[Amps] TL922A

[Bill Fuqua]

I agree that is about right.  It was rated at 2000 watts PEP plate input 
and with 60%or 65% efficiency you get 1200 or 1300 watts output. The 
initial limitations of power output are in the power supply. The under load 
B+ is only 2.2kV and the plate transformer is rather small.  Secondly is 
that the plate circuit components, primarily the capacitors, may not take 
well to higher RF plate voltages if you do increase the B+ value to 3kV or so.

  At 06:48 AM 4/3/2006 +0000, Marc Wullaert wrote:
>1200-1300watts  output seems to me that the amp and tubes are in a
>goodshape.
>
>on4ma   ( OT4T vanity callsign )
>
>----- Original Message -----
>From: "Dan Hearn" <dhearn at wwnw.net>
>To: "amps" <amps at contesting.com>
>Sent: Sunday, April 02, 2006 7:16 PM
>Subject: [Amps] TL922A
>
>
> > Thanks to all who responded to my question about the resistor in the
> > parasitic suppressors for this amp. I was able to look into one of the
>amps
> > and found 2ea 47 ohm 1 watt resistors in parallel inside each of the
> > parasitic chokes. Close inspection of the soldering leads me to believe
>they
> > are the original factory jobs and not replacements. I was not at liberty
>to
> > unsolder them to check their value but they appear to not have been
> > overheated and the amp is stable. The tubes are rather old and max output
>is
> > about 1200-1300 watts.
> >   I don't believe there is room inside the chokes for two 2watt resistors
>in
> > parallel. I think the 2 parallel 1 watt resistors might run cooler than a
> > single 2 watt job in this spot.
> > 73, Dan, N5AR
> >
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