[Elecraft] K2: dead on 60m and 40m

[Don Wilhelm]

Stephen,

Add a capacitor to your antenna lead and use it to inject signals into 
the K2 (AKA Cheap and Dirty Signal Tracing) first at W1, then at pin 3 
or 5 of J13 (on the K60XV board), then at the cathode end of D6.  The 
first place you hear signals more or less of the proper strength will 
identify the area of difficulty.

If you hear signals at W1, the problem is in the Low Pass Filter
If you first hear signals at the D6 cathode, but they are very weak at 
pin 3 or 5 of the K60XV board, than the problem is either in the 
bandpass filter or on the K60XV board.  In this latter case, there is 
one more step - remove the K60XV and put the leads of a 4.7 pF (up to 10 
pF is OK for this test) into the outer holes of J15 and see if you hear 
normal 40 meter signals - if so, the bandpass filter is OK and the 
problem lies on the K60XV board (or it was not plugged in right).

73,
Don W3FPR

Stephen Prior wrote:
> I have not used the K2 in some time, and tonight I notice that both 60m and
> 40m sound dead (all signals are very weak) and I have no power output- I
> have not measured with an inline meter but there is nothing on the K2
> display.  All other bands seem fine.
>
> I have the KAT2 in CALS mode since I use an external autotuner and I can see
> the swr drop as I transmit on bands other than 60 or 40, but I (sometimes)
> get a Lo P warning when I hold in the tune button on 60 and 40m.
>
> I wonder if anyone has any bright ideas?  The K2 has sat in its travelling
> case for the past several weeks so has not seen any action, except that is,
> that I opened up the case to install a new sealed lead acid battery.  I have
> just re-opened it and cannot see anything I might have disturbed.
>
> Thanks
>
> Stephen G4SJP
>
>
>
>
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