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KPA500...standby vs. operate

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Macy monkeys

KPA500...standby vs. operate

I am in and out of the shack all day with various nets and ragchews. Is there any advantage to putting the amp into standby between QSOs...or should I just leave it in operate?

John K7FD
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Don Wilhelm

Re: KPA500...standby vs. operate

John,

I do not think there is any harm in leaving it in operate. If you are
really "pinching pennies" on the electric bill, you might find a small
advantage to switching it to standby.

73,
Don W3FPR

On 10/27/2019 12:36 PM, Macy monkeys wrote:
> I am in and out of the shack all day with various nets and ragchews. Is there any advantage to putting the amp into standby between QSOs...or should I just leave it in operate?
>
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Ken Winterling

Re: KPA500...standby vs. operate

In reply to this post by Macy monkeys

I would check the block diagram and/or the schematic to be sure but I think the standby/operate switch only disables/enables the PTT/keying line. Ken WA2LBI LG G6 ------ Original message------From: Don WilhelmDate: Sun, Oct 27, 2019 13:00To: Macy monkeys;[hidden email];Cc: Subject:Re: [Elecraft] KPA500...standby vs. operateJohn,

I do not think there is any harm in leaving it in operate. If you are
really "pinching pennies" on the electric bill, you might find a small
advantage to switching it to standby.

73,
Don W3FPR

On 10/27/2019 12:36 PM, Macy monkeys wrote:
> I am in and out of the shack all day with various nets and ragchews. Is there any advantage to putting the amp into standby between QSOs...or should I just leave it in operate?
>
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Vic Rosenthal

Re: KPA500...standby vs. operate

In reply to this post by Macy monkeys

If you have a pet larger than a goldfish, you should probably put it
into standby. Unless your pet is licensed to transmit.

73,
Victor, 4X6GP
Rehovot, Israel
Formerly K2VCO
CWops no. 5
http://www.qsl.net/k2vco/

On 27/10/2019 18:36, Macy monkeys wrote:
> I am in and out of the shack all day with various nets and ragchews.
> Is there any advantage to putting the amp into standby between
> QSOs...or should I just leave it in operate?
>
> John K7FD
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Kenneth Christiansen

Re: KPA500...standby vs. operate

In reply to this post by Macy monkeys

I have a Kill A Watt meter. Plugging the kpa 500 in with front switch off draws 7 watts. Standby draws 12 watts and operate draws 13 watts. 500 watts out on 20 meters draws 1,140 watts.
Hope that helps.
Ken. W0CZ
w0cz@i29. Net

Sent from my iPhone

> On Oct 27, 2019, at 11:38 AM, Macy monkeys <[hidden email]> wrote:
>
> I am in and out of the shack all day with various nets and ragchews. Is there any advantage to putting the amp into standby between QSOs...or should I just leave it in operate?
>
> John K7FD
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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Macy monkeys

Re: KPA500...standby vs. operate

In reply to this post by Macy monkeys

Interesting! Thanks to all..
John K7FD

-----------------------------------------From: "Kenneth Christiansen"

To: "Macy monkeys"
Cc: [hidden email]
Sent: Sunday October 27 2019 11:15:43AM
Subject: Re: [Elecraft] KPA500...standby vs. operate

I have a Kill A Watt meter. Plugging the kpa 500 in with front switch
off draws 7 watts. Standby draws 12 watts and operate draws 13 watts.
500 watts out on 20 meters draws 1,140 watts.
Hope that helps.
Ken. W0CZ
w0cz@i29. Net

Sent from my iPhone

> On Oct 27, 2019, at 11:38 AM, Macy monkeys wrote:
>
> I am in and out of the shack all day with various nets and
ragchews. Is there any advantage to putting the amp into standby
between QSOs...or should I just leave it in operate?
>
> John K7FD
> ______________________________________________________________
> Elecraft mailing list
> Home: http://www.qsl.net [1]
> Please help support this email list:

Links:
------
[1] http://mailman.qth.net/mailman/listinfo/elecraft
http://mailman.qth.net/mailman/listinfo/elecraft
/> > Help: </a><a target=

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Elecraft mailing list

Re: KPA500...standby vs. operate

In reply to this post by Macy monkeys

The specific answer to your question isn’t in the hardware, but rather the firmware. With that in mind,
going to STBY does the following:
1) Bypasses the TR switch, so that the signal path goes direct between the input and output RF ports.
2) Turns off the 60V power to lessen the load.
3) It also does some housekeeping things like turn on and off LEDs.

