[Elecraft] Need help with K2 capacitor

[Don Wilhelm]

Floyd,
I trust you are interpreting the value marks on the capacitors correctly -
47 pf would be marked as either '47' or '470', a 470 pf capacitor would be
marked '471'.  I have trouble believing that the builder went out and
purchased 470 pf capacitors to put into all those locations.

Low 20 meter output can many times be attributed to the variable capacitors
in the bandpass filter (C21 and C23).  Try spinning them several rotations
(10 or 12) and then re-do the 20 meter alignment just to be certain that is
not the problem.  Also, be aware that some have run out of range on these
capacitors - the A to B instructions point this out and have you solder 12
pf capacitors on the battom of the board in parallel with C21 and C23.  If
you fall into this 'out of adjustment range' category, the parallel
capacitors may be your answer.

73,
Don W3FPR

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

> I'm going through my K2 with the magnifiers on, checking on the components
> in the low-pass filter sections trying to resolve a low output problem (K2
> #1987 built by previous owner).  In the 30/20 meter filter (two of the
bands
> with a problem), I find that C203 should be 47 pf according to the
> schematic, but there's a 470 pf installed.  In the component parts list
for
> the RF board, C20, C24, C73, and C203 are all identified as 47 pf, but the
> builder penciled in 470 in the description area and I find that 470s are
> installed in all those positions.  Can anyone tell me if that was a
> production change or were the wrong values installed in my rig?  Many
thanks
> for any help you can provide.
>