[Elecraft] K2 40 meter IF band pass alignment

Matt Osborn kc0ukk at msosborn.com
Fri Jun 17 17:58:59 EDT 2005


Thanks, Don.  I've checked the capacitors and they are all correct
(doesn't mean I didn't cook one though).

I've ordered the N-Gen noise generator and the XG-1 oscillator from
Elecraft.  Looks like I'll get a chance to work with Spectrogram and
see what the signals look like.

The Marines trained me as a ground radio repairman back in '65, then
sent me off to an artillery outfit where I mostly drove a truck.  So
I'm afraid that I know enough to be dangerous, but it's a real blast
getting back into this stuff after 40 years.

Well, back to the schematics...


On Fri, 17 Jun 2005 09:04:01 -0400, "W3FPR - Don Wilhelm"
<w3fpr at earthlink.net> wrote:

>Matt,
>
>If tuning L1 and L2 do not procuce peaks within about 3 turns from the top
>there is something wrong.  The most probable thing is that the capacitors in
>the bandpass circuit are the wrong value.  Check C5 and C7 (100 pf - 101),
>C4 and C8 (820 pf - 821) and C6 (4.7 pf).  My first guess is that you may
>have the 82 pf (marked 820) capacitors in the C4 and C8 positions.
>
>73,
>Don W3FPR
>
>> -----Original Message-----
>
>>
>> Adjusting L1 and L2, however,  continues to improve the signal level
>> until the slug is bottomed out.  This doesn't seem right.
>>
>> I don't have a signal generator, so I'm picking up signals using 15ft
>> of solid core hookup wire at around 7130kz.
>>
>> Any ideas of where I should look?
>>



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