Re: ECF82 frequency changer
I think the point is that the oscillator circuit employed has other capacitors around the variable capacitor that it becomes very difficult to arrange adequately good tracking with normally tuned circuits in the RF stages.
Having to have separate manual tuning to track it yourself is tedious, but that's what you had to do with a lot of professional Racal receivers.
David
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Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done
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