[Amps] TenTec 425 Plate Current at Standby

[Jim Brown]

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