[Synchrodyne]

Thanks, Nick. That might be the Slifkin & Dori article. If so, the homodyne section did not use a tank circuit between the limiter and the multiplier, unlike say the earlier Herbert design.

Homodyne and synchrodyne receivers per se seem to have been little used in commercial practice. On the other hand, their respective methods of demodulation, quasi-synchronous and [fully] synchronous have been much applied to intermediate (and subcarrier) frequencies in diverse situations. I have a partial list that I’ll post shortly.

Cheers,