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Old June 24th 18, 01:17 PM posted to rec.radio.amateur.boatanchors
Scott Dorsey Scott Dorsey is offline
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First recorded activity by RadioBanter: Jul 2006
Posts: 774
Default need info; linear using an 833A

wrote:

Thank you. I have been in the process of building an 833A amplifier for 20 =
meters and I do have it working but I sure would like to see another builde=
rs ideas. Mine is grid driven with about -90 volts on the grid. I get 800 w=
atts output with 3KV under load. I believe the plate current is just over 4=
00 mA and a grid current of just under 50 mA if I remember correctly while =
writing this with an efficiency of about 63% which I consider OK. I will tr=
y to locate this article and if I cannot find it may just purchase the 1980=
book from Ebay. 73 WA4QGA El Paso, TX


A lot of broadcast transmitters used the 833, and schematics for them should
be easy to find. Bauer 707, Gates BC1G are the first that come to mind.
Some others just uses 833s in the exciter deck to modulate larger finals.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."