Re: GEC-Marconi single-frequency HF Rx
Sticking an FM IF in as a side-chain was also a way of implementing noise-operated squelch.
The up-conversion to 35-ish MHz suggests that the modules are intended to be made for anywhere up to 30MHz. If thet's the order of IFs then I'd be looking for a conversion oscillator as the LO for the mixdown.
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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