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Re: KAT500/KPA500 with Icom 7600 accessory cable

Let’s take a step back and make sure the KAT500 and KPA500 work properly with RF sensing for a tune. Unplug the mini-phone plug from the KAT500. This will leave the KAT powered from the 7600, but requesting a tune from the 7600 won’t cause the KAT to respond. Next key the radio and make sure everything works properly. After that, change bands on the radio and re-key. Both the Kat and KPA will sense the new band and both should change. The KAT will further require a tune and should break the key line causing the KPA to drop out of transmit.

Try this test and let me know what happens.

Oh, and before I forget, there is actually no soldering involved in assembling either the KPA500 or the KAT500. They are both no-solder kits. But there are a lot of mechanical tasks such as screwing in small screws and tightening nuts. Having just assembled one of each of these, I can’t say I blame you for buying it factory-built.

73!
Jack, W6FB

> On Dec 30, 2018, at 6:30 PM, Ken B <[hidden email]> wrote:
>
> Thank you - I followed Fig 3 on page 10 which is specific to ICOM. Yes all cables ohm'd out with no shorts
>
>
>
> From: Jack Brindle <[hidden email]>
> To: Ken B <[hidden email]>
> Cc: "[hidden email]" <[hidden email]>
> Sent: Sunday, December 30, 2018 8:28 PM
> Subject: Re: [Elecraft] KAT500/KPA500 with Icom 7600 accessory cable
>
> Great! Thanks for the detail. Table 2 on page 8 of the KAT500 manual should have given you the exact connections you needed to make for the Molex to KAT500 cable. Note that the plug o the KAt500 end is stereo with tip, ring and sleeve. Please recheck these connections to make sure that pin 4 of the Molex does indeed go to the sleeve of the mini-phone plug. It would be best to ohm out the cable to make sure the signals go to the right places and there are no shorts between pins.
>
> Table 3 on that same page shows the Key-line connections, which I suspect are correct at the point. In any case be sure to check that cable as well.
>
> 73!
> Jack, W6FB
>
>
>> On Dec 30, 2018, at 4:13 PM, Ken B <[hidden email] <mailto:[hidden email]>> wrote:
>>
>> Good evening
>>
>> The Icom IC-7600 KAT500, and KPA500 are each grounded to a single terminal strip with a #10 cable directly to a ground rod 15 ft away. The rod is 12 ft deep. Both the KAP and KTA were factory built as my soldering skills have diminished since the Army training.
>>
>>
>> The IC7600
>> - In the back of the 7600 is a 4 conductor molex connector. The Icom made cable splits into 2 connections on the KAT, the first is plugged into DC power, and the second is plugged into the Tuner connection
>>
>> - In the back of the 7600 is also a 7 conductor DIM connection (Acc2). I made a cable to connect pin 3 to the KAT PTT RLY
>>
>>
>> The KAT
>> - Other than mentioned above ant1 goes out to the antenna
>> - XMTR is connected via a 2 ft piece of LMR400 to the output of the KAP
>> - The unlabeled connector above the PTT RLY goes to the PA Key of the KAP
>>
>>
>> The KAP
>> - Other than what is mentioned above the only other connection is a piece of LMR400 from Ant1 on the 7600 to input on the KAP.
>>
>> From: Jack Brindle <[hidden email] <mailto:[hidden email]>>
>> To: "[hidden email] <mailto:[hidden email]>" <[hidden email] <mailto:[hidden email]>>
>> Cc: "[hidden email] <mailto:[hidden email]>" <[hidden email] <mailto:[hidden email]>>
>> Sent: Sunday, December 30, 2018 5:31 PM
>> Subject: Re: [Elecraft] KAT500/KPA500 with Icom 7600 accessory cable
>>
>> Yeah, but we really want to get the problem solved so you can enjoy your KPA500 and KAT500 as much as we enjoy ours.
>> That connection list will be most helpful in this effort.
>>
>> My thinking on the ground issue is that the power-plug ground is completing a circuit that should not exist and thus disrupting
>> operations on band change. The question would be what is connected to ground that should not be, and where?
>> Are the KPA and KATs kits or did they come assembled?
>>
>> 73!
>> Jack, W6FB
>>
>>> On Dec 30, 2018, at 2:22 PM, Ken B <[hidden email] <mailto:[hidden email]>> wrote:
>>>
>>> Please allow me to clairify. Everyone deserves time off. I work 60 to 70 hrs per week and appricate the down time
>>>
>>> Sent from Yahoo Mail on Android <https://go.onelink.me/107872968?pid=InProduct&c=Global_Internal_YGrowth_AndroidEmailSig__AndroidUsers&af_wl=ym&af_sub1=Internal&af_sub2=Global_YGrowth&af_sub3=EmailSignature>
>>> On Sun, Dec 30, 2018 at 5:07 PM, Jack Brindle
>>> <[hidden email] <mailto:[hidden email]>> wrote:
>>> The folks in Watsonville are taking a well deserved rest, but some of us are still around. This sounds a lot like a grounding issue in your setup with ground being completed through the wall power ground pin. Tell me exactly all of the cables/connections going to the KPA500 (and from where). While you are at it you might as well do the same for the KAT500. I’ll try to decipher what is going on from this information and hopefully get a good solution for you quickly.
>>>
>>> 73!
>>> Jack, W6FB
>>> Elecraft Engineering
>>>
>>>
>>> > On Dec 30, 2018, at 1:55 PM, Ken B via Elecraft <[hidden email] <mailto:[hidden email]>> wrote:
>>> >
>>> > Thanks for the suggestion
>>> > Sorry for the delay the wife and I went out. The only way I can get it all to work properly is to:- Remove AC power from the AMP (simply turning it off dowes not work) - On the radio (icom 7600) select the band (ensure auto tuner on Radio is off) - On Radio select AM and depress PTT - While holding PTT, hit the tune button on the KAT500 - Let if get to 1.2 and stop - Let go PTT and select SSB on Radio- Plug in AC power to KPA and power on - On KPA select the proper band- On the KPA select operate from Standby
