, 2013 at 9:48 PM, Ron D'Eau Claire <[hidden email]> wrote:

> Where do you see two DB15 cables in a diagram Brian?
>
> Ron AC7AC
>
> -----Original Message-----
> From: [hidden email]
> [mailto:[hidden email]] On Behalf Of Brian F. Wruble
> Sent: Thursday, August 01, 2013 4:57 PM
> To: Cady, Fred
> Cc: Elecraft Reflector
> Subject: Re: [Elecraft] K3 Receive Attenuation with KPA500 in Operate
>
> F
> red, thanks. I am using that cable both places where my diagram says "DB15
> Cable".
>
> I guess I needed to have invested in only one.
>
> Everything seems to work, and the tuner protection works as well. I proved
> that by lowering K3 output power to 5 watts (just to be safe), allowing the
> KPA500 to key and asking the KAT500 to re-tune. it refuses to do so. That
> is the right result.
>
> 73,
>
> Brian
>
>
>
> *Brian F. Wruble, C.F.A.
>
> *70 is the new 40.*
> *
> Mail: 1107 Key Plaza, PMB 447 Key West, FL 33040-4077
> Summers: P.O.Box 57, 7400 Augustine Herman Highway, Georgetown, MD 21930
> eFax 305.768.0278
>
>
>
>
>
>
>
> On Thu, Aug 1, 2013 at 7:08 PM, Cady, Fred <[hidden email]> wrote:
>
> > Hi Brian,
> > Make sure you are using a KPAK3AUX cable somewhere between the K3 and
> > the KPA500. It can be between the K3 and the KAT or the KAT and the
> > KPA. You can use a full DE15HD cable other places but the KPAK3AUX
> > cable needs to be in there somewhere.
> > Cheers,
> > Fred KE7X
> > "The Elecraft K3: Design, Configuration and Operation"
> > "The Elecraft KX3 - Going for the Summit"
> > (soon - "The Elecraft K-Line - KPA500 and KAT500")
> >
> >
> > -----Original Message-----
> > From: [hidden email] [mailto:
> > [hidden email]] On Behalf Of Brian F. Wruble
> > Sent: Thursday, August 01, 2013 4:17 PM
> > To: [hidden email]
> > Cc: Elecraft Reflector
> > Subject: Re: [Elecraft] K3 Receive Attenuation with KPA500 in Operate
> >
> > Hi Don,
> >
> > Thanks for the prompt response.
> >
> > Yes, I am using the DB15 and the PTT line. I got it working. Here is
> > my new cable lineup:
> >
> >
> >
> >
> > 1. ACC on K3 (DB15) >>> DB15 Y Cable | >>>DB15 Cable >>> "XCVR"
> > (DB15) On
> > KAT500
> > |
> > And | >>>
> "ACC"
> > on Navigator Interface
> >
> >
> > 2. "RS232" on K3 >>> "XCVR" (RS232) on P3
> >
> >
> > 3. "PC" on P3 >>> "RS232" on Navigator Interface
> >
> >
> > 4. "AMP" on KAT500 (DB15) >>> DB15 Cable >>> "AUX1" (DB15) on KPA500
> >
> > 5. NO PTT LINE into KPA500 or into KAT500
> >
> > 6. No "Key Line Interupter" anyplace.
> >
> >
> > With this lineup, is the KAT500 protected from the KPA500 keying when
> > the
> > KAT500 is tuning?
> >
> > I must admit, I have mightily confused myself in this process.
> >
> > Thanks again,
> >
> > Brian W3BW
> >
> >
> >
> > *Brian F. Wruble, C.F.A.
> >
> > *70 is the new 40.*
> > *
> > Mail: 1107 Key Plaza, PMB 447 Key West, FL 33040-4077
> > Summers: P.O.Box 57, 7400 Augustine Herman Highway, Georgetown, MD
> > 21930 eFax 305.768.0278
> >
> >
> >
> >
> >
> >
> >
> > On Thu, Aug 1, 2013 at 5:01 PM, Don Wilhelm <[hidden email]>
> wrote:
> >
> > > Brian,
> > >
> > > I have heard this before, and as I recall it has to do with the DB15
> > > cable and the PTT cable when used together.
> > >
> > > Are you using the PTT cable in addition to the cable from the K3 ACC
> > > cable? If so, pin 10 of the cable should not be included. See the
> > > note on page 8 of the KAT500 manual.
> > >
> > > Normally you would not have to use the PTT cable with the K3. See
> > > pages 3 and 4 of the KAT500 manual. For this arrangement, piin 10
> > > of the ACC cable must be present.
> > >
> > > If you have other devices that need access ti the K3 Key Out line,
> > > you would use the PTT cable AND use the key line interrupter to
> > > disconnect pin 10 from the DB15 Interface cable without the need for
> > > removing pin
> > 10. .
> > >
> > > 73,
> > > Don W3FPR
> > >
> > >
> > > On 8/1/2013 4:30 PM, Brian F. Wruble wrote:
> > >
> > >> Hi all:
> > >>
> > >> I am running a newly assembled "K-Line" --- K3/100, KPA500 and KAT500.
> > >> The
> > >> K3 is pretty "loaded" with KRX3, KAT3, KXV3A, etc.
> > >>
> > >> I just noticed that received signals are down 4 S-units when the
> > >> KPA500 is in Operate. In Standby, signals pop right up.
> > >>
> > >> Reading past reflector emails on the topic, I found one thread that
> > >> suggested this may have to do with the state of the KPA500 PTT. I
> > >> found that pulling the PTT RCA plug out ended the problem.
> > >>
> > >> Then I replaced the PTT plug, and still had no problem. However,
> > >> once I actually transmitted, and the PTT acted to key the KPA500,
> > >> the problem recurred >>> Low sigs when the amp is in Operate, Full
> > >> sigs when in Standby.
> > >>
> > >>
> > >>
> > >
> > ______________________________________________________________
> > Elecraft mailing list
> > Home: http://mailman.qth.net/mailman/listinfo/elecraft
> > Help: http://mailman.qth.net/mmfaq.htm
> > Post: mailto:[hidden email]
> >
> > This list hosted by: http://www.qsl.net Please help support this email
> > list: http://www.qsl.net/donate.html
> >
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
>

Brian F. Wruble-2

Re: K3 Receive Attenuation with KPA500 in Operate

In reply to this post by Iain MacDonnell - N6ML-2

Got it. Thanks.

Figure 1 in the KAT500 manual leads one to believe that both cables need to
be KPAK3AUX, as both DB15 cables in the diagram are labeled "3", and one of
the cables has the warning not to use a standard VGA cable. The note, "3"
also suggests 2 of that particular Elecraft cable. An obvious conclusion
--- though wrong --- is that both need to be the same, and both could be
the special Elecraft (KPAK3AUX) cable or a modified VGA cable to be the
same as the KPAK3AUX..

My understanding on the tuner issue was that the KAT500 could be damaged by
going through a retune cycle at high power. Thus, some kind of safety
lockout is needed to prevent that. If I can configure the KAT500 to tune
when the KPA500 is in "operate" mode, how do I prevent that kind of damage
from occurring?

Brian

*Brian F. Wruble, C.F.A.

*70 is the new 40.*
*
Mail: 1107 Key Plaza, PMB 447 Key West, FL 33040-4077
Summers: P.O.Box 57, 7400 Augustine Herman Highway, Georgetown, MD 21930
eFax 305.768.0278

On Thu, Aug 1, 2013 at 10:00 PM, iain macdonnell - N6ML <[hidden email]>wrote:

