I started out my ham "career" with a Tecraft 10 watt output 144 MHz
transmitter. It used a 6360 PA. I think the model # was TR-20. I lost track of
it over the years, but then found it again a few years ago! A VHFer in Western
New York, WB2BYP, had it and he said he bought it from my brother years ago. He
was selling it to clean out his shack and gave it back to me. Anyway, it has
been sitting in a corner gathering dust but I recently fired it up but am
having trouble with it. I am afraid that the coil slugs have aged so much that
it does not tune properly anymore. To make matters worse, my old grdi dip
oscillator is missing its 100-250 MHz coil. Does anyone remember the
multiplication factors on this guy? It has a 6AU6 oscillator, a 5763 buffer, a
5763 multiplier and a straight thru 6360 push pull PA. I thought it went to 24
MHz in the 6AU6, then tripled to 72 MHz in the first 5763, followed by a 5763
doubler to 144 at the 6360 grid. My problem is that the first 5763 has 48
MHz output, and the 2nd 5763 tunes with the plates fully meshed, The 6360
gets drive, but the butterfly cap plates are fully meshed and I see about 300
milliwatts output. It obviously is having some problems. I sure wish I had my
grid dip meter working. Before I tear into it, I wanted the correct info on the
stage mult factors. Anyone have any data or recollections? My next quest will
be to get WAS on 144 AM. (Only kidding!) I do want to put it on the air and run
it with the same old yagi just for kicks. This proves that I am now a certified
old coot.
Dave K1WHS
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