connection among K3, KPA500 and KAT500

[Johnny Siu]

Hello Elecrafters,
 
I notice there have been discussions about the above in this forum.
 
If I only have ONE KPAK3AUX cable, should I connect it between KAT500 and K3?  The connection between KPA500 and KAT500 is just a RCA cable for PTT.
 
Any ideas?

TNX & 73,


Johnny VR2XMC
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[Dick Dievendorff]

We just put a new cable order item onto the order page yesterday.  

You may want to consider the E850468 "Optional KAT500 to KPA500 Cable". It
will also work as a K3 to KAT500 cable.  It doesn't include the Y or Tx line
keying adapter that are included in the KPAK3AUX cable set.

http://www.elecraft.com/elecraft_prod_list.htm#kat500  You may need to
refresh your browser cache if you have a cached older copy of the Elecraft
order page.

You can't use one 15-pin acc cable from K3 to KAT500  and then an RCA cable
from KAT500 to the amplifier.  The RCA key line path uses a separate relay
pole from the key line in the 15-pin cable.  For the K3 to KAT500 to KPA500,
you'll probably want two of the 15-pin cables so that the K3 is aware of the
KPA500.

73 de Dick, K6KR



-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of Johnny Siu
Sent: Tuesday, October 09, 2012 1:14 AM
To: Elecraft
Subject: [Elecraft] connection among K3, KPA500 and KAT500

Hello Elecrafters,
 
I notice there have been discussions about the above in this forum.
 
If I only have ONE KPAK3AUX cable, should I connect it between KAT500 and
K3?  The connection between KPA500 and KAT500 is just a RCA cable for PTT.
 
Any ideas?

TNX & 73,


Johnny VR2XMC
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[Richard Ferch]

Johnny,

I don't believe that will work. According to Dick K6KR: "For amplifier
key line interrupt, you should use two 15-pin cables, or two RCA cables
(radio to ATU, ATU to amplifier). But you can't use one of each. The RCA
connectors and 15-pin ACC cables use different poles of a double pole
amplifier key line interrupt relay." (see
<http://www.mail-archive.com/elecraft@.../msg144163.html>
for Dick's full message, which has other useful information about this
topic).

73,
Rich VE3KI


VR2XMC wrote:

> If I only have ONE KPAK3AUX cable, should I connect it between KAT500 and K3?
> The connection between KPA500 and KAT500 is just a RCA cable for PTT.

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