[ARC5] Square wave oscillators

[Robert Eleazer]

I had assumed that tuned circuits associated with mixers and amplifiers would tend to hammer the square waves into "close enough" signals, just as such circuits turn the badly shaped outputs of Class C amplifiers into useful signals.  But I thought I would ask.  I was aware that David had used some modules as crystal replacements but was under the impression that those were sine wave output devices.

As for BFO's - oh, yes, the first BFO I ever built and added to a receiver - using a 455 KHZ IF coil and a PNP transistor per in a circuit shown in 73 Magazine - was an effective BFO, plenty of signal even with very loose coupling to the IF  - but was an even more effective jammer at multiples of the BFO frequency.  The set would start going "Whoop!  Whoop!"       

Thanks,

Wayne