> Brian was referring to his "cable lineup" (quoted below).
>
> Brian, you do need two HD15 cables.... The point that Fred was making
> is that one of them needs to be the Elecraft KPAK3AUX, whilst the
> other one could be a straight-through cable with all 15 pins
> connected. The KPAK3AUX does not connect all 15 pins, and that's
> important. There is no harm in using two KPAK3AUX's, and that is
> actually the safest configuration (cables designed for VGA monitor use
> will not necessarily work).
>
> The KAT500 should tune when the KPA500 is in operate mode, though -
> there is a specific configuration for that in the KAT500 Utility. On
> the "Configuration" tab, click "Edit Configuration...", then in the
> "Amplifier Key Interrupt Power" tab , click "Optimize for Elecraft
> KPA500".
>
> 73,
>
> ~iain / N6ML
>
>
>
> On Thu, Aug 1, 2013 at 6:48 PM, Ron D'Eau Claire <[hidden email]> wrote:
> > Where do you see two DB15 cables in a diagram Brian?
> >
> > Ron AC7AC
> >
> > -----Original Message-----
> > From: [hidden email]
> > [mailto:[hidden email]] On Behalf Of Brian F. Wruble
> > Sent: Thursday, August 01, 2013 4:57 PM
> > To: Cady, Fred
> > Cc: Elecraft Reflector
> > Subject: Re: [Elecraft] K3 Receive Attenuation with KPA500 in Operate
> >
> > F
> > red, thanks. I am using that cable both places where my diagram says
> "DB15
> > Cable".
> >
> > I guess I needed to have invested in only one.
> >
> > Everything seems to work, and the tuner protection works as well. I
> proved
> > that by lowering K3 output power to 5 watts (just to be safe), allowing
> the
> > KPA500 to key and asking the KAT500 to re-tune. it refuses to do so.
> That
> > is the right result.
> >
> > 73,
> >
> > Brian
> >
> >
> >
> > *Brian F. Wruble, C.F.A.
> >
> > *70 is the new 40.*
> > *
> > Mail: 1107 Key Plaza, PMB 447 Key West, FL 33040-4077
> > Summers: P.O.Box 57, 7400 Augustine Herman Highway, Georgetown, MD 21930
> > eFax 305.768.0278
> >
> >
> >
> >
> >
> >
> >
> > On Thu, Aug 1, 2013 at 7:08 PM, Cady, Fred <[hidden email]>
> wrote:
> >
> >> Hi Brian,
> >> Make sure you are using a KPAK3AUX cable somewhere between the K3 and
> >> the KPA500. It can be between the K3 and the KAT or the KAT and the
> >> KPA. You can use a full DE15HD cable other places but the KPAK3AUX
> >> cable needs to be in there somewhere.
> >> Cheers,
> >> Fred KE7X
> >> "The Elecraft K3: Design, Configuration and Operation"
> >> "The Elecraft KX3 - Going for the Summit"
> >> (soon - "The Elecraft K-Line - KPA500 and KAT500")
> >>
> >>
> >> -----Original Message-----
> >> From: [hidden email] [mailto:
> >> [hidden email]] On Behalf Of Brian F. Wruble
> >> Sent: Thursday, August 01, 2013 4:17 PM
> >> To: [hidden email]
> >> Cc: Elecraft Reflector
> >> Subject: Re: [Elecraft] K3 Receive Attenuation with KPA500 in Operate
> >>
> >> Hi Don,
> >>
> >> Thanks for the prompt response.
> >>
> >> Yes, I am using the DB15 and the PTT line. I got it working. Here is
> >> my new cable lineup:
> >>
> >>
> >>
> >>
> >> 1. ACC on K3 (DB15) >>> DB15 Y Cable | >>>DB15 Cable >>> "XCVR"
> >> (DB15) On
> >> KAT500
> >> |
> >> And | >>>
> "ACC"
> >> on Navigator Interface
> >>
> >>
> >> 2. "RS232" on K3 >>> "XCVR" (RS232) on P3
> >>
> >>
> >> 3. "PC" on P3 >>> "RS232" on Navigator Interface
> >>
> >>
> >> 4. "AMP" on KAT500 (DB15) >>> DB15 Cable >>> "AUX1" (DB15) on KPA500
> >>
> >> 5. NO PTT LINE into KPA500 or into KAT500
> >>
> >> 6. No "Key Line Interupter" anyplace.
> >>
> >>
> >> With this lineup, is the KAT500 protected from the KPA500 keying when
> >> the
> >> KAT500 is tuning?
> >>
> >> I must admit, I have mightily confused myself in this process.
> >>
> >> Thanks again,
> >>
> >> Brian W3BW
> >>
> >>
> >>
> >> *Brian F. Wruble, C.F.A.
> >>
> >> *70 is the new 40.*
> >> *
> >> Mail: 1107 Key Plaza, PMB 447 Key West, FL 33040-4077
> >> Summers: P.O.Box 57, 7400 Augustine Herman Highway, Georgetown, MD
> >> 21930 eFax 305.768.0278
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >> On Thu, Aug 1, 2013 at 5:01 PM, Don Wilhelm <[hidden email]>
> wrote:
> >>
> >> > Brian,
> >> >
> >> > I have heard this before, and as I recall it has to do with the DB15
> >> > cable and the PTT cable when used together.
> >> >
> >> > Are you using the PTT cable in addition to the cable from the K3 ACC
> >> > cable? If so, pin 10 of the cable should not be included. See the
> >> > note on page 8 of the KAT500 manual.
> >> >
> >> > Normally you would not have to use the PTT cable with the K3. See
> >> > pages 3 and 4 of the KAT500 manual. For this arrangement, piin 10
> >> > of the ACC cable must be present.
> >> >
> >> > If you have other devices that need access ti the K3 Key Out line,
> >> > you would use the PTT cable AND use the key line interrupter to
> >> > disconnect pin 10 from the DB15 Interface cable without the need for
> >> > removing pin
> >> 10. .
> >> >
> >> > 73,
> >> > Don W3FPR
> >> >
> >> >
> >> > On 8/1/2013 4:30 PM, Brian F. Wruble wrote:
> >> >
> >> >> Hi all:
> >> >>
> >> >> I am running a newly assembled "K-Line" --- K3/100, KPA500 and
> KAT500.
> >> >> The
> >> >> K3 is pretty "loaded" with KRX3, KAT3, KXV3A, etc.
> >> >>
> >> >> I just noticed that received signals are down 4 S-units when the
> >> >> KPA500 is in Operate. In Standby, signals pop right up.
> >> >>
> >> >> Reading past reflector emails on the topic, I found one thread that
> >> >> suggested this may have to do with the state of the KPA500 PTT. I
> >> >> found that pulling the PTT RCA plug out ended the problem.
> >> >>
> >> >> Then I replaced the PTT plug, and still had no problem. However,
> >> >> once I actually transmitted, and the PTT acted to key the KPA500,
> >> >> the problem recurred >>> Low sigs when the amp is in Operate, Full
> >> >> sigs when in Standby.
> >> >>
> >> >>
> >> >>
> >> >
> >> ______________________________________________________________
> >> Elecraft mailing list
> >> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> >> Help: http://mailman.qth.net/mmfaq.htm
> >> Post: mailto:[hidden email]
> >>
> >> This list hosted by: http://www.qsl.net Please help support this email
> >> list: http://www.qsl.net/donate.html
> >>
> > ______________________________________________________________
> > Elecraft mailing list
> > Home: http://mailman.qth.net/mailman/listinfo/elecraft
> > Help: http://mailman.qth.net/mmfaq.htm
> > Post: mailto:[hidden email]
> >
> > This list hosted by: http://www.qsl.net
> > Please help support this email list: http://www.qsl.net/donate.html
> >
> > ______________________________________________________________
> > Elecraft mailing list
> > Home: http://mailman.qth.net/mailman/listinfo/elecraft
> > Help: http://mailman.qth.net/mmfaq.htm
> > Post: mailto:[hidden email]
> >
> > This list hosted by: http://www.qsl.net
> > Please help support this email list: http://www.qsl.net/donate.html
>

Dick Dievendorff

Re: K3 Receive Attenuation with KPA500 in Operate

In reply to this post by Brian F. Wruble-2

Brian, please also visit the KAT500 Utility's "Edit Configuration" page and
check that you've clicked the button that says "Optimize for KPA500" if you
have a KPA500. With that info, the KAT500 can interrupt the KPA500's key
line whenever it needs to in order to tune.

73 de Dick, K6KR

-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of Brian F. Wruble
Sent: Thursday, August 01, 2013 16:57 PM
To: Cady, Fred
Cc: Elecraft Reflector
Subject: Re: [Elecraft] K3 Receive Attenuation with KPA500 in Operate

F
red, thanks. I am using that cable both places where my diagram says "DB15
Cable".

I guess I needed to have invested in only one.

Everything seems to work, and the tuner protection works as well. I proved
that by lowering K3 output power to 5 watts (just to be safe), allowing the
KPA500 to key and asking the KAT500 to re-tune. it refuses to do so. That
is the right result.

73,

Brian

*Brian F. Wruble, C.F.A.