>>> > All works until I change bands then it is start from the top Cleared all memory
>>> > Wish Elecraft was open on Monday.
>>> > ThanksKen
>>> >
>>> > From: Don Wilhelm <[hidden email] <mailto:[hidden email]>>
>>> > To: "[hidden email] <mailto:[hidden email]>" <[hidden email] <mailto:[hidden email]>>; "[hidden email] <mailto:[hidden email]>" <[hidden email] <mailto:[hidden email]>>
>>> > Sent: Sunday, December 30, 2018 8:39 AM
>>> > Subject: Re: [Elecraft] KAT500/KPA500 with Icom 7600 accessory cable
>>> >
>>> > Ken,
>>> >
>>> > If that Send cable is the only one you have connected between your Icom
>>> > and the KAT500, you need to feed a bit of RF to initiate a TUNE
>>> >
>>> > The KAT500 will first look for a saved L/C combination for that antenna
>>> > and frequency and will switch to that rather than doing a TUNE.
>>> > Secondly, it will compute the SWR and if it is below 1.5, it will go
>>> > into bypass - no tuning is necessary.
>>> >
>>> > Is it possible that either one of those conditions exist?
>>> >
>>> > 73,
>>> > Don W3FPR
>>> >
>>> > On 12/30/2018 6:12 AM, Ken B wrote:
>>> >> Yes from the 7600 accessory 1 pin 3 to the kat500
>>> >>
>>> >> Sent from Yahoo Mail on Android
>>> >> <https://go.onelink.me/107872968?pid=InProduct&c=Global_Internal_YGrowth_AndroidEmailSig__AndroidUsers⁡_wl=ym⁡_sub1=Internal⁡_sub2=Global_YGrowth⁡_sub3=EmailSignature <https://go.onelink.me/107872968?pid=InProduct&c=Global_Internal_YGrowth_AndroidEmailSig__AndroidUsers%E2%81%A1_wl=ym%E2%81%A1_sub1=Internal%E2%81%A1_sub2=Global_YGrowth%E2%81%A1_sub3=EmailSignature>>
>>> >>
>>> >> On Sun, Dec 30, 2018 at 4:52 AM, Don Wilhelm
>>> >> <[hidden email] <mailto:[hidden email]>> wrote:
>>> >> Ken,
>>> >>
>>> >> Do you have the cable wired first to the KAT500 and then on to the
>>> >> KPA500?
>>> >> The KAT500 must interrupt the keying of the KPA500 when it needs
>>> >> to tune.
>>> >>
>>> >> 73,
>>> >> Don W3FPR
>>> >>
>>> >> On 12/29/2018 10:13 PM, Ken B wrote:
>>> >> > Thank you Don.
>>> >> > The pin 3 (send) did the trick perfectly. Now it works at 300 to
>>> >> 400
>>> >> > watts out with 20 in. The problem i have now is when i switch bands
>>> >> > the kat will not tune unless i remove all AC power from the amp.
>>> >> >
>>> >> >
>>> >> > Sent from Yahoo Mail on Android
>>> >> >
>>> >> <https://go.onelink.me/107872968?pid=InProduct&c=Global_Internal_YGrowth_AndroidEmailSig__AndroidUsers⁡_wl=ym⁡_sub1=Internal⁡_sub2=Global_YGrowth⁡_sub3=EmailSignature <https://go.onelink.me/107872968?pid=InProduct&c=Global_Internal_YGrowth_AndroidEmailSig__AndroidUsers%E2%81%A1_wl=ym%E2%81%A1_sub1=Internal%E2%81%A1_sub2=Global_YGrowth%E2%81%A1_sub3=EmailSignature>
>>> >> <https://go.onelink.me/107872968?pid=InProduct&c=Global_Internal_YGrowth_AndroidEmailSig__AndroidUsers⁡_wl=ym⁡_sub1=Internal⁡_sub2=Global_YGrowth⁡_sub3=EmailSignature <https://go.onelink.me/107872968?pid=InProduct&c=Global_Internal_YGrowth_AndroidEmailSig__AndroidUsers%E2%81%A1_wl=ym%E2%81%A1_sub1=Internal%E2%81%A1_sub2=Global_YGrowth%E2%81%A1_sub3=EmailSignature>>>
>>> >>
>>> >>
>>> >> >
>>> >> > On Thu, Dec 27, 2018 at 11:36 PM, Don Wilhelm
>>> >> > <[hidden email] <mailto:[hidden email]> <mailto:[hidden email] <mailto:[hidden email]>>> wrote:
>>> >> > Ken,
>>> >> >
>>> >> > Look at your Icom 7600 documentation. I believe the
>>> >> 'keyword' may be
>>> >> > "Send" or Keyout or something of that nature (PTT should be an
>>> >> > input to
>>> >> > the transceiver, not an output, but some manufacturers mix
>>> >> them up
>>> >> > causing confusion - check the documentation).
>>> >> > Connect that output from your transceiver first to the KAT500
>>> >> AMP KEY
>>> >> > connector and from the other KAT500 AMP KEY connector to the
>>> >> KPA500.
>>> >> > That allows the KAT500 to disable the amplifier keying if the
>>> >> KAT500
>>> >> > needs to tune.
>>> >> >
>>> >> > You should then be "good to go" with the basic cabling. When
>>> >> you get
>>> >> > the proper cable, it will integrate better with your Icom,
>>> >> but the
>>> >> > basic
>>> >> > cabling will get you on the air with your new toys.
>>> >> >
>>> >> > 73,
>>> >> > Don W3FPR
>>> >> >
>>> >> > On 12/27/2018 11:14 PM, Ken B via Elecraft wrote:
>>> >> > > Just received my the kap500 and found out it was missing the
>>> >> > accessory cable which goes from the icom 7600 to the kat500.
>>> >> > Elecraft is sending one but it might take a week. In the mean
>>> >> time
>>> >> > does anyone have the accessory pin outs to rca plug so i can make
>>> >> > one and use my new toy.
>>> >> > > Thank youKenKc1icn
>>>
>>> >> >
>>> >>
>>> >
>>> >
>>> >
>>> >
>>> > ______________________________________________________________
>>> > Elecraft mailing list
>>> > Home: http://mailman.qth.net/mailman/listinfo/elecraft <http://mailman.qth.net/mailman/listinfo/elecraft>
>>> > Help: http://mailman.qth.net/mmfaq.htm <http://mailman.qth.net/mmfaq.htm>
>>> > Post: mailto:[hidden email] <mailto:[hidden email]>
>>> >
>>> > This list hosted by: http://www.qsl.net <http://www.qsl.net/>
>>> > Please help support this email list: http://www.qsl.net/donate.html <http://www.qsl.net/donate.html>
>>> > Message delivered to [hidden email] <mailto:[hidden email]>
>>>
>>
>>
>>
>
>
>

Bob McGraw - K4TAX

Re: KAT500/KPA500 with Icom 7600 accessory cable

In reply to this post by Elecraft mailing list

I have followed this discussion with interest.    I do agree with Jack
the issue seems to be related to a grounding issue. And I agree with
Jim as his assessment likewise.   His work and that of W. Silver from
ARRL does support this thinking.   [The ARRL publication Grounding and
Bonding for The Radio Amateur is a MUST HAVE for every station.]

