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Old May 22nd 06, 11:44 PM posted to rec.radio.cb
JSF
 
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Default SkyWave 2879AB Amplifier


"Lancer" wrote in message
m...
Telstar Electronics wrote:

JSF... you're right about those "big amps". They are nothing but
hay-wired prototypes, mostly designed and constructed by persons having
no electronic background. I have looked at many of them over the years
and have found that they have major flaws such as inadequate cooling,
improper tuning, and instabilities/oscillations caused by improper
layout and long wires running around all over inside. Because of these
issues, their owners must keep a steady stream of expensive output
transistors flowing through them... if you know what I mean... LOL

www.telstar-electronics.com


Kind of like building an amp and running it with class C bias?

You know what that means?


I think some of those Amps are getting close to class D now, they drive 250
Watt amps with 5 watts in to a 50 watt driver 10- 13 DB gain then a pair of
finals with 10-13 DB of gain, no bias on the base , I can just see the crap
the poor transistors go through. Then they mod their radios to give SWING
which does nothing but make the wattmeter swing like SSB but their no
louder, but I will say it helps keep the poor finals cooler.

In the new Commerical Broadcast AM transmitters their Audio is Class D audio
amps driving the finals saving allot of AC power.