"N2EY" wrote in message
...
In article ,
"Paul_Morphy" writes:

The combination of the Plate Tuning capacitor and the inductor in the
output
circuit comprise a parallel-resonant tuned circuit,

The AC-1 uses a pi network output circuit.

That's right, but the plate tuning cap and the inductor still operate as a
parallel-resonant circuit. That's why plate current dips at resonance. In
conjunction with the loading capacitor, the pi network also serves to match
the plate impedance to the load impedance.

73,

"PM"