Three points:

(a) each piece of equipment should be connected to the station supply
via a dedicated ground/bond conductor.

(b) the 12 ft driven ground with 0 ohms resistance is questionable. And
if this ground rod is not bonded back to the AC Mains ground outside of
the house, this must be corrected as it presents a dangerous condition
and clearly is not in compliance with NEC.

(c) the power strip being used for the station equipment, from my
experience, is usually questionable in terms of integrity.

I would disconnect any station ground to the outside. Anyway, any and
all of the lightning protection devices should be applied to each feed
line and rotor line outside of the structure and connected to the driven
ground. Again, this ground must be bonded back to the AC mains ground.

I would connect each piece of equipment with a dedicated ground/bond
conductor to the station power supply ground terminal.   For this I use
#10 AWG auto primary wire with a suitable ring terminal which is crimped
and soldered on each end.   As to the power supply ground point, do note
that the DC negative may or may not be connected to power supply ground.

For station AC power distribution, lacking dedicated wall outlets, I
make quad boxes using good quality duplex outlets and caps {plugs} and
do not use the "stab" type connection. Hook the wire around the screw
clockwise and tighten the screw. Use #12-3 rubber covered,{ SJ as I
recall} for the pigtail.

I would then re-evaluate the condition of concern.

73

Bob, K4TAX

On 12/30/2018 8:30 PM, Ken B via Elecraft wrote:

> Thank you - I followed Fig 3 on page 10 which is specific to ICOM. Yes all cables ohm'd out with no shorts
>
> From: Jack Brindle <[hidden email]>
> To: Ken B <[hidden email]>
> Cc: "[hidden email]" <[hidden email]>
> Sent: Sunday, December 30, 2018 8:28 PM
> Subject: Re: [Elecraft] KAT500/KPA500 with Icom 7600 accessory cable
>
> Great! Thanks for the detail. Table 2 on page 8 of the KAT500 manual should have given you the exact connections you needed to make for the Molex to KAT500 cable. Note that the plug o the KAt500 end is stereo with tip, ring and sleeve. Please recheck these connections to make sure that pin 4 of the Molex does indeed go to the sleeve of the mini-phone plug. It would be best to ohm out the cable to make sure the signals go to the right places and there are no shorts between pins.
> Table 3 on that same page shows the Key-line connections, which I suspect are correct at the point. In any case be sure to check that cable as well.
> 73!Jack, W6FB
>
>
> On Dec 30, 2018, at 4:13 PM, Ken B <[hidden email]> wrote:
> Good evening  The Icom IC-7600 KAT500, and KPA500 are each grounded to a single terminal strip with a #10 cable directly to a ground rod 15 ft away. The rod is 12 ft deep. Both the KAP and KTA were factory built as my soldering skills have diminished since the Army training.
>
> The IC7600 - In the back of the 7600 is a 4 conductor molex connector. The Icom made cable splits into 2 connections on the KAT, the first is plugged into DC power, and the second is plugged into the Tuner connection
> - In the back of the 7600 is also a 7 conductor DIM connection (Acc2). I made a cable to connect pin 3 to the KAT PTT RLY
>
> The KAT  - Other than mentioned above ant1 goes out to the antenna- XMTR is connected via a 2 ft piece of LMR400 to the output of the KAP- The unlabeled connector above the PTT RLY goes to the PA Key of the KAP
>
> The KAP - Other than what is mentioned above the only other connection is a piece of LMR400 from Ant1 on the 7600 to input on the KAP.
>
> From: Jack Brindle <[hidden email]>
> To: "[hidden email]" <[hidden email]>
> Cc: "[hidden email]" <[hidden email]>
> Sent: Sunday, December 30, 2018 5:31 PM
> Subject: Re: [Elecraft] KAT500/KPA500 with Icom 7600 accessory cable
>
> Yeah, but we really want to get the problem solved so you can enjoy your KPA500 and KAT500 as much as we enjoy ours.That connection list will be most helpful in this effort.
> My thinking on the ground issue is that the power-plug ground is completing a circuit that should not exist and thus disruptingoperations on band change. The question would be what is connected to ground that should not be, and where?Are the KPA and KATs kits or did they come assembled?
> 73!Jack, W6FB
>
> On Dec 30, 2018, at 2:22 PM, Ken B <[hidden email]> wrote:
> Please allow me to clairify. Everyone deserves time off. I work 60 to 70 hrs per week and appricate the down time
> Sent from Yahoo Mail on Android
>
> On Sun, Dec 30, 2018 at 5:07 PM, Jack Brindle<[hidden email]> wrote: The folks in Watsonville are taking a well deserved rest, but some of us are still around. This sounds a lot like a grounding issue in your setup with ground being completed through the wall power ground pin. Tell me exactly all of the cables/connections going to the KPA500 (and from where). While you are at it you might as well do the same for the KAT500. I’ll try to decipher what is going on from this information and hopefully get a good solution for you quickly.
>
> 73!
> Jack, W6FB
> Elecraft Engineering
>
>
>> On Dec 30, 2018, at 1:55 PM, Ken B via Elecraft <[hidden email]> wrote:
>>
>> Thanks for the suggestion
>> Sorry for the delay the wife and I went out. The only way I can get it all to work properly is to:- Remove AC power from the AMP (simply turning it off dowes not work) - On the radio (icom 7600) select the band (ensure auto tuner on Radio is off) - On Radio select AM and depress PTT - While holding PTT, hit the tune button on the KAT500 - Let if get to 1.2 and stop - Let go PTT and select SSB on Radio- Plug in AC power to KPA and power on - On KPA select the proper band- On the KPA select operate from Standby
>> All works until I change bands then it is start from the top Cleared all memory
>> Wish Elecraft was open on Monday.
>> ThanksKen
>>
>>    From: Don Wilhelm <[hidden email]>
>> To: "[hidden email]" <[hidden email]>; "[hidden email]" <[hidden email]>
>> Sent: Sunday, December 30, 2018 8:39 AM
>> Subject: Re: [Elecraft] KAT500/KPA500 with Icom 7600 accessory cable
>>
>> Ken,
>>
>> If that Send cable is the only one you have connected between your Icom
>> and the KAT500, you need to feed a bit of RF to initiate a TUNE
>>
>> The KAT500 will first look for a saved L/C combination for that antenna
>> and frequency and will switch to that rather than doing a TUNE.
>> Secondly, it will compute the SWR and if it is below 1.5, it will go
>> into bypass - no tuning is necessary.
>>
>> Is it possible that either one of those conditions exist?
>>
>> 73,
>> Don W3FPR
>>
>> On 12/30/2018 6:12 AM, Ken B wrote:
>>> Yes from the 7600 accessory 1 pin 3 to the kat500
>>>
>>> Sent from Yahoo Mail on Android
>>> <https://go.onelink.me/107872968?pid=InProduct&c=Global_Internal_YGrowth_AndroidEmailSig__AndroidUsers⁡_wl=ym⁡_sub1=Internal⁡_sub2=Global_YGrowth⁡_sub3=EmailSignature>
>>>
>>>    On Sun, Dec 30, 2018 at 4:52 AM, Don Wilhelm
>>>    <[hidden email]> wrote:
>>>    Ken,
>>>
>>>    Do you have the cable wired first to the KAT500 and then on to the
>>>    KPA500?
>>>    The KAT500 must interrupt the keying of the KPA500 when it needs
>>>    to tune.
>>>
>>>    73,
>>>    Don W3FPR
>>>
>>>    On 12/29/2018 10:13 PM, Ken B wrote:
>>>    > Thank you Don.
>>>    > The pin 3 (send) did the trick perfectly. Now it works at 300 to
>>>    400
>>>    > watts out with 20 in. The problem i have now is when i switch bands
>>>    > the kat will not tune unless i remove all AC power from the amp.
>>>    >
>>>    >
>>>    > Sent from Yahoo Mail on Android
>>>    >
>>>    <https://go.onelink.me/107872968?pid=InProduct&c=Global_Internal_YGrowth_AndroidEmailSig__AndroidUsers⁡_wl=ym⁡_sub1=Internal⁡_sub2=Global_YGrowth⁡_sub3=EmailSignature
>>>    <https://go.onelink.me/107872968?pid=InProduct&c=Global_Internal_YGrowth_AndroidEmailSig__AndroidUsers⁡_wl=ym⁡_sub1=Internal⁡_sub2=Global_YGrowth⁡_sub3=EmailSignature>>
>>>
>>>
>>>    >
>>>    > On Thu, Dec 27, 2018 at 11:36 PM, Don Wilhelm
>>>    > <[hidden email] <mailto:[hidden email]>> wrote:
>>>    > Ken,
>>>    >
>>>    > Look at your Icom 7600 documentation. I believe the
>>>    'keyword' may be
>>>    > "Send" or Keyout or something of that nature (PTT should be an
>>>    > input to
>>>    > the transceiver, not an output, but some manufacturers mix
>>>    them up
>>>    > causing confusion - check the documentation).
>>>    > Connect that output from your transceiver first to the KAT500
>>>    AMP KEY
>>>    > connector and from the other KAT500 AMP KEY connector to the
>>>    KPA500.
>>>    > That allows the KAT500 to disable the amplifier keying if the
>>>    KAT500
>>>    > needs to tune.
>>>    >
>>>    > You should then be "good to go" with the basic cabling. When
>>>    you get
>>>    > the proper cable, it will integrate better with your Icom,
>>>    but the
>>>    > basic
>>>    > cabling will get you on the air with your new toys.
>>>    >
>>>    > 73,
>>>    > Don W3FPR
>>>    >
>>>    > On 12/27/2018 11:14 PM, Ken B via Elecraft wrote:
>>>    > > Just received my the kap500 and found out it was missing the
>>>    > accessory cable which goes from the icom 7600 to the kat500.
>>>    > Elecraft is sending one but it might take a week. In the mean
>>>    time
>>>    > does anyone have the accessory pin outs to rca plug so i can make
>>>    > one and use my new toy.
>>>    > > Thank youKenKc1icn
>>>    >
>>>
>>
>>
>>
>> ______________________________________________________________
>> 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]