*70 is the new 40.*
*
Mail: 1107 Key Plaza, PMB 447 Key West, FL 33040-4077
Summers: P.O.Box 57, 7400 Augustine Herman Highway, Georgetown, MD 21930
eFax 305.768.0278

On Thu, Aug 1, 2013 at 7:08 PM, Cady, Fred <[hidden email]> wrote:

> Hi Brian,
> Make sure you are using a KPAK3AUX cable somewhere between the K3 and
> the KPA500. It can be between the K3 and the KAT or the KAT and the
> KPA. You can use a full DE15HD cable other places but the KPAK3AUX
> cable needs to be in there somewhere.
> Cheers,
> Fred KE7X
> "The Elecraft K3: Design, Configuration and Operation"
> "The Elecraft KX3 - Going for the Summit"
> (soon - "The Elecraft K-Line - KPA500 and KAT500")
>
>
> -----Original Message-----
> From: [hidden email] [mailto:
> [hidden email]] On Behalf Of Brian F. Wruble
> Sent: Thursday, August 01, 2013 4:17 PM
> To: [hidden email]
> Cc: Elecraft Reflector
> Subject: Re: [Elecraft] K3 Receive Attenuation with KPA500 in Operate
>
> Hi Don,
>
> Thanks for the prompt response.
>
> Yes, I am using the DB15 and the PTT line. I got it working. Here is
> my new cable lineup:
>
>
>
>
> 1. ACC on K3 (DB15) >>> DB15 Y Cable | >>>DB15 Cable >>> "XCVR"
> (DB15) On
> KAT500
> |
> And | >>> "ACC"
> on Navigator Interface
>
>
> 2. "RS232" on K3 >>> "XCVR" (RS232) on P3
>
>
> 3. "PC" on P3 >>> "RS232" on Navigator Interface
>
>
> 4. "AMP" on KAT500 (DB15) >>> DB15 Cable >>> "AUX1" (DB15) on KPA500
>
> 5. NO PTT LINE into KPA500 or into KAT500
>
> 6. No "Key Line Interupter" anyplace.
>
>
> With this lineup, is the KAT500 protected from the KPA500 keying when
> the
> KAT500 is tuning?
>
> I must admit, I have mightily confused myself in this process.
>
> Thanks again,
>
> Brian W3BW
>
>
>
> *Brian F. Wruble, C.F.A.
>
> *70 is the new 40.*
> *
> Mail: 1107 Key Plaza, PMB 447 Key West, FL 33040-4077
> Summers: P.O.Box 57, 7400 Augustine Herman Highway, Georgetown, MD
> 21930 eFax 305.768.0278
>
>
>
>
>
>
>
> On Thu, Aug 1, 2013 at 5:01 PM, Don Wilhelm <[hidden email]> wrote:
>
> > Brian,
> >
> > I have heard this before, and as I recall it has to do with the DB15
> > cable and the PTT cable when used together.
> >
> > Are you using the PTT cable in addition to the cable from the K3 ACC
> > cable? If so, pin 10 of the cable should not be included. See the
> > note on page 8 of the KAT500 manual.
> >
> > Normally you would not have to use the PTT cable with the K3. See
> > pages 3 and 4 of the KAT500 manual. For this arrangement, piin 10
> > of the ACC cable must be present.
> >
> > If you have other devices that need access ti the K3 Key Out line,
> > you would use the PTT cable AND use the key line interrupter to
> > disconnect pin 10 from the DB15 Interface cable without the need for
> > removing pin
> 10. .
> >
> > 73,
> > Don W3FPR
> >
> >
> > On 8/1/2013 4:30 PM, Brian F. Wruble wrote:
> >
> >> Hi all:
> >>
> >> I am running a newly assembled "K-Line" --- K3/100, KPA500 and KAT500.
> >> The
> >> K3 is pretty "loaded" with KRX3, KAT3, KXV3A, etc.
> >>
> >> I just noticed that received signals are down 4 S-units when the
> >> KPA500 is in Operate. In Standby, signals pop right up.
> >>
> >> Reading past reflector emails on the topic, I found one thread that
> >> suggested this may have to do with the state of the KPA500 PTT. I
> >> found that pulling the PTT RCA plug out ended the problem.
> >>
> >> Then I replaced the PTT plug, and still had no problem. However,
> >> once I actually transmitted, and the PTT acted to key the KPA500,
> >> the problem recurred >>> Low sigs when the amp is in Operate, Full
> >> sigs when in Standby.
> >>
> >>
> >>
> >
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net Please help support this email
> list: http://www.qsl.net/donate.html
>

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

Iain MacDonnell - N6ML-2

Re: K3 Receive Attenuation with KPA500 in Operate

In reply to this post by Brian F. Wruble-2

Hi Brian,

When the KAT500 is tuning, it breaks the keying line (one of the pins
in the HD15 connector) going to the KPA500, so the amp will be unkeyed
during tuning, and then keyed again when tuning completes. Some amps
cannot handle keying being interrupted while they are making power
(known as "hot-switching"), so the KAT500 is setup by default to not
interrupt keying if it detects a high power level, but the KPA500 does
not have that problem, so you can reconfigure the kAT500 using the
utility as described.

73,

~iain / N6ML

On Thu, Aug 1, 2013 at 7:12 PM, Brian F. Wruble <[hidden email]> wrote:

