[Elecraft] K3 keying the KPA-500 & transverter

[Oliver "Olli" Dröse]

Hi Toby,

if my memory serves me right (digged into the schematics about 7-8 month' ago 
when I had a problem with one of the key-out jacks) this will never work as both 
key-out pins share the same circuitry. It's just different "final" switching 
transistors (and thus different loads possible) that distinguish both.

A solution around this could be the band specific PTT solution of WW2R/G4FRE 
(http://g4fre.com/K3_PTT_sw.htm) or something similar. The key is to use DIGOUT0 
or DIGOUT1 to control external switching. It can be configured per band.

73 & gl, Olli - DH8BQA



----- Original Message ----- 
From: <dj7mgq at muenchen-mail.de>
To: <elecraft at mailman.qth.net>
Sent: Monday, April 11, 2011 10:33 AM
Subject: [Elecraft] K3 keying the KPA-500 & transverter


> Hi,
>
> I plan on using my K3 with the KPA-500 and my Kuhne 144 MHz transverter.
>
> I would like to use the ACC (pin 10) Key-Out for the KPA-500 and the
> RCA/Phono Key-Out jack for the transverter. This, I assume, should not
> cause any problems.
>
> It would be a nice (sometime in the future) feature if it was possible
> to activate/deactivate operation of the two Key-Out signals depending
> upon which band one is currently operating on. In my case, the ACC
> Key-Out would be active from 160m to 6m and on 2m the RCA/Phone Key-Out.
>
> Or am I overlooking something?
>
> vy 73 de toby, DD5FZ
>
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