Elecraft mailing list

Re: KAT500/KPA500 with Icom 7600 accessory cable

In reply to this post by Elecraft mailing list

Thank you Jack
Sorry for the delay was helping to prepare for todays town wide charity dinner, where we typically feed 4-500 people
Will check when I get back home later today.

From: Jack Brindle <[hidden email]>
To: Ken B <[hidden email]>
Cc: "[hidden email]" <[hidden email]>
Sent: Sunday, December 30, 2018 9:53 PM
Subject: Re: [Elecraft] KAT500/KPA500 with Icom 7600 accessory cable

Let’s take a step back and make sure the KAT500 and KPA500 work properly with RF sensing for a tune. Unplug the mini-phone plug from the KAT500. This will leave the KAT powered from the 7600, but requesting a tune from the 7600 won’t cause the KAT to respond. Next key the radio and make sure everything works properly. After that, change bands on the radio and re-key. Both the Kat and KPA will sense the new band and both should change. The KAT will further require a tune and should break the key line causing the KPA to drop out of transmit.
Try this test and let me know what happens.
Oh, and before I forget, there is actually no soldering involved in assembling either the KPA500 or the KAT500. They are both no-solder kits. But there are a lot of mechanical tasks such as screwing in small screws and tightening nuts. Having just assembled one of each of these, I can’t say I blame you for buying it factory-built.
73!Jack, W6FB

On Dec 30, 2018, at 6:30 PM, Ken B <[hidden email]> wrote:
Thank you - I followed Fig 3 on page 10 which is specific to ICOM. Yes all cables ohm'd out with no shorts

From: Jack Brindle <[hidden email]>
To: Ken B <[hidden email]>
Cc: "[hidden email]" <[hidden email]>
Sent: Sunday, December 30, 2018 8:28 PM
Subject: Re: [Elecraft] KAT500/KPA500 with Icom 7600 accessory cable

Great! Thanks for the detail. Table 2 on page 8 of the KAT500 manual should have given you the exact connections you needed to make for the Molex to KAT500 cable. Note that the plug o the KAt500 end is stereo with tip, ring and sleeve. Please recheck these connections to make sure that pin 4 of the Molex does indeed go to the sleeve of the mini-phone plug. It would be best to ohm out the cable to make sure the signals go to the right places and there are no shorts between pins.
Table 3 on that same page shows the Key-line connections, which I suspect are correct at the point. In any case be sure to check that cable as well.
73!Jack, W6FB

On Dec 30, 2018, at 4:13 PM, Ken B <[hidden email]> wrote:
Good evening  The Icom IC-7600 KAT500, and KPA500 are each grounded to a single terminal strip with a #10 cable directly to a ground rod 15 ft away. The rod is 12 ft deep. Both the KAP and KTA were factory built as my soldering skills have diminished since the Army training.