Going into standby adds a few things to the obvious:
1) Check that the 270V bias power is valid,
2) Enables the TR switch (removing the signal bypass)
3) Enables 60V power.
4) Again, some housekeeping chores are performed.

Now, what do I do when leaving the op position even for a few minutes? I always put the KPA in STBY mode. It just seems safer that way.
But, I don’t really see much issue with leaving it in OPER mode.

I also have a habit of disabling K3 VOX when I get up. Again, safer.

73!
Jack, W6FB

> On Oct 27, 2019, at 11:43 AM, [hidden email] wrote:
>
> Interesting! Thanks to all..
> John K7FD
>
> -----------------------------------------From: "Kenneth Christiansen"
>
> To: "Macy monkeys"
> Cc: [hidden email]
> Sent: Sunday October 27 2019 11:15:43AM
> Subject: Re: [Elecraft] KPA500...standby vs. operate
>
> I have a Kill A Watt meter. Plugging the kpa 500 in with front switch
> off draws 7 watts. Standby draws 12 watts and operate draws 13 watts.
> 500 watts out on 20 meters draws 1,140 watts.
> Hope that helps.
> Ken. W0CZ
> w0cz@i29. Net
>
> Sent from my iPhone
>
>> On Oct 27, 2019, at 11:38 AM, Macy monkeys wrote:
>>
>> I am in and out of the shack all day with various nets and
> ragchews. Is there any advantage to putting the amp into standby
> between QSOs...or should I just leave it in operate?
>>
>> John K7FD
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://www.qsl.net [1]
>> Please help support this email list:
>
> Links:
> ------
> [1] http://mailman.qth.net/mailman/listinfo/elecraft
> http://mailman.qth.net/mailman/listinfo/elecraft
> /> > Help: </a><a target=
>
> ______________________________________________________________
> Elecraft mailing list
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Wes Stewart-2

Re: KPA500...standby vs. operate

You are putting it into standby two places. Don't you mean "operate" for the
second list of things?

I have a K-Pod button dedicated to turning VOX on and off.

Wes N7WS

On 10/27/2019 11:54 AM, Jack Brindle via Elecraft wrote:

> The specific answer to your question isn’t in the hardware, but rather the firmware. With that in mind,
> going to STBY does the following:
> 1) Bypasses the TR switch, so that the signal path goes direct between the input and output RF ports.
> 2) Turns off the 60V power to lessen the load.
> 3) It also does some housekeeping things like turn on and off LEDs.
>
> Going into standby adds a few things to the obvious:
> 1) Check that the 270V bias power is valid,
> 2) Enables the TR switch (removing the signal bypass)
> 3) Enables 60V power.
> 4) Again, some housekeeping chores are performed.
>
> Now, what do I do when leaving the op position even for a few minutes? I always put the KPA in STBY mode. It just seems safer that way.
> But, I don’t really see much issue with leaving it in OPER mode.
>
> I also have a habit of disabling K3 VOX when I get up. Again, safer.
>
> 73!
> Jack, W6FB
>
>

Mike Maloney

Re: KPA500...standby vs. operate

My kpa shows HV 76 both in standby AND operate. Drops to 61V, key down, 500W output. AC line input drops from 124 to 122V at same time.
Mike AC5P
On Sunday, October 27, 2019, 03:19:39 PM CDT, Wes <[hidden email]> wrote:

You are putting it into standby two places. Don't you mean "operate" for the
second list of things?

I have a K-Pod button dedicated to turning VOX on and off.

Wes N7WS

On 10/27/2019 11:54 AM, Jack Brindle via Elecraft wrote:

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Re: KPA500...standby vs. operate

In reply to this post by Wes Stewart-2

Yes. Wish I had caught that before I pressed the send button. Thanks!