> Got it. Thanks.
>
> Figure 1 in the KAT500 manual leads one to believe that both cables need to
> be KPAK3AUX, as both DB15 cables in the diagram are labeled "3", and one of
> the cables has the warning not to use a standard VGA cable. The note, "3"
> also suggests 2 of that particular Elecraft cable. An obvious conclusion
> --- though wrong --- is that both need to be the same, and both could be the
> special Elecraft (KPAK3AUX) cable or a modified VGA cable to be the same as
> the KPAK3AUX..
>
> My understanding on the tuner issue was that the KAT500 could be damaged by
> going through a retune cycle at high power. Thus, some kind of safety
> lockout is needed to prevent that. If I can configure the KAT500 to tune
> when the KPA500 is in "operate" mode, how do I prevent that kind of damage
> from occurring?
>
> Brian
>
>
>
> *Brian F. Wruble, C.F.A.
>
> 70 is the new 40.
>
> *
> Mail: 1107 Key Plaza, PMB 447 Key West, FL 33040-4077
> Summers: P.O.Box 57, 7400 Augustine Herman Highway, Georgetown, MD 21930
> eFax 305.768.0278
>
>
>
>
>
>
>
> On Thu, Aug 1, 2013 at 10:00 PM, iain macdonnell - N6ML <[hidden email]>
> wrote:
>>
>> Brian was referring to his "cable lineup" (quoted below).
>>
>> Brian, you do need two HD15 cables.... The point that Fred was making
>> is that one of them needs to be the Elecraft KPAK3AUX, whilst the
>> other one could be a straight-through cable with all 15 pins
>> connected. The KPAK3AUX does not connect all 15 pins, and that's
>> important. There is no harm in using two KPAK3AUX's, and that is
>> actually the safest configuration (cables designed for VGA monitor use
>> will not necessarily work).
>>
>> The KAT500 should tune when the KPA500 is in operate mode, though -
>> there is a specific configuration for that in the KAT500 Utility. On
>> the "Configuration" tab, click "Edit Configuration...", then in the
>> "Amplifier Key Interrupt Power" tab , click "Optimize for Elecraft
>> KPA500".
>>
>> 73,
>>
>> ~iain / N6ML
>>
>>
>>
>> On Thu, Aug 1, 2013 at 6:48 PM, Ron D'Eau Claire <[hidden email]> wrote:
>> > Where do you see two DB15 cables in a diagram Brian?
>> >
>> > Ron AC7AC
>> >
>> > -----Original Message-----
>> > From: [hidden email]
>> > [mailto:[hidden email]] On Behalf Of Brian F. Wruble
>> > Sent: Thursday, August 01, 2013 4:57 PM
>> > To: Cady, Fred
>> > Cc: Elecraft Reflector
>> > Subject: Re: [Elecraft] K3 Receive Attenuation with KPA500 in Operate
>> >
>> > F
>> > red, thanks. I am using that cable both places where my diagram says
>> > "DB15
>> > Cable".
>> >
>> > I guess I needed to have invested in only one.
>> >
>> > Everything seems to work, and the tuner protection works as well. I
>> > proved
>> > that by lowering K3 output power to 5 watts (just to be safe), allowing
>> > the
>> > KPA500 to key and asking the KAT500 to re-tune. it refuses to do so.
>> > That
>> > is the right result.
>> >
>> > 73,
>> >
>> > Brian
>> >
>> >
>> >
>> > *Brian F. Wruble, C.F.A.
>> >
>> > *70 is the new 40.*
>> > *
>> > Mail: 1107 Key Plaza, PMB 447 Key West, FL 33040-4077
>> > Summers: P.O.Box 57, 7400 Augustine Herman Highway, Georgetown, MD 21930
>> > eFax 305.768.0278
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> > On Thu, Aug 1, 2013 at 7:08 PM, Cady, Fred <[hidden email]>
>> > wrote:
>> >
>> >> Hi Brian,
>> >> Make sure you are using a KPAK3AUX cable somewhere between the K3 and
>> >> the KPA500. It can be between the K3 and the KAT or the KAT and the
>> >> KPA. You can use a full DE15HD cable other places but the KPAK3AUX
>> >> cable needs to be in there somewhere.
>> >> Cheers,
>> >> Fred KE7X
>> >> "The Elecraft K3: Design, Configuration and Operation"
>> >> "The Elecraft KX3 - Going for the Summit"
>> >> (soon - "The Elecraft K-Line - KPA500 and KAT500")
>> >>
>> >>
>> >> -----Original Message-----
>> >> From: [hidden email] [mailto:
>> >> [hidden email]] On Behalf Of Brian F. Wruble
>> >> Sent: Thursday, August 01, 2013 4:17 PM
>> >> To: [hidden email]
>> >> Cc: Elecraft Reflector
>> >> Subject: Re: [Elecraft] K3 Receive Attenuation with KPA500 in Operate
>> >>
>> >> Hi Don,
>> >>
>> >> Thanks for the prompt response.
>> >>
>> >> Yes, I am using the DB15 and the PTT line. I got it working. Here is
>> >> my new cable lineup:
>> >>
>> >>
>> >>
>> >>
>> >> 1. ACC on K3 (DB15) >>> DB15 Y Cable | >>>DB15 Cable >>> "XCVR"
>> >> (DB15) On
>> >> KAT500
>> >> |
>> >> And | >>>
>> >> "ACC"
>> >> on Navigator Interface
>> >>
>> >>
>> >> 2. "RS232" on K3 >>> "XCVR" (RS232) on P3
>> >>
>> >>
>> >> 3. "PC" on P3 >>> "RS232" on Navigator Interface
>> >>
>> >>
>> >> 4. "AMP" on KAT500 (DB15) >>> DB15 Cable >>> "AUX1" (DB15) on KPA500
>> >>
>> >> 5. NO PTT LINE into KPA500 or into KAT500
>> >>
>> >> 6. No "Key Line Interupter" anyplace.
>> >>
>> >>
>> >> With this lineup, is the KAT500 protected from the KPA500 keying when
>> >> the
>> >> KAT500 is tuning?
>> >>
>> >> I must admit, I have mightily confused myself in this process.
>> >>
>> >> Thanks again,
>> >>
>> >> Brian W3BW
>> >>
>> >>
>> >>
>> >> *Brian F. Wruble, C.F.A.
>> >>
>> >> *70 is the new 40.*
>> >> *
>> >> Mail: 1107 Key Plaza, PMB 447 Key West, FL 33040-4077
>> >> Summers: P.O.Box 57, 7400 Augustine Herman Highway, Georgetown, MD
>> >> 21930 eFax 305.768.0278
>> >>
>> >>
>> >>
>> >>
>> >>
>> >>
>> >>
>> >> On Thu, Aug 1, 2013 at 5:01 PM, Don Wilhelm <[hidden email]>
>> >> wrote:
>> >>
>> >> > Brian,
>> >> >
>> >> > I have heard this before, and as I recall it has to do with the DB15
>> >> > cable and the PTT cable when used together.
>> >> >
>> >> > Are you using the PTT cable in addition to the cable from the K3 ACC
>> >> > cable? If so, pin 10 of the cable should not be included. See the
>> >> > note on page 8 of the KAT500 manual.
>> >> >
>> >> > Normally you would not have to use the PTT cable with the K3. See
>> >> > pages 3 and 4 of the KAT500 manual. For this arrangement, piin 10
>> >> > of the ACC cable must be present.
>> >> >
>> >> > If you have other devices that need access ti the K3 Key Out line,
>> >> > you would use the PTT cable AND use the key line interrupter to
>> >> > disconnect pin 10 from the DB15 Interface cable without the need for
>> >> > removing pin
>> >> 10. .
>> >> >
>> >> > 73,
>> >> > Don W3FPR
>> >> >
>> >> >
>> >> > On 8/1/2013 4:30 PM, Brian F. Wruble wrote:
>> >> >
>> >> >> Hi all:
>> >> >>
>> >> >> I am running a newly assembled "K-Line" --- K3/100, KPA500 and
>> >> >> KAT500.
>> >> >> The
>> >> >> K3 is pretty "loaded" with KRX3, KAT3, KXV3A, etc.
>> >> >>
>> >> >> I just noticed that received signals are down 4 S-units when the
>> >> >> KPA500 is in Operate. In Standby, signals pop right up.
>> >> >>
>> >> >> Reading past reflector emails on the topic, I found one thread that
>> >> >> suggested this may have to do with the state of the KPA500 PTT. I
>> >> >> found that pulling the PTT RCA plug out ended the problem.
>> >> >>
>> >> >> Then I replaced the PTT plug, and still had no problem. However,
>> >> >> once I actually transmitted, and the PTT acted to key the KPA500,
>> >> >> the problem recurred >>> Low sigs when the amp is in Operate, Full
>> >> >> sigs when in Standby.
>> >> >>
>> >> >>
>> >> >>
>> >> >
>> >> ______________________________________________________________
>> >> Elecraft mailing list
>> >> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> >> Help: http://mailman.qth.net/mmfaq.htm
>> >> Post: mailto:[hidden email]
>> >>
>> >> This list hosted by: http://www.qsl.net Please help support this email
>> >> list: http://www.qsl.net/donate.html
>> >>
>> > ______________________________________________________________
>> > Elecraft mailing list
>> > Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> > Help: http://mailman.qth.net/mmfaq.htm
>> > Post: mailto:[hidden email]
>> >
>> > This list hosted by: http://www.qsl.net
>> > Please help support this email list: http://www.qsl.net/donate.html
>> >
>> > ______________________________________________________________
>> > Elecraft mailing list
>> > Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> > Help: http://mailman.qth.net/mmfaq.htm
>> > Post: mailto:[hidden email]
>> >
>> > This list hosted by: http://www.qsl.net
>> > Please help support this email list: http://www.qsl.net/donate.html
>
>

Dick Dievendorff

Re: K3 Receive Attenuation with KPA500 in Operate

In reply to this post by Brian F. Wruble-2

The KAT500 needs to be able to interrupt the KPA500 key line in order to
tune with exciter power. One 15-pin cable runs from the K3 to the KAT500,
and another runs from the KAT500 to the KPA500. This diagram is in the
KAT500 owner's manual.

73 de Dick, K6KR

-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of Brian F. Wruble
Sent: Thursday, August 01, 2013 19:13 PM
To: iain macdonnell - N6ML
Cc: Elecraft Reflector
Subject: Re: [Elecraft] K3 Receive Attenuation with KPA500 in Operate

Got it. Thanks.

Figure 1 in the KAT500 manual leads one to believe that both cables need to
be KPAK3AUX, as both DB15 cables in the diagram are labeled "3", and one of
the cables has the warning not to use a standard VGA cable. The note, "3"
also suggests 2 of that particular Elecraft cable. An obvious conclusion
--- though wrong --- is that both need to be the same, and both could be the
special Elecraft (KPAK3AUX) cable or a modified VGA cable to be the same as
the KPAK3AUX..

My understanding on the tuner issue was that the KAT500 could be damaged by
going through a retune cycle at high power. Thus, some kind of safety
lockout is needed to prevent that. If I can configure the KAT500 to tune
when the KPA500 is in "operate" mode, how do I prevent that kind of damage
from occurring?

Brian

*Brian F. Wruble, C.F.A.

*70 is the new 40.*
*
Mail: 1107 Key Plaza, PMB 447 Key West, FL 33040-4077
Summers: P.O.Box 57, 7400 Augustine Herman Highway, Georgetown, MD 21930
eFax 305.768.0278

On Thu, Aug 1, 2013 at 10:00 PM, iain macdonnell - N6ML
<[hidden email]>wrote:

