[Elecraft] 160M Dead on my K2

[Don Wilhelm]

Mark,

Well, if relay K1 does not switch, you will not have any output on 160
meters - but you also said that it does not receive on the Rx antenna
either - so relay K2 must not be working either.  That combination would
point to something wrong in the relay coil circuits.  Check all the
soldering on pins 3, 4, and 16 of J1 and check the soldering on the header
as well (that will likely require removing the heat sink from the K2.  Also
check pin 1 of the header and J1 (that is the signal path for the RX
antenna).  Check the soldering on the K160RX board at the relay pins too.

You are probably looking for an unsoldered connection, or one that was not
adequately heated.  These connections can often work initially but develop
enough oxidation to give trouble after a year or so.

73,
Don W3FPR

> -----Original Message-----
>
> I couldn't wait to attack the 160 test with my K2. I switched to top
> band at the appointed time and heard..... nothing! So here's the deal.
>
>
> My K2 is QRP, SN543 with all modules less the DSP. The 160 did work
> when I last used it 3 years ago. The RX antenna likewise does nothing.
> I pulled the board to look for problems and it looks FB. I tried
> transmitting to a dummy load and the display reads LoP. Everything else
> in the radio functions to spec. The 80/160 BP filters are tuned up
> nicely for 80M. When I change bands from 80 - 160, I don't feel or hear
> any operation from relay K1 on the 160 module. Ideas??
>
> 73,
> Mark K2QO/R and QRP
>
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