The IC7600 - In the back of the 7600 is a 4 conductor molex connector. The Icom made cable splits into 2 connections on the KAT, the first is plugged into DC power, and the second is plugged into the Tuner connection
- In the back of the 7600 is also a 7 conductor DIM connection (Acc2). I made a cable to connect pin 3 to the KAT PTT RLY

The KAT  - Other than mentioned above ant1 goes out to the antenna- XMTR is connected via a 2 ft piece of LMR400 to the output of the KAP- The unlabeled connector above the PTT RLY goes to the PA Key of the KAP

The KAP - Other than what is mentioned above the only other connection is a piece of LMR400 from Ant1 on the 7600 to input on the KAP.

From: Jack Brindle <[hidden email]>
To: "[hidden email]" <[hidden email]>
Cc: "[hidden email]" <[hidden email]>
Sent: Sunday, December 30, 2018 5:31 PM
Subject: Re: [Elecraft] KAT500/KPA500 with Icom 7600 accessory cable

Yeah, but we really want to get the problem solved so you can enjoy your KPA500 and KAT500 as much as we enjoy ours.That connection list will be most helpful in this effort.
My thinking on the ground issue is that the power-plug ground is completing a circuit that should not exist and thus disruptingoperations on band change. The question would be what is connected to ground that should not be, and where?Are the KPA and KATs kits or did they come assembled?
73!Jack, W6FB

On Dec 30, 2018, at 2:22 PM, Ken B <[hidden email]> wrote:
Please allow me to clairify. Everyone deserves time off. I work 60 to 70 hrs per week and appricate the down time
Sent from Yahoo Mail on Android

On Sun, Dec 30, 2018 at 5:07 PM, Jack Brindle<[hidden email]> wrote: The folks in Watsonville are taking a well deserved rest, but some of us are still around. This sounds a lot like a grounding issue in your setup with ground being completed through the wall power ground pin. Tell me exactly all of the cables/connections going to the KPA500 (and from where). While you are at it you might as well do the same for the KAT500. I’ll try to decipher what is going on from this information and hopefully get a good solution for you quickly.

73!
Jack, W6FB
Elecraft Engineering

> On Dec 30, 2018, at 1:55 PM, Ken B via Elecraft <[hidden email]> wrote:
>
> Thanks for the suggestion
> Sorry for the delay the wife and I went out. The only way I can get it all to work properly is to:- Remove AC power from the AMP (simply turning it off dowes not work) - On the radio (icom 7600) select the band (ensure auto tuner on Radio is off) - On Radio select AM and depress PTT - While holding PTT, hit the tune button on the KAT500 - Let if get to 1.2 and stop - Let go PTT and select SSB on Radio- Plug in AC power to KPA and power on - On KPA select the proper band- On the KPA select operate from Standby
> All works until I change bands then it is start from the top Cleared all memory
> Wish Elecraft was open on Monday.
> ThanksKen
>
> From: Don Wilhelm <[hidden email]>
> To: "[hidden email]" <[hidden email]>; "[hidden email]" <[hidden email]>
> Sent: Sunday, December 30, 2018 8:39 AM
> Subject: Re: [Elecraft] KAT500/KPA500 with Icom 7600 accessory cable
>
> Ken,
>
> If that Send cable is the only one you have connected between your Icom
> and the KAT500, you need to feed a bit of RF to initiate a TUNE
>
> The KAT500 will first look for a saved L/C combination for that antenna
> and frequency and will switch to that rather than doing a TUNE.
> Secondly, it will compute the SWR and if it is below 1.5, it will go
> into bypass - no tuning is necessary.
>
> Is it possible that either one of those conditions exist?
>
> 73,
> Don W3FPR
>
> On 12/30/2018 6:12 AM, Ken B wrote:
>> Yes from the 7600 accessory 1 pin 3 to the kat500
>>
>> Sent from Yahoo Mail on Android
>> <https://go.onelink.me/107872968?pid=InProduct&c=Global_Internal_YGrowth_AndroidEmailSig__AndroidUsers⁡_wl=ym⁡_sub1=Internal⁡_sub2=Global_YGrowth⁡_sub3=EmailSignature>
>>
>> On Sun, Dec 30, 2018 at 4:52 AM, Don Wilhelm
>> <[hidden email]> wrote:
>> Ken,
>>
>> Do you have the cable wired first to the KAT500 and then on to the
>> KPA500?
>> The KAT500 must interrupt the keying of the KPA500 when it needs
>> to tune.
>>
>> 73,
>> Don W3FPR
>>
>> On 12/29/2018 10:13 PM, Ken B wrote:
>> > Thank you Don.
>> > The pin 3 (send) did the trick perfectly. Now it works at 300 to
>> 400
>> > watts out with 20 in. The problem i have now is when i switch bands
>> > the kat will not tune unless i remove all AC power from the amp.
>> >
>> >
>> > Sent from Yahoo Mail on Android
>> >
>> <https://go.onelink.me/107872968?pid=InProduct&c=Global_Internal_YGrowth_AndroidEmailSig__AndroidUsers⁡_wl=ym⁡_sub1=Internal⁡_sub2=Global_YGrowth⁡_sub3=EmailSignature
>> <https://go.onelink.me/107872968?pid=InProduct&c=Global_Internal_YGrowth_AndroidEmailSig__AndroidUsers⁡_wl=ym⁡_sub1=Internal⁡_sub2=Global_YGrowth⁡_sub3=EmailSignature>>
>>
>>
>> >
>> > On Thu, Dec 27, 2018 at 11:36 PM, Don Wilhelm
>> > <[hidden email] <mailto:[hidden email]>> wrote:
>> > Ken,
>> >
>> > Look at your Icom 7600 documentation. I believe the
>> 'keyword' may be
>> > "Send" or Keyout or something of that nature (PTT should be an
>> > input to
>> > the transceiver, not an output, but some manufacturers mix
>> them up
>> > causing confusion - check the documentation).
>> > Connect that output from your transceiver first to the KAT500
>> AMP KEY
>> > connector and from the other KAT500 AMP KEY connector to the
>> KPA500.
>> > That allows the KAT500 to disable the amplifier keying if the
>> KAT500
>> > needs to tune.
>> >
>> > You should then be "good to go" with the basic cabling. When
>> you get
>> > the proper cable, it will integrate better with your Icom,
>> but the
>> > basic
>> > cabling will get you on the air with your new toys.
>> >
>> > 73,
>> > Don W3FPR
>> >
>> > On 12/27/2018 11:14 PM, Ken B via Elecraft wrote:
>> > > Just received my the kap500 and found out it was missing the
>> > accessory cable which goes from the icom 7600 to the kat500.
>> > Elecraft is sending one but it might take a week. In the mean
>> time
>> > does anyone have the accessory pin outs to rca plug so i can make
>> > one and use my new toy.
>> > > Thank youKenKc1icn
>> >
>>
>
>
>
>
> ______________________________________________________________
> 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]