> Brian was referring to his "cable lineup" (quoted below).
>
> Brian, you do need two HD15 cables.... The point that Fred was making
> is that one of them needs to be the Elecraft KPAK3AUX, whilst the
> other one could be a straight-through cable with all 15 pins
> connected. The KPAK3AUX does not connect all 15 pins, and that's
> important. There is no harm in using two KPAK3AUX's, and that is
> actually the safest configuration (cables designed for VGA monitor use
> will not necessarily work).
>
> The KAT500 should tune when the KPA500 is in operate mode, though -
> there is a specific configuration for that in the KAT500 Utility. On
> the "Configuration" tab, click "Edit Configuration...", then in the
> "Amplifier Key Interrupt Power" tab , click "Optimize for Elecraft
> KPA500".
>
> 73,
>
> ~iain / N6ML
>
>
>
> On Thu, Aug 1, 2013 at 6:48 PM, Ron D'Eau Claire <[hidden email]> wrote:
> > Where do you see two DB15 cables in a diagram Brian?
> >
> > Ron AC7AC
> >
> > -----Original Message-----
> > From: [hidden email]
> > [mailto:[hidden email]] On Behalf Of Brian F.
> > Wruble
> > Sent: Thursday, August 01, 2013 4:57 PM
> > To: Cady, Fred
> > Cc: Elecraft Reflector
> > Subject: Re: [Elecraft] K3 Receive Attenuation with KPA500 in
> > Operate
> >
> > F
> > red, thanks. I am using that cable both places where my diagram
> > says
> "DB15
> > Cable".
> >
> > I guess I needed to have invested in only one.
> >
> > Everything seems to work, and the tuner protection works as well. I
> proved
> > that by lowering K3 output power to 5 watts (just to be safe),
> > allowing
> the
> > KPA500 to key and asking the KAT500 to re-tune. it refuses to do so.
> That
> > is the right result.
> >
> > 73,
> >
> > Brian
> >
> >
> >
> > *Brian F. Wruble, C.F.A.
> >
> > *70 is the new 40.*
> > *
> > Mail: 1107 Key Plaza, PMB 447 Key West, FL 33040-4077
> > Summers: P.O.Box 57, 7400 Augustine Herman Highway, Georgetown, MD
> > 21930 eFax 305.768.0278
> >
> >
> >
> >
> >
> >
> >
> > On Thu, Aug 1, 2013 at 7:08 PM, Cady, Fred <[hidden email]>
> wrote:
> >
> >> Hi Brian,
> >> Make sure you are using a KPAK3AUX cable somewhere between the K3
> >> and the KPA500. It can be between the K3 and the KAT or the KAT and
> >> the KPA. You can use a full DE15HD cable other places but the
> >> KPAK3AUX cable needs to be in there somewhere.
> >> Cheers,
> >> Fred KE7X
> >> "The Elecraft K3: Design, Configuration and Operation"
> >> "The Elecraft KX3 - Going for the Summit"
> >> (soon - "The Elecraft K-Line - KPA500 and KAT500")
> >>
> >>
> >> -----Original Message-----
> >> From: [hidden email] [mailto:
> >> [hidden email]] On Behalf Of Brian F. Wruble
> >> Sent: Thursday, August 01, 2013 4:17 PM
> >> To: [hidden email]
> >> Cc: Elecraft Reflector
> >> Subject: Re: [Elecraft] K3 Receive Attenuation with KPA500 in
> >> Operate
> >>
> >> Hi Don,
> >>
> >> Thanks for the prompt response.
> >>
> >> Yes, I am using the DB15 and the PTT line. I got it working. Here
> >> is my new cable lineup:
> >>
> >>
> >>
> >>
> >> 1. ACC on K3 (DB15) >>> DB15 Y Cable | >>>DB15 Cable >>> "XCVR"
> >> (DB15) On
> >> KAT500
> >> |
> >> And | >>>
> "ACC"
> >> on Navigator Interface
> >>
> >>
> >> 2. "RS232" on K3 >>> "XCVR" (RS232) on P3
> >>
> >>
> >> 3. "PC" on P3 >>> "RS232" on Navigator Interface
> >>
> >>
> >> 4. "AMP" on KAT500 (DB15) >>> DB15 Cable >>> "AUX1" (DB15) on
> >> KPA500
> >>
> >> 5. NO PTT LINE into KPA500 or into KAT500
> >>
> >> 6. No "Key Line Interupter" anyplace.
> >>
> >>
> >> With this lineup, is the KAT500 protected from the KPA500 keying
> >> when the
> >> KAT500 is tuning?
> >>
> >> I must admit, I have mightily confused myself in this process.
> >>
> >> Thanks again,
> >>
> >> Brian W3BW
> >>
> >>
> >>
> >> *Brian F. Wruble, C.F.A.
> >>
> >> *70 is the new 40.*
> >> *
> >> Mail: 1107 Key Plaza, PMB 447 Key West, FL 33040-4077
> >> Summers: P.O.Box 57, 7400 Augustine Herman Highway, Georgetown, MD
> >> 21930 eFax 305.768.0278
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >> On Thu, Aug 1, 2013 at 5:01 PM, Don Wilhelm <[hidden email]>
> wrote:
> >>
> >> > Brian,
> >> >
> >> > I have heard this before, and as I recall it has to do with the
> >> > DB15 cable and the PTT cable when used together.
> >> >
> >> > Are you using the PTT cable in addition to the cable from the K3
> >> > ACC cable? If so, pin 10 of the cable should not be included.
> >> > See the note on page 8 of the KAT500 manual.
> >> >
> >> > Normally you would not have to use the PTT cable with the K3.
> >> > See pages 3 and 4 of the KAT500 manual. For this arrangement,
> >> > piin 10 of the ACC cable must be present.
> >> >
> >> > If you have other devices that need access ti the K3 Key Out
> >> > line, you would use the PTT cable AND use the key line
> >> > interrupter to disconnect pin 10 from the DB15 Interface cable
> >> > without the need for removing pin
> >> 10. .
> >> >
> >> > 73,
> >> > Don W3FPR
> >> >
> >> >
> >> > On 8/1/2013 4:30 PM, Brian F. Wruble wrote:
> >> >
> >> >> Hi all:
> >> >>
> >> >> I am running a newly assembled "K-Line" --- K3/100, KPA500 and
> KAT500.
> >> >> The
> >> >> K3 is pretty "loaded" with KRX3, KAT3, KXV3A, etc.
> >> >>
> >> >> I just noticed that received signals are down 4 S-units when the
> >> >> KPA500 is in Operate. In Standby, signals pop right up.
> >> >>
> >> >> Reading past reflector emails on the topic, I found one thread
> >> >> that suggested this may have to do with the state of the KPA500
> >> >> PTT. I found that pulling the PTT RCA plug out ended the problem.
> >> >>
> >> >> Then I replaced the PTT plug, and still had no problem.
> >> >> However, once I actually transmitted, and the PTT acted to key
> >> >> the KPA500, the problem recurred >>> Low sigs when the amp is in
> >> >> Operate, Full sigs when in Standby.
> >> >>
> >> >>
> >> >>
> >> >
> >> ______________________________________________________________
> >> Elecraft mailing list
> >> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> >> Help: http://mailman.qth.net/mmfaq.htm
> >> Post: mailto:[hidden email]
> >>
> >> This list hosted by: http://www.qsl.net Please help support this
> >> email
> >> list: http://www.qsl.net/donate.html
> >>
> > ______________________________________________________________
> > Elecraft mailing list
> > Home: http://mailman.qth.net/mailman/listinfo/elecraft
> > Help: http://mailman.qth.net/mmfaq.htm
> > Post: mailto:[hidden email]
> >
> > This list hosted by: http://www.qsl.net Please help support this
> > email list: http://www.qsl.net/donate.html
> >
> > ______________________________________________________________
> > Elecraft mailing list
> > Home: http://mailman.qth.net/mailman/listinfo/elecraft
> > Help: http://mailman.qth.net/mmfaq.htm
> > Post: mailto:[hidden email]
> >
> > This list hosted by: http://www.qsl.net Please help support this
> > email list: http://www.qsl.net/donate.html
>

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

Cady, Fred

Re: K3 Receive Attenuation with KPA500 in Operate

In reply to this post by Brian F. Wruble-2

Pin 10, in the K3 ACC is the Key Out line that goes first to the KAT500 in the KPAK3AUX cable and then on to the KPA in the second DB15 cable. When the KAT institutes a tune cycle, it opens that line so it is interrupted from going onto the KPA. Thus the amp won't be keyed and putting out power when the KAT is tuning. The Amplifier key Interrupt power configuration in the KAT is there because in some amplifiers (somebody may be using the KAT with a brand X amp) you cannot interrupt the amp's keying line at more than a certain power output without damaging the amp. So the KAT is delivered with that interrupt power set at 29 watts (I think). If the power coming into the KAT is more than that when the KAT wants to tune, it won't open the keying line to save damaging the amp but that, of course, could damage the KAT. So, because the KPA can be operating at full power out and won't suffer any damage by opening its keying line, you should configure the KAT as Ian says to optimize i
t for the KPA500.

