[Amps] CB etc Amps

Peter Chadwick g3rzp at g3rzp.wanadoo.co.uk
Wed Oct 10 17:01:34 EDT 2007


Tom said:
>I'd stay far away from bipolar transistors, especially at 
high power, in a home station.<
Taken out of context, this statement can cause trouble. There are places where bi-polar transistors have advantages, but high power ( >+30 to 40 dBm or more) RF amps isn't one of them.
There's some argument about low phase noise oscillators: with an unbypassed emitter resistor, they can do very well, because they don't have the 1/f noise inherent in FETs, especially in GaAsFETs. They certainly have advantages in mixers in direct conversion receivers.

73
Peter G3RZP


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