This is a little off topic but its for research ultimately in
amplifiers. How many older receivers or transceivers, preferably tube
type had the mixer circuits grid driven by the oscillators? I know some
did along with military receivers. What I'm needing is the manufacturers
and models of some that did. This is research into IMD in the
transceiver thus being transmitted to the amp, and or other signals
coming into the grid on grid driven triodes, tetrodes and pentodes in PA
circuits. If you can recall any models, please let me know. One good
example of a transceiver was the Henry Tempo One. I have some older
military receiver manuals here which did this. Most Drakes either mixed
the signals using the cathode or using a pentagrid converter. The ones
needed added both the incoming signal and the oscillator signal to the
control grid of the mixer tube.
Will Matney
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