John,
If the other 1SV149 varactors are not behaving correctly, it will show
up in your IF filter passband.
Download Spectrogram from my website www.w3fpr.com (or use Spectrum Lab
or ohters) and feed the K1 audio output to your soundcard.
I understand that you may not know what to expect, so send me
screenshots of the passband for FL1, FL2 and FL3 and I can let you know
if they are as expected.
73,
Don W3FPR
On 2/24/2013 7:31 PM, John Reed, W8DE wrote:
Don,
thanks so much for your advice. The board traces in that area all check out
good. I'll email a request to elecraft for a new D3.
If it really is bad, it makes me wonder about the 1SV149 diodes in the crystal
filter circuit. I don't know how I would tell if those are functioning
correctly.
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