Cheers,
Fred KE7X

Fred Cady
fcady at ieee dot org

> -----Original Message-----
> From: [hidden email] [mailto:elecraft-
> [hidden email]] On Behalf Of Brian F. Wruble
> Sent: Thursday, August 01, 2013 8:13 PM
> To: iain macdonnell - N6ML
> Cc: Elecraft Reflector
> Subject: Re: [Elecraft] K3 Receive Attenuation with KPA500 in Operate
>
> Got it. Thanks.
>
> Figure 1 in the KAT500 manual leads one to believe that both cables
> need to
> be KPAK3AUX, as both DB15 cables in the diagram are labeled "3", and
> one of
> the cables has the warning not to use a standard VGA cable. The note,
> "3"
> also suggests 2 of that particular Elecraft cable. An obvious
> conclusion
> --- though wrong --- is that both need to be the same, and both could
> be
> the special Elecraft (KPAK3AUX) cable or a modified VGA cable to be the
> same as the KPAK3AUX..
>
> My understanding on the tuner issue was that the KAT500 could be
> damaged by
> going through a retune cycle at high power. Thus, some kind of safety
> lockout is needed to prevent that. If I can configure the KAT500 to
> tune
> when the KPA500 is in "operate" mode, how do I prevent that kind of
> damage
> from occurring?
>
> Brian
>
>
>
> *Brian F. Wruble, C.F.A.
>
> *70 is the new 40.*
> *
> Mail: 1107 Key Plaza, PMB 447 Key West, FL 33040-4077
> Summers: P.O.Box 57, 7400 Augustine Herman Highway, Georgetown, MD
> 21930
> eFax 305.768.0278
>
>
>
>
>
>
>
> On Thu, Aug 1, 2013 at 10:00 PM, iain macdonnell - N6ML
> <[hidden email]>wrote:
>
> > Brian was referring to his "cable lineup" (quoted below).
> >
> > Brian, you do need two HD15 cables.... The point that Fred was making
> > is that one of them needs to be the Elecraft KPAK3AUX, whilst the
> > other one could be a straight-through cable with all 15 pins
> > connected. The KPAK3AUX does not connect all 15 pins, and that's
> > important. There is no harm in using two KPAK3AUX's, and that is
> > actually the safest configuration (cables designed for VGA monitor
> use
> > will not necessarily work).
> >
> > The KAT500 should tune when the KPA500 is in operate mode, though -
> > there is a specific configuration for that in the KAT500 Utility. On
> > the "Configuration" tab, click "Edit Configuration...", then in the
> > "Amplifier Key Interrupt Power" tab , click "Optimize for Elecraft
> > KPA500".
> >
> > 73,
> >
> > ~iain / N6ML
> >
> >
> >
> > On Thu, Aug 1, 2013 at 6:48 PM, Ron D'Eau Claire <[hidden email]>
> wrote:
> > > Where do you see two DB15 cables in a diagram Brian?
> > >
> > > Ron AC7AC
> > >
> > > -----Original Message-----
> > > From: [hidden email]
> > > [mailto:[hidden email]] On Behalf Of Brian F.
> Wruble
> > > Sent: Thursday, August 01, 2013 4:57 PM
> > > To: Cady, Fred
> > > Cc: Elecraft Reflector
> > > Subject: Re: [Elecraft] K3 Receive Attenuation with KPA500 in
> Operate
> > >
> > > F
> > > red, thanks. I am using that cable both places where my diagram
> says
> > "DB15
> > > Cable".
> > >
> > > I guess I needed to have invested in only one.
> > >
> > > Everything seems to work, and the tuner protection works as well.
> I
> > proved
> > > that by lowering K3 output power to 5 watts (just to be safe),
> allowing
> > the
> > > KPA500 to key and asking the KAT500 to re-tune. it refuses to do
> so.
> > That
> > > is the right result.
> > >
> > > 73,
> > >
> > > Brian
> > >
> > >
> > >
> > > *Brian F. Wruble, C.F.A.
> > >
> > > *70 is the new 40.*
> > > *
> > > Mail: 1107 Key Plaza, PMB 447 Key West, FL 33040-4077
> > > Summers: P.O.Box 57, 7400 Augustine Herman Highway, Georgetown, MD
> 21930
> > > eFax 305.768.0278
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > On Thu, Aug 1, 2013 at 7:08 PM, Cady, Fred <[hidden email]>
> > wrote:
> > >
> > >> Hi Brian,
> > >> Make sure you are using a KPAK3AUX cable somewhere between the K3
> and
> > >> the KPA500. It can be between the K3 and the KAT or the KAT and
> the
> > >> KPA. You can use a full DE15HD cable other places but the
> KPAK3AUX
> > >> cable needs to be in there somewhere.
> > >> Cheers,
> > >> Fred KE7X
> > >> "The Elecraft K3: Design, Configuration and Operation"
> > >> "The Elecraft KX3 - Going for the Summit"
> > >> (soon - "The Elecraft K-Line - KPA500 and KAT500")
> > >>
> > >>
> > >> -----Original Message-----
> > >> From: [hidden email] [mailto:
> > >> [hidden email]] On Behalf Of Brian F. Wruble
> > >> Sent: Thursday, August 01, 2013 4:17 PM
> > >> To: [hidden email]
> > >> Cc: Elecraft Reflector
> > >> Subject: Re: [Elecraft] K3 Receive Attenuation with KPA500 in
> Operate
> > >>
> > >> Hi Don,
> > >>
> > >> Thanks for the prompt response.
> > >>
> > >> Yes, I am using the DB15 and the PTT line. I got it working.
> Here is
> > >> my new cable lineup:
> > >>
> > >>
> > >>
> > >>
> > >> 1. ACC on K3 (DB15) >>> DB15 Y Cable | >>>DB15 Cable >>> "XCVR"
> > >> (DB15) On
> > >> KAT500
> > >>
> |
> > >> And |
> >>>
> > "ACC"
> > >> on Navigator Interface
> > >>
> > >>
> > >> 2. "RS232" on K3 >>> "XCVR" (RS232) on P3
> > >>
> > >>
> > >> 3. "PC" on P3 >>> "RS232" on Navigator Interface
> > >>
> > >>
> > >> 4. "AMP" on KAT500 (DB15) >>> DB15 Cable >>> "AUX1" (DB15) on
> KPA500
> > >>
> > >> 5. NO PTT LINE into KPA500 or into KAT500
> > >>
> > >> 6. No "Key Line Interupter" anyplace.
> > >>
> > >>
> > >> With this lineup, is the KAT500 protected from the KPA500 keying
> when
> > >> the
> > >> KAT500 is tuning?
> > >>
> > >> I must admit, I have mightily confused myself in this process.
> > >>
> > >> Thanks again,
> > >>
> > >> Brian W3BW
> > >>
> > >>
> > >>
> > >> *Brian F. Wruble, C.F.A.
> > >>
> > >> *70 is the new 40.*
> > >> *
> > >> Mail: 1107 Key Plaza, PMB 447 Key West, FL 33040-4077
> > >> Summers: P.O.Box 57, 7400 Augustine Herman Highway, Georgetown, MD
> > >> 21930 eFax 305.768.0278
> > >>
> > >>
> > >>
> > >>
> > >>
> > >>
> > >>
> > >> On Thu, Aug 1, 2013 at 5:01 PM, Don Wilhelm <[hidden email]>
> > wrote:
> > >>
> > >> > Brian,
> > >> >
> > >> > I have heard this before, and as I recall it has to do with the
> DB15
> > >> > cable and the PTT cable when used together.
> > >> >
> > >> > Are you using the PTT cable in addition to the cable from the K3
> ACC
> > >> > cable? If so, pin 10 of the cable should not be included. See
> the
> > >> > note on page 8 of the KAT500 manual.
> > >> >
> > >> > Normally you would not have to use the PTT cable with the K3.
> See
> > >> > pages 3 and 4 of the KAT500 manual. For this arrangement, piin
> 10
> > >> > of the ACC cable must be present.
> > >> >
> > >> > If you have other devices that need access ti the K3 Key Out
> line,
> > >> > you would use the PTT cable AND use the key line interrupter to
> > >> > disconnect pin 10 from the DB15 Interface cable without the need
> for
> > >> > removing pin
> > >> 10. .
> > >> >
> > >> > 73,
> > >> > Don W3FPR
> > >> >
> > >> >
> > >> > On 8/1/2013 4:30 PM, Brian F. Wruble wrote:
> > >> >
> > >> >> Hi all:
> > >> >>
> > >> >> I am running a newly assembled "K-Line" --- K3/100, KPA500 and
> > KAT500.
> > >> >> The
> > >> >> K3 is pretty "loaded" with KRX3, KAT3, KXV3A, etc.
> > >> >>
> > >> >> I just noticed that received signals are down 4 S-units when
> the
> > >> >> KPA500 is in Operate. In Standby, signals pop right up.
> > >> >>
> > >> >> Reading past reflector emails on the topic, I found one thread
> that
> > >> >> suggested this may have to do with the state of the KPA500 PTT.
> I
> > >> >> found that pulling the PTT RCA plug out ended the problem.
> > >> >>
> > >> >> Then I replaced the PTT plug, and still had no problem.
> However,
> > >> >> once I actually transmitted, and the PTT acted to key the
> KPA500,
> > >> >> the problem recurred >>> Low sigs when the amp is in Operate,
> Full
> > >> >> sigs when in Standby.
> > >> >>
> > >> >>
> > >> >>
> > >> >
> > >> ______________________________________________________________
> > >> Elecraft mailing list
> > >> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> > >> Help: http://mailman.qth.net/mmfaq.htm
> > >> Post: mailto:[hidden email]
> > >>
> > >> This list hosted by: http://www.qsl.net Please help support this
> email
> > >> list: http://www.qsl.net/donate.html
> > >>
> > > ______________________________________________________________
> > > Elecraft mailing list
> > > Home: http://mailman.qth.net/mailman/listinfo/elecraft
> > > Help: http://mailman.qth.net/mmfaq.htm
> > > Post: mailto:[hidden email]
> > >
> > > This list hosted by: http://www.qsl.net
> > > Please help support this email list: http://www.qsl.net/donate.html
> > >
> > > ______________________________________________________________
> > > Elecraft mailing list
> > > Home: http://mailman.qth.net/mailman/listinfo/elecraft
> > > Help: http://mailman.qth.net/mmfaq.htm
> > > Post: mailto:[hidden email]
> > >
> > > This list hosted by: http://www.qsl.net
> > > Please help support this email list: http://www.qsl.net/donate.html
> >
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html

Iain MacDonnell - N6ML-2

Re: K3 Receive Attenuation with KPA500 in Operate

In reply to this post by Iain MacDonnell - N6ML-2

That's not what the KPA500 manual says :-

"Elecraft K3 Cable Connections

This is available direct from Elecraft (pg 16): order KPAK3AUX . Pins
not shown have no connection."

