Bill asks:
>What is the input impedance of the 6LQ6?
Under what conditions?
Class A, grounded grid, about 120 ohms ( in class A grounded grid, Rin =
1/gm)
Grounded cathode, 22pF at low frequencies: at HF, cathode lead inductance
will modify this.
Grounded grid AB2, your guess is as good as mine, but my experience
suggests about 80 to 100 ohms for one. With a tube rig and a pi network, it
didn't worry me too much!
73
Peter G3RZP
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