73!
Jack, W6FB

> On Oct 27, 2019, at 1:18 PM, Wes <[hidden email]> wrote:
>
> You are putting it into standby two places. Don't you mean "operate" for the second list of things?
>
> I have a K-Pod button dedicated to turning VOX on and off.
>
> Wes N7WS
>
> On 10/27/2019 11:54 AM, Jack Brindle via Elecraft wrote:
>> The specific answer to your question isn’t in the hardware, but rather the firmware. With that in mind,
>> going to STBY does the following:
>> 1) Bypasses the TR switch, so that the signal path goes direct between the input and output RF ports.
>> 2) Turns off the 60V power to lessen the load.
>> 3) It also does some housekeeping things like turn on and off LEDs.
>>
>> Going into standby adds a few things to the obvious:
>> 1) Check that the 270V bias power is valid,
>> 2) Enables the TR switch (removing the signal bypass)
>> 3) Enables 60V power.
>> 4) Again, some housekeeping chores are performed.
>>
>> Now, what do I do when leaving the op position even for a few minutes? I always put the KPA in STBY mode. It just seems safer that way.
>> But, I don’t really see much issue with leaving it in OPER mode.
>>
>> I also have a habit of disabling K3 VOX when I get up. Again, safer.
>>
>> 73!
>> Jack, W6FB
>>
>>
>
> ______________________________________________________________
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Elecraft mailing list

Re: KPA500...standby vs. operate

In reply to this post by Mike Maloney

It all depends on where it is measured. It is switched after the measure point, so you will see a proper reading in both STBY and OPER.
It is not applied to the PA in STBY, though.

73!
Jack, W6fB

> On Oct 27, 2019, at 1:32 PM, Mike Maloney <[hidden email]> wrote:
>
> My kpa shows HV 76 both in standby AND operate. Drops to 61V, key down, 500W output. AC line input drops from 124 to 122V at same time.
> Mike AC5P
> On Sunday, October 27, 2019, 03:19:39 PM CDT, Wes <[hidden email]> wrote:
>
> You are putting it into standby two places. Don't you mean "operate" for the
> second list of things?
>
> I have a K-Pod button dedicated to turning VOX on and off.
>
> Wes N7WS
>
> On 10/27/2019 11:54 AM, Jack Brindle via Elecraft wrote:
>> The specific answer to your question isn’t in the hardware, but rather the firmware. With that in mind,
>> going to STBY does the following:
>> 1) Bypasses the TR switch, so that the signal path goes direct between the input and output RF ports.
>> 2) Turns off the 60V power to lessen the load.
>> 3) It also does some housekeeping things like turn on and off LEDs.
>>
>> Going into standby adds a few things to the obvious:
>> 1) Check that the 270V bias power is valid,
>> 2) Enables the TR switch (removing the signal bypass)
>> 3) Enables 60V power.
>> 4) Again, some housekeeping chores are performed.
>>
>> Now, what do I do when leaving the op position even for a few minutes? I always put the KPA in STBY mode. It just seems safer that way.
>> But, I don’t really see much issue with leaving it in OPER mode.
>>
>> I also have a habit of disabling K3 VOX when I get up. Again, safer.
>>
>> 73!
>> Jack, W6FB
>>
>>
>
> ______________________________________________________________
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ANDY DURBIN

KPA500...standby vs. operate

In reply to this post by Macy monkeys

"It all depends on where it is measured. It is switched after the measure point, so you will see a proper reading in both STBY and OPER.
It is not applied to the PA in STBY, though."

Yes indeed. In the PA module PA voltage and current are measured before K4 which is controlled by "60V ENABLE". 60 V to the PA module is controlled in the power supply by K1 which is labeled "60 volt enable" and driven by "60V ENBL" from the interlock switch. At a casual glance one might think "60V ENABLE" and 60V ENBL" were the same signal but it seems they are not. "60V ENABLE" seems to trace to "EN60V", then "EN60VA", and then "EN60A" from the MCU.

The connector numbering and signal names used in the KPA500 always make signal tracing an "interesting" challenge. I had to look because I often leave my KPA500 in OPER for hours when I'm not using it. Still can't see why that would a problem though.

