[Elecraft] K2 - Stumble at the last hurdle.

[Don Wilhelm]

Mark,

Did you measure C44 and C46 through the entire range of rotation? and 
what is the color of the plastic bodies?
The last I knew, they were about 20pF maximum and the bodies were red.  
The others do not have a sufficiently low capacity to tune 12 meters.

Similarly for C21 and C23 which the last I knew were yellow or brown.

If those capacitor pairs are swapped, you would have the problems you 
describe.

73,
Don W3FPR

On 11/11/2021 5:30 AM, M Bak wrote:
> This is my 2nd K2 build this year. This fantastic kit has kept me sane.   I
> tested every component on an LCR meter (found RFC10 open) and tried to work
> as slowly as possible.
>
> I got to the end of the build to the very last alignment step.--
>
> The adjustment of C44 and C46 for the 12 meter band and I can only get
> 0.2W. 10 meters is fine with adjusting L12 and L13 but 12 meters (which I
> do not use but it should work) is nada.
>
> I had the exact same problem on 20meters but careful tweaking of C21/23 and
> L8/9 and it burst into life.
>
> When testing the capacitors I noticed they had quite a wide tolerance
> range. Could the band pass range for the 10 and 12 meter bands be too high?
>
> Any ideas would be appreciated. I am quite good at wondering down rabbit
> holes.
>
> Rgds. Mark G4RUR
>
>
>