The table shows only 10 pins.

Elsewhere in the KPA500 manual, it is stated that pin 7 must not be
connected to the K3.

I don't have a KPAK3AUX cable to test, as I made my own custom cables.

73,

~iain / N6ML

On Thu, Aug 1, 2013 at 7:51 PM, Ron D'Eau Claire <[hidden email]> wrote:

> The KPA3AUX cable DOES connect all 15 pins, Ian. It is simply a
> straight-through cable, unlike a common VGA cable.
>
> If you want to use a separate PTT line (e.g. to route through some other
> equipment that needs to control the amp, such as a Stepp-IR controller) you
> need to use the Key Line Interrupter shown in Figure 2 that opens the PTT
> line in the DB15 cable.
>
> 73 Ron AC7AC
>
>
> -----Original Message-----
> From: [hidden email] [mailto:[hidden email]] On Behalf Of iain
> macdonnell - N6ML
> Sent: Thursday, August 01, 2013 7:01 PM
> To: Ron D'Eau Claire
> Cc: [hidden email]; Elecraft Reflector
> Subject: Re: [Elecraft] K3 Receive Attenuation with KPA500 in Operate
>
> Brian was referring to his "cable lineup" (quoted below).
>
> Brian, you do need two HD15 cables.... The point that Fred was making is
> that one of them needs to be the Elecraft KPAK3AUX, whilst the other one
> could be a straight-through cable with all 15 pins connected. The KPAK3AUX
> does not connect all 15 pins, and that's important. There is no harm in
> using two KPAK3AUX's, and that is actually the safest configuration (cables
> designed for VGA monitor use will not necessarily work).
>
> The KAT500 should tune when the KPA500 is in operate mode, though - there is
> a specific configuration for that in the KAT500 Utility. On the
> "Configuration" tab, click "Edit Configuration...", then in the "Amplifier
> Key Interrupt Power" tab , click "Optimize for Elecraft KPA500".
>
> 73,
>
> ~iain / N6ML
>
>
>
> On Thu, Aug 1, 2013 at 6:48 PM, Ron D'Eau Claire <[hidden email]> wrote:
>> Where do you see two DB15 cables in a diagram Brian?
>>
>> Ron AC7AC
>>
>> -----Original Message-----
>> From: [hidden email]
>> [mailto:[hidden email]] On Behalf Of Brian F. Wruble
>> Sent: Thursday, August 01, 2013 4:57 PM
>> To: Cady, Fred
>> Cc: Elecraft Reflector
>> Subject: Re: [Elecraft] K3 Receive Attenuation with KPA500 in Operate
>>
>> F
>> red, thanks. I am using that cable both places where my diagram says
>> "DB15 Cable".
>>
>> I guess I needed to have invested in only one.
>>
>> Everything seems to work, and the tuner protection works as well. I
>> proved that by lowering K3 output power to 5 watts (just to be safe),
>> allowing the
>> KPA500 to key and asking the KAT500 to re-tune. it refuses to do so.
>> That is the right result.
>>
>> 73,
>>
>> Brian
>>
>>
>>
>> *Brian F. Wruble, C.F.A.
>>
>> *70 is the new 40.*
>> *
>> Mail: 1107 Key Plaza, PMB 447 Key West, FL 33040-4077
>> Summers: P.O.Box 57, 7400 Augustine Herman Highway, Georgetown, MD
>> 21930 eFax 305.768.0278
>>
>>
>>
>>
>>
>>
>>
>> On Thu, Aug 1, 2013 at 7:08 PM, Cady, Fred <[hidden email]> wrote:
>>
>>> Hi Brian,
>>> Make sure you are using a KPAK3AUX cable somewhere between the K3 and
>>> the KPA500. It can be between the K3 and the KAT or the KAT and the
>>> KPA. You can use a full DE15HD cable other places but the KPAK3AUX
>>> cable needs to be in there somewhere.
>>> Cheers,
>>> Fred KE7X
>>> "The Elecraft K3: Design, Configuration and Operation"
>>> "The Elecraft KX3 - Going for the Summit"
>>> (soon - "The Elecraft K-Line - KPA500 and KAT500")
>>>
>>>
>>> -----Original Message-----
>>> From: [hidden email] [mailto:
>>> [hidden email]] On Behalf Of Brian F. Wruble
>>> Sent: Thursday, August 01, 2013 4:17 PM
>>> To: [hidden email]
>>> Cc: Elecraft Reflector
>>> Subject: Re: [Elecraft] K3 Receive Attenuation with KPA500 in Operate
>>>
>>> Hi Don,
>>>
>>> Thanks for the prompt response.
>>>
>>> Yes, I am using the DB15 and the PTT line. I got it working. Here
>>> is my new cable lineup:
>>>
>>>
>>>
>>>
>>> 1. ACC on K3 (DB15) >>> DB15 Y Cable | >>>DB15 Cable >>> "XCVR"
>>> (DB15) On
>>> KAT500
>>> |
>>> And | >>>
> "ACC"
>>> on Navigator Interface
>>>
>>>
>>> 2. "RS232" on K3 >>> "XCVR" (RS232) on P3
>>>
>>>
>>> 3. "PC" on P3 >>> "RS232" on Navigator Interface
>>>
>>>
>>> 4. "AMP" on KAT500 (DB15) >>> DB15 Cable >>> "AUX1" (DB15) on KPA500
>>>
>>> 5. NO PTT LINE into KPA500 or into KAT500
>>>
>>> 6. No "Key Line Interupter" anyplace.
>>>
>>>
>>> With this lineup, is the KAT500 protected from the KPA500 keying when
>>> the
>>> KAT500 is tuning?
>>>
>>> I must admit, I have mightily confused myself in this process.
>>>
>>> Thanks again,
>>>
>>> Brian W3BW
>>>
>>>
>>>
>>> *Brian F. Wruble, C.F.A.
>>>
>>> *70 is the new 40.*
>>> *
>>> Mail: 1107 Key Plaza, PMB 447 Key West, FL 33040-4077
>>> Summers: P.O.Box 57, 7400 Augustine Herman Highway, Georgetown, MD
>>> 21930 eFax 305.768.0278
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>> On Thu, Aug 1, 2013 at 5:01 PM, Don Wilhelm <[hidden email]> wrote:
>>>
>>> > Brian,
>>> >
>>> > I have heard this before, and as I recall it has to do with the
>>> > DB15 cable and the PTT cable when used together.
>>> >
>>> > Are you using the PTT cable in addition to the cable from the K3
>>> > ACC cable? If so, pin 10 of the cable should not be included. See
>>> > the note on page 8 of the KAT500 manual.
>>> >
>>> > Normally you would not have to use the PTT cable with the K3. See
>>> > pages 3 and 4 of the KAT500 manual. For this arrangement, piin 10
>>> > of the ACC cable must be present.
>>> >
>>> > If you have other devices that need access ti the K3 Key Out line,
>>> > you would use the PTT cable AND use the key line interrupter to
>>> > disconnect pin 10 from the DB15 Interface cable without the need
>>> > for removing pin
>>> 10. .
>>> >
>>> > 73,
>>> > Don W3FPR
>>> >
>>> >
>>> > On 8/1/2013 4:30 PM, Brian F. Wruble wrote:
>>> >
>>> >> Hi all:
>>> >>
>>> >> I am running a newly assembled "K-Line" --- K3/100, KPA500 and KAT500.
>>> >> The
>>> >> K3 is pretty "loaded" with KRX3, KAT3, KXV3A, etc.
>>> >>
>>> >> I just noticed that received signals are down 4 S-units when the
>>> >> KPA500 is in Operate. In Standby, signals pop right up.
>>> >>
>>> >> Reading past reflector emails on the topic, I found one thread
>>> >> that suggested this may have to do with the state of the KPA500
>>> >> PTT. I found that pulling the PTT RCA plug out ended the problem.
>>> >>
>>> >> Then I replaced the PTT plug, and still had no problem. However,
>>> >> once I actually transmitted, and the PTT acted to key the KPA500,
>>> >> the problem recurred >>> Low sigs when the amp is in Operate, Full
>>> >> sigs when in Standby.
>>> >>
>>> >>
>>> >>
>>> >
>>> ______________________________________________________________
>>> Elecraft mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:[hidden email]
>>>
>>> This list hosted by: http://www.qsl.net Please help support this
>>> email
>>> list: http://www.qsl.net/donate.html
>>>
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net Please help support this email
>> list: http://www.qsl.net/donate.html
>>
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net Please help support this email
>> list: http://www.qsl.net/donate.html
>

Cady, Fred

Re: K3 Receive Attenuation with KPA500 in Operate

You may both be right! I haven't checked my KPAK3AUX cable for actual wires but I bet there are 15 wires because I know that the pins not to be connected are snipped off in the DE15HD plug-end of the cable.

