[K3] No Power out, no sigs in

[Martin]

Elecrafters,
i'm on vacation at a /p qth and K3 #2878 has quit working.
I have no power out. The display reads 0.0 watts when holding the tune
button, regardless of mode.
In RX I hear noise from the headphones , but no signals. The noise
sounds like the K3 sounds when no antenna is attached.

I attached my antenna to RX-IN , no joy
Also no signals on SUB-RX.

The only measurement gear i have right now is an ohmmeter and a powermeter.
I have no programming cable right now.

I should have mentioned that i had power out briefly. but the cable of
the headphones was very close to the ladderline , in fact touched it,
when i checked match by holding TUNE.

Any advice what to check?

--

73, Martin

Ohne CW ist es nur CB...
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[geoff allsup]

I had similar trouble related to the synthesizer boards on a K3. On the newer KSYN3A boards there is a green LED on the top edge of the board that should be ON if the board is working ok. You mentioned a sub RX so you should have two of these boards mounted against the back of the front panel.  

In any case, if the main KSYN3 board dies, everything acts as you've described. If the sub RX KSYN3 board dies, only the sub RX is affected. So there is a chance you could swap the KSYN3 boards and bring the main K3 back to life at the expense of no sub RX.

Just a thought - bit of a pain to swap those boards.

Geoff - W1OH



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Geoff Allsup, W1OH       [hidden email] or [hidden email]
Senior Engineer                         Upper Ocean Processes Group
Woods Hole Oceanographic Institution            Woods Hole, MA

> On Apr 15, 2017, at 19:33, Martin <[hidden email]> wrote:
>
> Elecrafters,
> i'm on vacation at a /p qth and K3 #2878 has quit working.
> I have no power out. The display reads 0.0 watts when holding the tune button, regardless of mode.
> In RX I hear noise from the headphones , but no signals. The noise sounds like the K3 sounds when no antenna is attached.
>
> I attached my antenna to RX-IN , no joy
> Also no signals on SUB-RX.
>
> The only measurement gear i have right now is an ohmmeter and a powermeter.
> I have no programming cable right now.
>
> I should have mentioned that i had power out briefly. but the cable of the headphones was very close to the ladderline , in fact touched it, when i checked match by holding TUNE.
>
> Any advice what to check?
>
> --
>
> 73, Martin
>
> Ohne CW ist es nur CB...
> ______________________________________________________________
> 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]
>

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Help: http://mailman.qth.net/mmfaq.htm
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Please help support this email list: http://www.qsl.net/donate.html
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