That idle current is fine for 1 tube and the voltage drop is excessive.
Start by measuring the grid chokes for an open or looking for color on both
plates.
Carl
KM1H
----- Original Message -----
From: "Tom Prohigh" <tomp@prohigh.com>
To: <amps@contesting.com>
Sent: Friday, February 12, 2010 9:47 AM
Subject: [Amps] TL-922 voltage / bias
>I have recently aquired a TL-922. It is on a stiff 240V line which
>actually
> measures 245V. No load voltage on CW is 2200 and on SSB is 3100. Under
> full load the CW drops to 1900V @ 600ma and the SSB drops to 2400V @
> 800ma.
> Is there really suppose to be this much drop? It has the original 200uf
> caps in it and I was thinking about replacing them with 560uf units. Also
> the grid bias on CW is 60ma and on SSB 120ma which seems a little low.
>
>
> thanks
>
> Tom - AB3FL
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