[Elecraft] 20 meter problem on new K2

[W3FPR - Don Wilhelm]

Rich,

If you obtained a peak, you should have similar sensitivity on 20 meters as 
you have on 40 meters - unless you have a problem in the lowpass filter 
area.  As a test, connect the antenna to the W1 jumper (or the W6 jumper) to 
bypass the LPF.  If the signal level increases, you will find the cause in 
the LPF.

The same LPF is used by both 30 and 20 meters, so a LPF soldering problem on 
20 meters should show up on 30 too.  About the only thing that would cause 
OK behavior for 30 and bad behavior for 20 would be incorrect component 
values making the cutoff frequency too low.  Check the turns on L18, L19 and 
L20 (re-check the core type too) and check capacitors C197 thru C203 for 
correct values.

73,
Don W3FPR

----- Original Message ----- 

> Yes, I remember reading about seating the caps. So I gave those two about 
> 20 spins and did not help.
>
> The  radio seems to peak OK going through the alignment. Just seems to 
> have no sensitivity. I just pulled out a TenTec RX-320 and a S-9 singal on 
> the TenTec is only a single bar on the K2. I have to crank the audio 
> almost all the way up to listen as well.
>
> I doubt in my case it is tinning problems. I am prone to do stupid things 
> but I am pretty good with solder and removing the enamel on the wire. NOT 
> to say it isnt possible.
>
> I am surprised I did not notice this before but as I said, I am never on 
> 20. Its a significant difference in audio as you switch to 20.
>
> Just to be safe I will check "trace to trace" on the circuit board to make 
> sure the torroids are making good contact :)
>