[TenTec] Centurion Amp - early model, looking for advice

[Jim Brown]

On Thu,5/26/2016 5:15 PM, kr2q at optimum.net wrote:
> The idle current does NOT change between standby and operate.  It is over 100 mils
> (just under the "second line" on the meter or almost 2/3rds of .2 amps.)

I don't have one of these amps, but I do have three Titans. Ten Tec (and 
probably most mfrs) develop bias from the low voltage supply (28VDC in 
the Titans), and both LV and HV supplies are turned on by the main power 
switch. The Standby/Operate switch, combined with other logic (including 
the TX control line from the transceiver), puts the amp in TX mode.

Bottom line -- I agree that some component failure is likely the cause 
of the high idle current. Ten Tec used to publish schematics of their 
gear. Don't know if they did for this amp. I've put a 99% version of the 
Titan schematic on my website. k9yc.com

73, Jim K9YC