[Amps] Input Impedance Question?

[Douglas R Snowden]

>From practical experience what sort of input impedance could
I expect to see with a pair of Russian GI7B's in GG?  I expect
I would tune the input anyway.  Also, I saw a bias circuit using
a transistor and some zeners in the base circuit. Is this so you can
use lower wattage zeners ?

Doug,
N4IJ



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