[Amps] TL922 failure

Victor Rosenthal 4X6GP k2vco.vic at gmail.com
Fri May 13 03:02:22 EDT 2022

After about 10 years of almost daily use, my TL922 has failed.
When I turn it on, the GFI for my radio room immediately -- instantly -- 

An ohmmeter from either line pin on the power plug to the ground pin 
shows a resistance of 1.2k. I presume that explains the GFI's reaction!
The resistance across the line pins (it is wired for 230v) is 27 ohms, 
which I think is normal.

The schematic shows a couple of 470pf capacitors from line to ground. It 
looks like it's either this or the transformer.

I haven't removed the amp from my desk and opened it yet, but does 
anyone have an experience with a similar problem?
Victor, 4X6GP
Rehovot, Israel
Formerly K2VCO
CWops no. 5

More information about the Amps mailing list