Cady, Fred-2

Re: KAT500/KPA500 with Icom 7600 accessory cable

In reply to this post by Don Wilhelm

Hi Ken,

If you haven't seen them, these may be a help to you.

http://www.ke7x.com/home/k-line-introduction-and-set-up-guide

Cheers and 73,

Fred KE7X

For all KE7X Elecraft books and the new "Successful Ham Radio Operator's Handbook", see www.ke7x.com<http://www.ke7x.com>

________________________________
From: [hidden email] <[hidden email]> on behalf of Don Wilhelm <[hidden email]>
Sent: Sunday, December 30, 2018 6:39 AM
To: [hidden email]; [hidden email]
Subject: Re: [Elecraft] KAT500/KPA500 with Icom 7600 accessory cable

Ken,

If that Send cable is the only one you have connected between your Icom
and the KAT500, you need to feed a bit of RF to initiate a TUNE

The KAT500 will first look for a saved L/C combination for that antenna
and frequency and will switch to that rather than doing a TUNE.
Secondly, it will compute the SWR and if it is below 1.5, it will go
into bypass - no tuning is necessary.

Is it possible that either one of those conditions exist?

73,
Don W3FPR

On 12/30/2018 6:12 AM, Ken B wrote:

> Yes from the 7600 accessory 1 pin 3 to the kat500
>
> Sent from Yahoo Mail on Android
> <https://go.onelink.me/107872968?pid=InProduct&c=Global_Internal_YGrowth_AndroidEmailSig__AndroidUsers&af_wl=ym&af_sub1=Internal&af_sub2=Global_YGrowth&af_sub3=EmailSignature>
>
> On Sun, Dec 30, 2018 at 4:52 AM, Don Wilhelm
> <[hidden email]> wrote:
> Ken,
>
> Do you have the cable wired first to the KAT500 and then on to the
> KPA500?
> The KAT500 must interrupt the keying of the KPA500 when it needs
> to tune.
>
> 73,
> Don W3FPR
>
> On 12/29/2018 10:13 PM, Ken B wrote:
> > Thank you Don.
> > The pin 3 (send) did the trick perfectly. Now it works at 300 to
> 400
> > watts out with 20 in. The problem i have now is when i switch bands
> > the kat will not tune unless i remove all AC power from the amp.
> >
> >
> > Sent from Yahoo Mail on Android
> >
> <https://go.onelink.me/107872968?pid=InProduct&c=Global_Internal_YGrowth_AndroidEmailSig__AndroidUsers⁡_wl=ym⁡_sub1=Internal⁡_sub2=Global_YGrowth⁡_sub3=EmailSignature
> <https://go.onelink.me/107872968?pid=InProduct&c=Global_Internal_YGrowth_AndroidEmailSig__AndroidUsers&af_wl=ym&af_sub1=Internal&af_sub2=Global_YGrowth&af_sub3=EmailSignature>>
>
>
> >
> > On Thu, Dec 27, 2018 at 11:36 PM, Don Wilhelm
> > <[hidden email] <mailto:[hidden email]>> wrote:
> > Ken,
> >
> > Look at your Icom 7600 documentation. I believe the
> 'keyword' may be
> > "Send" or Keyout or something of that nature (PTT should be an
> > input to
> > the transceiver, not an output, but some manufacturers mix
> them up
> > causing confusion - check the documentation).
> > Connect that output from your transceiver first to the KAT500
> AMP KEY
> > connector and from the other KAT500 AMP KEY connector to the
> KPA500.
> > That allows the KAT500 to disable the amplifier keying if the
> KAT500
> > needs to tune.
> >
> > You should then be "good to go" with the basic cabling. When
> you get
> > the proper cable, it will integrate better with your Icom,
> but the
> > basic
> > cabling will get you on the air with your new toys.
> >
> > 73,
> > Don W3FPR
> >
> > On 12/27/2018 11:14 PM, Ken B via Elecraft wrote:
> > > Just received my the kap500 and found out it was missing the
> > accessory cable which goes from the icom 7600 to the kat500.
> > Elecraft is sending one but it might take a week. In the mean
> time
> > does anyone have the accessory pin outs to rca plug so i can make
> > one and use my new toy.
> > > Thank youKenKc1icn
> >
>

______________________________________________________________
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]

Elecraft mailing list

Re: KAT500/KPA500 with Icom 7600 accessory cable

In reply to this post by Elecraft mailing list

Thank you Jack
Will do it all today. Sunday after church and evening we preparing for the charity meal. We served 581 people and was to wiped to do anything yesterday.
Thank you Ken KC1ICN

From: Jack Brindle <[hidden email]>
To: Ken B <[hidden email]>
Cc: "[hidden email]" <[hidden email]>
Sent: Sunday, December 30, 2018 9:53 PM
Subject: Re: [Elecraft] KAT500/KPA500 with Icom 7600 accessory cable

Let’s take a step back and make sure the KAT500 and KPA500 work properly with RF sensing for a tune. Unplug the mini-phone plug from the KAT500. This will leave the KAT powered from the 7600, but requesting a tune from the 7600 won’t cause the KAT to respond. Next key the radio and make sure everything works properly. After that, change bands on the radio and re-key. Both the Kat and KPA will sense the new band and both should change. The KAT will further require a tune and should break the key line causing the KPA to drop out of transmit.
Try this test and let me know what happens.
Oh, and before I forget, there is actually no soldering involved in assembling either the KPA500 or the KAT500. They are both no-solder kits. But there are a lot of mechanical tasks such as screwing in small screws and tightening nuts. Having just assembled one of each of these, I can’t say I blame you for buying it factory-built.
73!Jack, W6FB

On Dec 30, 2018, at 6:30 PM, Ken B <[hidden email]> wrote:
Thank you - I followed Fig 3 on page 10 which is specific to ICOM. Yes all cables ohm'd out with no shorts

