Key in K3 not working

[crmabbott]

Have you tried a different key?

While slim chance it is that simple might be worth a try before you
tear into the radio?

73  Chuck AA8VS


Here's what I did now to rule out the actual K3 jack:

I took the rear bottom panel off.  I checked continuity with a plug
connected to the socket.  I touched ground on the plug and G on the RF main
board and that passed.  Did the same with ring R, and tip T, and all
passed.  So there doesn't appear to be anything wrong with the contacts
inside the jack itself.

Strange...
--
73 de James K2QI
President UNARC/4U1UN


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[K2QI]

Hi Chuck,

I didn't have another paddle to try, but all of my testing has shown that
choke RFC4 was to blame.  It's wide open with no continuity.  I have since
bypassed the choke with a piece of wire and now everything works properly.
I'm still waiting to hear back from Dale whether or not he will send me a
replacement choke, or if I should just send the K3 back to Aptos.

Here's a pic of my "mod"
http://jamespaulsarte.com/temp/k2qi/k3_rfc4_jumper.jpg

73,
James K2QI
On Sun, Nov 14, 2010 at 2:15 PM, Chuck Mabbott <[hidden email]>wrote:

> Have you tried a different key?
>
> While slim chance it is that simple might be worth a try before you
> tear into the radio?
>
> 73  Chuck AA8VS
>
>
> Here's what I did now to rule out the actual K3 jack:
>
> I took the rear bottom panel off.  I checked continuity with a plug
> connected to the socket.  I touched ground on the plug and G on the RF main
> board and that passed.  Did the same with ring R, and tip T, and all
> passed.  So there doesn't appear to be anything wrong with the contacts
> inside the jack itself.
>
> Strange...
> --
> 73 de James K2QI
> President UNARC/4U1UN
>
>
> ______________________________________________________________
> 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
>

--
73 de James K2QI
President UNARC/4U1UN
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