[AMPS] bias

[Rich Measures]

>I forgot to mention that either a three tone test with two of the tones
>close together (as, I believe, advocated by W8JI) or a 2 tone test with
>close tone spacing (<25Hz) really shows up some of the problems in power
>supplies and bias supplies for solid state as well as tube amplifiers.
>
Anode supplies, yes.  However, for a typical grid-driven linear 
amplifier, virtually zero current is drawn from the bias supply.  And for 
a typical cathode-driven linear amplifier,  bias potential comes from a 
string of forward-biased silicon rectifiers, or from a Zener diode in 
series with the negative HV return.  Thus, there is no bias supply per 
se.  
Rich--

R. L. Measures, 805-386-3734, AG6K   


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