From: Jack Brindle <[hidden email]>
To: Ken B <[hidden email]>
Cc: "[hidden email]" <[hidden email]>
Sent: Sunday, December 30, 2018 8:28 PM
Subject: Re: [Elecraft] KAT500/KPA500 with Icom 7600 accessory cable

Great! Thanks for the detail. Table 2 on page 8 of the KAT500 manual should have given you the exact connections you needed to make for the Molex to KAT500 cable. Note that the plug o the KAt500 end is stereo with tip, ring and sleeve. Please recheck these connections to make sure that pin 4 of the Molex does indeed go to the sleeve of the mini-phone plug. It would be best to ohm out the cable to make sure the signals go to the right places and there are no shorts between pins.
Table 3 on that same page shows the Key-line connections, which I suspect are correct at the point. In any case be sure to check that cable as well.
73!Jack, W6FB

On Dec 30, 2018, at 4:13 PM, Ken B <[hidden email]> wrote:
Good evening  The Icom IC-7600 KAT500, and KPA500 are each grounded to a single terminal strip with a #10 cable directly to a ground rod 15 ft away. The rod is 12 ft deep. Both the KAP and KTA were factory built as my soldering skills have diminished since the Army training.

The IC7600 - In the back of the 7600 is a 4 conductor molex connector. The Icom made cable splits into 2 connections on the KAT, the first is plugged into DC power, and the second is plugged into the Tuner connection
- In the back of the 7600 is also a 7 conductor DIM connection (Acc2). I made a cable to connect pin 3 to the KAT PTT RLY

The KAT  - Other than mentioned above ant1 goes out to the antenna- XMTR is connected via a 2 ft piece of LMR400 to the output of the KAP- The unlabeled connector above the PTT RLY goes to the PA Key of the KAP

The KAP - Other than what is mentioned above the only other connection is a piece of LMR400 from Ant1 on the 7600 to input on the KAP.

From: Jack Brindle <[hidden email]>
To: "[hidden email]" <[hidden email]>
Cc: "[hidden email]" <[hidden email]>
Sent: Sunday, December 30, 2018 5:31 PM
Subject: Re: [Elecraft] KAT500/KPA500 with Icom 7600 accessory cable

Yeah, but we really want to get the problem solved so you can enjoy your KPA500 and KAT500 as much as we enjoy ours.That connection list will be most helpful in this effort.
My thinking on the ground issue is that the power-plug ground is completing a circuit that should not exist and thus disruptingoperations on band change. The question would be what is connected to ground that should not be, and where?Are the KPA and KATs kits or did they come assembled?
73!Jack, W6FB

On Dec 30, 2018, at 2:22 PM, Ken B <[hidden email]> wrote:
Please allow me to clairify. Everyone deserves time off. I work 60 to 70 hrs per week and appricate the down time
Sent from Yahoo Mail on Android

On Sun, Dec 30, 2018 at 5:07 PM, Jack Brindle<[hidden email]> wrote: The folks in Watsonville are taking a well deserved rest, but some of us are still around. This sounds a lot like a grounding issue in your setup with ground being completed through the wall power ground pin. Tell me exactly all of the cables/connections going to the KPA500 (and from where). While you are at it you might as well do the same for the KAT500. I’ll try to decipher what is going on from this information and hopefully get a good solution for you quickly.

73!
Jack, W6FB
Elecraft Engineering

Elecraft mailing list

Re: KAT500/KPA500 with Icom 7600 accessory cable

In reply to this post by Elecraft mailing list

Good morning Jack
To make things easier to read replies prefaced the KB>>>
Table 2 on page 8 of the KAT500 manual should have given you the exact connections you needed to make for the Molex to KAT500 cable. Note that the plug o the KAt500 end is stereo with tip, ring and sleeve. Please recheck these connections to make sure that pin 4 of the Molex does indeed go to the sleeve of the mini-phone plug. It would be best to ohm out the cable to make sure the signals go to the right places and there are no shorts between pins.KB>>> Ohm'd out each connector and confirm operation

Table 3 on that same page shows the Key-line connections, which I suspect are correct at the point. In any case be sure to check that cable as well.KB>>> Confirmed and Ohm'd each as well.
KB>>> One note - Took the KPA entirely out of the mix and all works as it should with the KAT working properly when I change bands
Thank you Ken
From: Jack Brindle <[hidden email]>
To: Ken B <[hidden email]>
Cc: "[hidden email]" <[hidden email]>
Sent: Sunday, December 30, 2018 8:28 PM
Subject: Re: [Elecraft] KAT500/KPA500 with Icom 7600 accessory cable

Great! Thanks for the detail. Table 2 on page 8 of the KAT500 manual should have given you the exact connections you needed to make for the Molex to KAT500 cable. Note that the plug o the KAt500 end is stereo with tip, ring and sleeve. Please recheck these connections to make sure that pin 4 of the Molex does indeed go to the sleeve of the mini-phone plug. It would be best to ohm out the cable to make sure the signals go to the right places and there are no shorts between pins.
Table 3 on that same page shows the Key-line connections, which I suspect are correct at the point. In any case be sure to check that cable as well.
73!Jack, W6FB

On Dec 30, 2018, at 4:13 PM, Ken B <[hidden email]> wrote:
Good evening  The Icom IC-7600 KAT500, and KPA500 are each grounded to a single terminal strip with a #10 cable directly to a ground rod 15 ft away. The rod is 12 ft deep. Both the KAP and KTA were factory built as my soldering skills have diminished since the Army training.

The IC7600 - In the back of the 7600 is a 4 conductor molex connector. The Icom made cable splits into 2 connections on the KAT, the first is plugged into DC power, and the second is plugged into the Tuner connection
- In the back of the 7600 is also a 7 conductor DIM connection (Acc2). I made a cable to connect pin 3 to the KAT PTT RLY

The KAT  - Other than mentioned above ant1 goes out to the antenna- XMTR is connected via a 2 ft piece of LMR400 to the output of the KAP- The unlabeled connector above the PTT RLY goes to the PA Key of the KAP

The KAP - Other than what is mentioned above the only other connection is a piece of LMR400 from Ant1 on the 7600 to input on the KAP.