73,
Andy, k3wyc
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Richard Lamont

Re: KPA500...standby vs. operate

In reply to this post by Don Wilhelm

Just measured the power consumption of my KPA500:

Standby 10 W / 16 VA
Operate 12 W / 16 VA

73,
Richard G4DYA

On 27/10/2019 16:59, Don Wilhelm wrote:

> John,
>
> I do not think there is any harm in leaving it in operate. If you are
> really "pinching pennies" on the electric bill, you might find a small
> advantage to switching it to standby.
>
> 73,
> Don W3FPR
>
> On 10/27/2019 12:36 PM, Macy monkeys wrote:
>> I am in and out of the shack all day with various nets and ragchews.
>> Is there any advantage to putting the amp into standby between
>> QSOs...or should I just leave it in operate?

T.H. Bauer

Re: KPA500...standby vs. operate

In reply to this post by Macy monkeys

Victor makes a good point. Although I no longer have pets, if I leave the
station (K3 + KPA500/KAT500) powered ON,
I place the KPA500 in Stby and the K3 into Test mode. That (hopefully)
ensures no errant transmissions while I am
away from the shack.
I have to admit that I have sometimes returned and forgotten to put the K3
back into Normal mode. Then I wonder
why there are no responses to my calls (!!). Iguess at 73 I'm entitled to a
few of those mistakes.
73
---
Ted WA3AER
CWops #1879

Date: Sun, 27 Oct 2019 19:53:54 +0200
From: Victor Rosenthal 4X6GP <[hidden email]>
To: [hidden email]
Subject: Re: [Elecraft] KPA500...standby vs. operate
Message-ID: <[hidden email]>
Content-Type: text/plain; charset=utf-8; format=flowed

If you have a pet larger than a goldfish, you should probably put it
into standby. Unless your pet is licensed to transmit.

73,
Victor, 4X6GP
Rehovot, Israel
Formerly K2VCO
CWops no. 5
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Michael Walker

Re: KPA500...standby vs. operate

I had a KPA500 at my remote station and I know that I have managed to leave
it on in Operate for weeks at a time by accident.

I don't think you need to worry about it.

Besides, it is a great watt meter even if you are in standby!

Mike va3mw

On Sun, Oct 27, 2019 at 8:14 PM T.H. Bauer <[hidden email]> wrote:

> Victor makes a good point. Although I no longer have pets, if I leave the
> station (K3 + KPA500/KAT500) powered ON,
> I place the KPA500 in Stby and the K3 into Test mode. That (hopefully)
> ensures no errant transmissions while I am
> away from the shack.
> I have to admit that I have sometimes returned and forgotten to put the K3
> back into Normal mode. Then I wonder
> why there are no responses to my calls (!!). Iguess at 73 I'm entitled to a
> few of those mistakes.
> 73
> ---
> Ted WA3AER
> CWops #1879
>
> Date: Sun, 27 Oct 2019 19:53:54 +0200
> From: Victor Rosenthal 4X6GP <[hidden email]>
> To: [hidden email]
> Subject: Re: [Elecraft] KPA500...standby vs. operate
> Message-ID: <[hidden email]>
> Content-Type: text/plain; charset=utf-8; format=flowed
>
> If you have a pet larger than a goldfish, you should probably put it
> into standby. Unless your pet is licensed to transmit.
>
> 73,
> Victor, 4X6GP
> Rehovot, Israel
> Formerly K2VCO
> CWops no. 5
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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>
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> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]
>

weaverwf@usermail.com

Re: KPA500...standby vs. operate

The danger that I find is leaving my K3 under windows rig control. I once found it sending out a string of dashesagter being left "on" (No the keyer paddle wasn't the cause:-)). I too am in the habit of throwing it into test mode when I leave it alone.

