Gary:
>Mine only goes from 10.118 to 10.120. I tried
>several different 1N4001s and a MV209 varactor...
>Anybody else having these problems
>with limited VXO tuning range?
I have had a fair bit of trouble with my 38 Special - including poor tuning
range. Much like yours, the crystal that came with the kit would only tune a
couple kHz. I bought a few from Mouser that are on the same frequency and
they swing much, much better. I've also seen a great variation among 1N4004
diodes. I've tried a couple unknowns, several each of GE and Motorola
manufacture, and found every one better than what was packed in the kit. I
settled on a Motorola 1N4004.
>I'm also having no luck with the RIT mod
I had to really concentrate on the instructions for adding the RIT -- I kept
getting confused. Maybe you are in the same boat.
Adding the RIT mod to my 38 Special seems OK on receive but caused extreme
drift and instability during transmit - I suspect RFI to D301/302. I'm
trying to work out a different circuit for transmit/receive RIT switching
right now.
Steve Johnston
WD8DAS
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