KBPF3 and KPA500

[Jim Leder (Hotmail)]

 I installed a KBPF3 option, and it works OK, mostly. I also have a PR6, so I am trying to use the BYPASS connector of the PR6. I have pulled the jumper in the PR6, so the BYPASS would would work. And it does, as long as my KPA500 cable is disconnected. When I connect the KPA500 control cable, it seems power is ALWAYS applied to the PR6, rendering the BYPASS not connected. DIGIOUT1 is off on all bands, except 6. When I disconnect the KPA500 control cable, all works as it should (except the KPA500). What am I missing?


     Jim Bob Buckeye
            AKA
  **** Jim Leder****
    K8CXM since 1961
 IBM retiree since 1999
 
There are 10 types of people in this world -- those who understand binary
and those who don't.

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[Richard Ferch]

As I understand it, the way the PR6 uses the DIGOUT1 connection (pin 11)
and the way the KPA500 uses the same connection are physically
incompatible with one another.

The solution is apparently to break the connection on pin 11 to the
KPA500 - see
<http://elecraft.365791.n2.nabble.com/KPA500-PR6-AUX-Cable-Pin-11-td7558085.html>
.

I believe that if you wanted to use the KPA500's INHIB IN feature, you
would have to connect the K3's pin 11 to the KPA500, install jumper P2
in the PR6 and disconnect the control connection from the PR6 to pin 11,
thus disabling its automatic bypass feature.

73,
Rich VE3KI


K8CXM wrote:

> I installed a KBPF3 option, and it works OK, mostly. I also have a
PR6, so I am trying to use the BYPASS connector of the PR6. I have
pulled the jumper in the PR6, so the BYPASS would would work. And it
does, as long as my KPA500 cable is disconnected. When I connect the
KPA500 control cable, it seems power is ALWAYS applied to the PR6,
rendering the BYPASS not connected. DIGIOUT1 is off on all bands,
except 6. When I disconnect the KPA500 control cable, all works as it
should (except the KPA500). What am I missing?
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[Cady, Fred]

Hi Jim,
This has been mentioned a couple of times with some good trouble shooting by somebody last month (I didn't save the email and couldn't track it down in the "searchable" archives).
What he found was there is a connection in the KAT500 that was pulling the DIGOUT1 signal low and keeping the PR6 turned on all the time. A couple of fix suggestions were made including removing R63 in the KAT500 or clipping pin-11 in the TX Keying line interrupter (if you are using it). You could also get another DE15HD gender changer and clip pin-11 in it and still maintain the amp keying line in the KPAK3AUX cable. Or you can just activate the PR6 when you want to by supplying it 12V power.
You may want to contact Elecraft Customer Service about the advisability of removing R63 or other solutions they may have found.

Cheers,
Fred KE7X

Fred Cady
"The Elecraft K3: Design, Configuration and Operation 2nd ed"
"The Elecraft KX3 - Going for the summit"
www.ke7x.com or www.lulu.com
(Working on "The Elecraft K-Line: KPA500 and KAT500")

fcady at ieee dot org

> -----Original Message-----
> From: [hidden email] [mailto:elecraft-
> [hidden email]] On Behalf Of Jim Leder (Hotmail)
> Sent: Friday, September 13, 2013 4:06 PM
> To: Elecraft
> Subject: [Elecraft] KBPF3 and KPA500
>
>
>  I installed a KBPF3 option, and it works OK, mostly. I also have a
> PR6, so I am trying to use the BYPASS connector of the PR6. I have
> pulled the jumper in the PR6, so the BYPASS would would work. And it
> does, as long as my KPA500 cable is disconnected. When I connect the
> KPA500 control cable, it seems power is ALWAYS applied to the PR6,
> rendering the BYPASS not connected. DIGIOUT1 is off on all bands,
> except 6. When I disconnect the KPA500 control cable, all works as it
> should (except the KPA500). What am I missing?
>
>
>      Jim Bob Buckeye
>             AKA
>   **** Jim Leder****
>     K8CXM since 1961
>  IBM retiree since 1999
>
> There are 10 types of people in this world -- those who understand
> binary
> and those who don't.
>
> ______________________________________________________________
> 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

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