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[Amps] increasing rf gain in driver stages ?

To: amps <amps@contesting.com>
Subject: [Amps] increasing rf gain in driver stages ?
From: Dan Sawyer <dansawyer@earthlink.net>
Date: Wed, 15 Mar 2006 18:59:31 -0800
List-post: <mailto:amps@contesting.com>
All,

I have an older transistor based transceiver. I have separated the 
circuit and substituted an external signal generator in place of the 
internal circuit. The circuit drives a mixer, by varying the amplitude 
the mixer performs better with about a 4x increase in drive.

My question is: what is the best way to increase the output of an 
amplifier stage?

Is it as simple choosing a transistor with a higher beta?

There are two nearly identical stages. Both are NPN, the collector bias 
is a resistor - inductor in series and the emitter circuit is a 
capacitor - resistor in parallel.  Would reducing the resistor values 
increase gain?

If this question is too general - where is a good source for reading 
about stage gain variables?

Thanks - Dan
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