On Fri,2/3/2017 10:27 AM, Robert Paluf wrote:
I am now the new owner of an older TenTec Titan HF amplifier, model 425.
These are very nice amps. I own three of them -- two in my SO2R
contesting station and the third a standby. Two of the amps came to me
with problems that I had to fix. The schematics in the manual are a bit
hard to follow, because interconnected circuitry is split between
multiple pages. To make troubleshooting easier, I drew the almost the
entire schematic (omitting RF details in the output stage) in AutoCad
and made a pdf of it. It's here. http://k9yc.com/Titan.pdf There are
also single-page sized pdf files of sections of the schematic for easy
printing. k9yc.com/publish.htm
It's OK to run the amp with one tube at a time to assess their
condition. The tuning changes only slightly.
73, Jim K9YC
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