-----Original Message-----
From: [hidden email] [mailto:[hidden email]] On Behalf Of iain macdonnell - N6ML
Sent: Thursday, August 01, 2013 10:00 PM
To: Ron D'Eau Claire
Cc: Elecraft Reflector
Subject: Re: [Elecraft] K3 Receive Attenuation with KPA500 in Operate

That's not what the KPA500 manual says :-

"Elecraft K3 Cable Connections

This is available direct from Elecraft (pg 16): order KPAK3AUX . Pins not shown have no connection."

The table shows only 10 pins.

Elsewhere in the KPA500 manual, it is stated that pin 7 must not be connected to the K3.

I don't have a KPAK3AUX cable to test, as I made my own custom cables.

73,

~iain / N6ML

On Thu, Aug 1, 2013 at 7:51 PM, Ron D'Eau Claire <[hidden email]> wrote:

> The KPA3AUX cable DOES connect all 15 pins, Ian. It is simply a
> straight-through cable, unlike a common VGA cable.
>
> If you want to use a separate PTT line (e.g. to route through some
> other equipment that needs to control the amp, such as a Stepp-IR
> controller) you need to use the Key Line Interrupter shown in Figure 2
> that opens the PTT line in the DB15 cable.
>
> 73 Ron AC7AC
>
>
> -----Original Message-----
> From: [hidden email] [mailto:[hidden email]] On Behalf Of iain
> macdonnell - N6ML
> Sent: Thursday, August 01, 2013 7:01 PM
> To: Ron D'Eau Claire
> Cc: [hidden email]; Elecraft Reflector
> Subject: Re: [Elecraft] K3 Receive Attenuation with KPA500 in Operate
>
> Brian was referring to his "cable lineup" (quoted below).
>
> Brian, you do need two HD15 cables.... The point that Fred was making
> is that one of them needs to be the Elecraft KPAK3AUX, whilst the
> other one could be a straight-through cable with all 15 pins
> connected. The KPAK3AUX does not connect all 15 pins, and that's
> important. There is no harm in using two KPAK3AUX's, and that is
> actually the safest configuration (cables designed for VGA monitor use will not necessarily work).
>
> The KAT500 should tune when the KPA500 is in operate mode, though -
> there is a specific configuration for that in the KAT500 Utility. On
> the "Configuration" tab, click "Edit Configuration...", then in the
> "Amplifier Key Interrupt Power" tab , click "Optimize for Elecraft KPA500".
>
> 73,
>
> ~iain / N6ML
>
>
>
> On Thu, Aug 1, 2013 at 6:48 PM, Ron D'Eau Claire <[hidden email]> wrote:
>> Where do you see two DB15 cables in a diagram Brian?
>>
>> Ron AC7AC
>>
>> -----Original Message-----
>> From: [hidden email]
>> [mailto:[hidden email]] On Behalf Of Brian F.
>> Wruble
>> Sent: Thursday, August 01, 2013 4:57 PM
>> To: Cady, Fred
>> Cc: Elecraft Reflector
>> Subject: Re: [Elecraft] K3 Receive Attenuation with KPA500 in Operate
>>
>> F
>> red, thanks. I am using that cable both places where my diagram says
>> "DB15 Cable".
>>
>> I guess I needed to have invested in only one.
>>
>> Everything seems to work, and the tuner protection works as well. I
>> proved that by lowering K3 output power to 5 watts (just to be safe),
>> allowing the KPA500 to key and asking the KAT500 to re-tune. it
>> refuses to do so.
>> That is the right result.
>>
>> 73,
>>
>> Brian
>>
>>
>>
>> *Brian F. Wruble, C.F.A.
>>
>> *70 is the new 40.*
>> *
>> Mail: 1107 Key Plaza, PMB 447 Key West, FL 33040-4077
>> Summers: P.O.Box 57, 7400 Augustine Herman Highway, Georgetown, MD
>> 21930 eFax 305.768.0278
>>
>>
>>
>>
>>
>>
>>
>> On Thu, Aug 1, 2013 at 7:08 PM, Cady, Fred <[hidden email]> wrote:
>>
>>> Hi Brian,
>>> Make sure you are using a KPAK3AUX cable somewhere between the K3
>>> and the KPA500. It can be between the K3 and the KAT or the KAT and
>>> the KPA. You can use a full DE15HD cable other places but the
>>> KPAK3AUX cable needs to be in there somewhere.
>>> Cheers,
>>> Fred KE7X
>>> "The Elecraft K3: Design, Configuration and Operation"
>>> "The Elecraft KX3 - Going for the Summit"
>>> (soon - "The Elecraft K-Line - KPA500 and KAT500")
>>>
>>>
>>> -----Original Message-----
>>> From: [hidden email] [mailto:
>>> [hidden email]] On Behalf Of Brian F. Wruble
>>> Sent: Thursday, August 01, 2013 4:17 PM
>>> To: [hidden email]
>>> Cc: Elecraft Reflector
>>> Subject: Re: [Elecraft] K3 Receive Attenuation with KPA500 in
>>> Operate
>>>
>>> Hi Don,
>>>
>>> Thanks for the prompt response.
>>>
>>> Yes, I am using the DB15 and the PTT line. I got it working. Here
>>> is my new cable lineup:
>>>
>>>
>>>
>>>
>>> 1. ACC on K3 (DB15) >>> DB15 Y Cable | >>>DB15 Cable >>> "XCVR"
>>> (DB15) On
>>> KAT500
>>> |
>>> And | >>>
> "ACC"
>>> on Navigator Interface
>>>
>>>
>>> 2. "RS232" on K3 >>> "XCVR" (RS232) on P3
>>>
>>>
>>> 3. "PC" on P3 >>> "RS232" on Navigator Interface
>>>
>>>
>>> 4. "AMP" on KAT500 (DB15) >>> DB15 Cable >>> "AUX1" (DB15) on
>>> KPA500
>>>
>>> 5. NO PTT LINE into KPA500 or into KAT500
>>>
>>> 6. No "Key Line Interupter" anyplace.
>>>
>>>
>>> With this lineup, is the KAT500 protected from the KPA500 keying
>>> when the KAT500 is tuning?
>>>
>>> I must admit, I have mightily confused myself in this process.
>>>
>>> Thanks again,
>>>
>>> Brian W3BW
>>>
>>>
>>>
>>> *Brian F. Wruble, C.F.A.
>>>
>>> *70 is the new 40.*
>>> *
>>> Mail: 1107 Key Plaza, PMB 447 Key West, FL 33040-4077
>>> Summers: P.O.Box 57, 7400 Augustine Herman Highway, Georgetown, MD
>>> 21930 eFax 305.768.0278
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>> On Thu, Aug 1, 2013 at 5:01 PM, Don Wilhelm <[hidden email]> wrote:
>>>
>>> > Brian,
>>> >
>>> > I have heard this before, and as I recall it has to do with the
>>> > DB15 cable and the PTT cable when used together.
>>> >
>>> > Are you using the PTT cable in addition to the cable from the K3
>>> > ACC cable? If so, pin 10 of the cable should not be included.
>>> > See the note on page 8 of the KAT500 manual.
>>> >
>>> > Normally you would not have to use the PTT cable with the K3. See
>>> > pages 3 and 4 of the KAT500 manual. For this arrangement, piin 10
>>> > of the ACC cable must be present.
>>> >
>>> > If you have other devices that need access ti the K3 Key Out line,
>>> > you would use the PTT cable AND use the key line interrupter to
>>> > disconnect pin 10 from the DB15 Interface cable without the need
>>> > for removing pin
>>> 10. .
>>> >
>>> > 73,
>>> > Don W3FPR
>>> >
>>> >
>>> > On 8/1/2013 4:30 PM, Brian F. Wruble wrote:
>>> >
>>> >> Hi all:
>>> >>
>>> >> I am running a newly assembled "K-Line" --- K3/100, KPA500 and KAT500.
>>> >> The
>>> >> K3 is pretty "loaded" with KRX3, KAT3, KXV3A, etc.
>>> >>
>>> >> I just noticed that received signals are down 4 S-units when the
>>> >> KPA500 is in Operate. In Standby, signals pop right up.
>>> >>
>>> >> Reading past reflector emails on the topic, I found one thread
>>> >> that suggested this may have to do with the state of the KPA500
>>> >> PTT. I found that pulling the PTT RCA plug out ended the problem.
>>> >>
>>> >> Then I replaced the PTT plug, and still had no problem. However,
>>> >> once I actually transmitted, and the PTT acted to key the KPA500,
>>> >> the problem recurred >>> Low sigs when the amp is in Operate,
>>> >> Full sigs when in Standby.
>>> >>
>>> >>
>>> >>
>>> >
>>> ______________________________________________________________
>>> Elecraft mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:[hidden email]
>>>
>>> This list hosted by: http://www.qsl.net Please help support this
>>> email
>>> list: http://www.qsl.net/donate.html
>>>
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net Please help support this
>> email
>> list: http://www.qsl.net/donate.html
>>
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net Please help support this
>> email
>> list: http://www.qsl.net/donate.html
>