From: Jack Brindle <[hidden email]>
To: "[hidden email]" <[hidden email]>
Cc: "[hidden email]" <[hidden email]>
Sent: Sunday, December 30, 2018 5:31 PM
Subject: Re: [Elecraft] KAT500/KPA500 with Icom 7600 accessory cable

Yeah, but we really want to get the problem solved so you can enjoy your KPA500 and KAT500 as much as we enjoy ours.That connection list will be most helpful in this effort.
My thinking on the ground issue is that the power-plug ground is completing a circuit that should not exist and thus disruptingoperations on band change. The question would be what is connected to ground that should not be, and where?Are the KPA and KATs kits or did they come assembled?
73!Jack, W6FB

On Dec 30, 2018, at 2:22 PM, Ken B <[hidden email]> wrote:
Please allow me to clairify. Everyone deserves time off. I work 60 to 70 hrs per week and appricate the down time
Sent from Yahoo Mail on Android

On Sun, Dec 30, 2018 at 5:07 PM, Jack Brindle<[hidden email]> wrote: The folks in Watsonville are taking a well deserved rest, but some of us are still around. This sounds a lot like a grounding issue in your setup with ground being completed through the wall power ground pin. Tell me exactly all of the cables/connections going to the KPA500 (and from where). While you are at it you might as well do the same for the KAT500. I’ll try to decipher what is going on from this information and hopefully get a good solution for you quickly.

73!
Jack, W6FB
Elecraft Engineering

Elecraft mailing list

Re: KAT500/KPA500 with Icom 7600 accessory cable

In reply to this post by Elecraft mailing list

To make it easier to read replies prefaced with KB>>>
Unplug the mini-phone plug from the KAT500. This will leave the KAT powered from the 7600, but requesting a tune from the 7600 won’t cause the KAT to respond. KB>>> Worked as planned
Next key the radio and make sure everything works properly. KB>>> Worked as planned
After that, change bands on the radio and re-key. Both the Kat and KPA will sense the new band and both should change. KB>>> Did not work as planned, KPA did not sense me changing from 80 mtr to 20
The KAT will further require a tune and should break the key line causing the KPA to drop out of transmit. KB>>> Did not occur - kept output of 480 Watts

From: Jack Brindle <[hidden email]>
To: Ken B <[hidden email]>
Cc: "[hidden email]" <[hidden email]>
Sent: Sunday, December 30, 2018 9:53 PM
Subject: Re: [Elecraft] KAT500/KPA500 with Icom 7600 accessory cable

Let’s take a step back and make sure the KAT500 and KPA500 work properly with RF sensing for a tune. Unplug the mini-phone plug from the KAT500. This will leave the KAT powered from the 7600, but requesting a tune from the 7600 won’t cause the KAT to respond. Next key the radio and make sure everything works properly. After that, change bands on the radio and re-key. Both the Kat and KPA will sense the new band and both should change. The KAT will further require a tune and should break the key line causing the KPA to drop out of transmit.
Try this test and let me know what happens.
Oh, and before I forget, there is actually no soldering involved in assembling either the KPA500 or the KAT500. They are both no-solder kits. But there are a lot of mechanical tasks such as screwing in small screws and tightening nuts. Having just assembled one of each of these, I can’t say I blame you for buying it factory-built.
73!Jack, W6FB

On Dec 30, 2018, at 6:30 PM, Ken B <[hidden email]> wrote:
Thank you - I followed Fig 3 on page 10 which is specific to ICOM. Yes all cables ohm'd out with no shorts

From: Jack Brindle <[hidden email]>
To: Ken B <[hidden email]>
Cc: "[hidden email]" <[hidden email]>
Sent: Sunday, December 30, 2018 8:28 PM
Subject: Re: [Elecraft] KAT500/KPA500 with Icom 7600 accessory cable

Great! Thanks for the detail. Table 2 on page 8 of the KAT500 manual should have given you the exact connections you needed to make for the Molex to KAT500 cable. Note that the plug o the KAt500 end is stereo with tip, ring and sleeve. Please recheck these connections to make sure that pin 4 of the Molex does indeed go to the sleeve of the mini-phone plug. It would be best to ohm out the cable to make sure the signals go to the right places and there are no shorts between pins.
Table 3 on that same page shows the Key-line connections, which I suspect are correct at the point. In any case be sure to check that cable as well.
73!Jack, W6FB

On Dec 30, 2018, at 4:13 PM, Ken B <[hidden email]> wrote:
Good evening  The Icom IC-7600 KAT500, and KPA500 are each grounded to a single terminal strip with a #10 cable directly to a ground rod 15 ft away. The rod is 12 ft deep. Both the KAP and KTA were factory built as my soldering skills have diminished since the Army training.

The IC7600 - In the back of the 7600 is a 4 conductor molex connector. The Icom made cable splits into 2 connections on the KAT, the first is plugged into DC power, and the second is plugged into the Tuner connection
- In the back of the 7600 is also a 7 conductor DIM connection (Acc2). I made a cable to connect pin 3 to the KAT PTT RLY

The KAT  - Other than mentioned above ant1 goes out to the antenna- XMTR is connected via a 2 ft piece of LMR400 to the output of the KAP- The unlabeled connector above the PTT RLY goes to the PA Key of the KAP

The KAP - Other than what is mentioned above the only other connection is a piece of LMR400 from Ant1 on the 7600 to input on the KAP.

From: Jack Brindle <[hidden email]>
To: "[hidden email]" <[hidden email]>
Cc: "[hidden email]" <[hidden email]>
Sent: Sunday, December 30, 2018 5:31 PM
Subject: Re: [Elecraft] KAT500/KPA500 with Icom 7600 accessory cable

Yeah, but we really want to get the problem solved so you can enjoy your KPA500 and KAT500 as much as we enjoy ours.That connection list will be most helpful in this effort.
My thinking on the ground issue is that the power-plug ground is completing a circuit that should not exist and thus disruptingoperations on band change. The question would be what is connected to ground that should not be, and where?Are the KPA and KATs kits or did they come assembled?
73!Jack, W6FB

On Dec 30, 2018, at 2:22 PM, Ken B <[hidden email]> wrote:
Please allow me to clairify. Everyone deserves time off. I work 60 to 70 hrs per week and appricate the down time
Sent from Yahoo Mail on Android

On Sun, Dec 30, 2018 at 5:07 PM, Jack Brindle<[hidden email]> wrote: The folks in Watsonville are taking a well deserved rest, but some of us are still around. This sounds a lot like a grounding issue in your setup with ground being completed through the wall power ground pin. Tell me exactly all of the cables/connections going to the KPA500 (and from where). While you are at it you might as well do the same for the KAT500. I’ll try to decipher what is going on from this information and hopefully get a good solution for you quickly.

73!
Jack, W6FB
Elecraft Engineering

123