73,

Bill WE5P

>
> On Oct 27, 2019 at 22:19, Michael Walker <[hidden email]> wrote:
>
>
> I had a KPA500 at my remote station and I know that I have managed to leave it on in Operate for weeks at a time by accident. I don't think you need to worry about it. Besides, it is a great watt meter even if you are in standby! Mike va3mw On Sun, Oct 27, 2019 at 8:14 PM T.H. Bauer wrote: > Victor makes a good point. Although I no longer have pets, if I leave the > station (K3 + KPA500/KAT500) powered ON, > I place the KPA500 in Stby and the K3 into Test mode. That (hopefully) > ensures no errant transmissions while I am > away from the shack. > I have to admit that I have sometimes returned and forgotten to put the K3 > back into Normal mode. Then I wonder > why there are no responses to my calls (!!). Iguess at 73 I'm entitled to a > few of those mistakes. > 73 > --- > Ted WA3AER > CWops #1879 > > Date: Sun, 27 Oct 2019 19:53:54 +0200 > From: Victor Rosenthal 4X6GP > To: [hidden email] > Subject: Re: [Elecraft] KPA500...sta!
ndby vs.
operate > Message-ID: <[hidden email]> > Content-Type: text/plain; charset=utf-8; format=flowed > > If you have a pet larger than a goldfish, you should probably put it > into standby. Unless your pet is licensed to transmit. > > 73, > Victor, 4X6GP > Rehovot, Israel > Formerly K2VCO > CWops no. 5 > ______________________________________________________________ > 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 > Message delivered to [hidden email] > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list !
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>

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weaverwf@usermail.com

Re: KPA500...standby vs. operate

That gibberish should read dashes after (I hate typing on a tablet!).

73,

Bill WE5P

>
> On Oct 27, 2019 at 22:26, Bill Weaver <[hidden email]> wrote:
>
>
> The danger that I find is leaving my K3 under windows rig control. I once found it sending out a string of dashesagter being left "on" (No the keyer paddle wasn't the cause:-)). I too am in the habit of throwing it into test mode when I leave it alone. 73, Bill WE5P > > On Oct 27, 2019 at 22:19, Michael Walker wrote: > > > I had a KPA500 at my remote station and I know that I have managed to leave it on in Operate for weeks at a time by accident. I don't think you need to worry about it. Besides, it is a great watt meter even if you are in standby! Mike va3mw On Sun, Oct 27, 2019 at 8:14 PM T.H. Bauer wrote: > Victor makes a good point. Although I no longer have pets, if I leave the > station (K3 + KPA500/KAT500) powered ON, > I place the KPA500 in Stby and the K3 into Test mode. That (hopefully) > ensures no errant transmissions while I am > away from the shack. > I have to admit that I have sometimes returned and forgotten to put the K3 > back in!
to Normal
mode. Then I wonder > why there are no responses to my calls (!!). Iguess at 73 I'm entitled to a > few of those mistakes. > 73 > --- > Ted WA3AER > CWops #1879 > > Date: Sun, 27 Oct 2019 19:53:54 +0200 > From: Victor Rosenthal 4X6GP > To: [hidden email] > Subject: Re: [Elecraft] KPA500...sta! ndby vs. operate > Message-ID: <[hidden email]> > Content-Type: text/plain; charset=utf-8; format=flowed > > If you have a pet larger than a goldfish, you should probably put it > into standby. Unless your pet is licensed to transmit. > > 73, > Victor, 4X6GP > Rehovot, Israel > Formerly K2VCO > CWops no. 5 > ______________________________________________________________ > 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 h!
elp suppo
rt this email list: http://www.qsl.net/donate.html > Message delivered to [hidden email] > ______________________________________________________________ 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 Message delivered to [hidden email] > ______________________________________________________________ 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 Message delivered to [hidden email]
>

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K9MA

Re: KPA500...standby vs. operate

In reply to this post by weaverwf@usermail.com

I guess I'm old-fashioned, but I still don't quite trust this thing with
all the software. So I have an actual mechanical "switch" between the
computer and the radio. When I turn it off, there is absolutely no way
Windows can transmit. (It's also handy when the computer goes berserk in
the middle of a contest.) But the radio also has this software stuff in
it, so I put the amplifier in standby, the idea being that 100 W
probably won't do as much damage as 1500. Unless, of course, I deem it
worth the trouble to turn off the other switches.

73,
Scott K9MA

On 10/27/2019 21:26, Bill Weaver wrote:

>
>
> The danger that I find is leaving my K3 under windows rig control. I once found it sending out a string of dashesagter being left "on" (No the keyer paddle wasn't the cause:-)). I too am in the habit of throwing it into test mode when I leave it alone.
>
>
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> 73,
>
> Bill WE5P
>
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--
Scott K9MA

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