I was having trouble earlier with my 38S tuning range - it was limited to 2
khz. After doing some parts replacements/substitutions, I came up with a
broader (20khz or so) range and thought all was well. Then I noticed that
the thing wouldn't work all the time at the low end of the band. When a LCR
meter came that I had ordered, I was horrified to find that the 10 uh choke
I had peeled a few turns off of was actually a 100uh choke, and I had it
pruned to about 40uh. I asked for a couple of replacement chokes for L1
(which came very quickly), and just as soon as I soldered them in, I was back
to a real nice sounding tone - but only 2KHZ ! I have replaced the diode,
parallelled the diode, put in a varactor, checked the voltage on the pot (0
to 8 volts), replaced the pot, and everything else I could think to do.
Still 2khz range! The only thing I haven't tried is replacing the crystal.
Any Ideas? The rest of the rig works great (the receiver is sensitive, the
transmit tunes to a pretty clean signal, etc.) It just won't tune more than
2khz with the 4.7 or 5.6 inductor.
73 de Jim (AD4KB@aol.com)
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