Following up on the excellent series "tuning your amp", I wish to present the
following scenario.
I am rebuilding a sixties-era homebrew amp running a pair of 4-400s in GG. The
power supply is a full-wave, capacitive input circuit. Recently I discovered
that the high-low voltage switch on the power supply actually switched between
two primary taps labeled 5,000 volts and 2,500 volts, respectively, for the
secondary. I have not yet tested the PS for actual DC output.
The output circuit is a standard Pi tank with fixed inductor taps on B&W coil
stock. The values of C (tune) and C (load) and the inductance are unknown.
The question: changing the Ep by fifty percent (50%) while keeping most of the
other variables constant will vary the Q and should require retuning.
Assuming the Q at one voltage is within the "acceptable" range, should I expect
the Q at the alternate Ep to be beyond acceptable with a voltage swing of
approximately 2,500v?
Input appreciated; please keep the technobabble appropriate for a
geographer...hi!
73 and thanks to all who contribute to this list...I learn a lot.
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