Re: JRC NRD515 HF Coms Receiver, 1982, FM on VFO?
Just a thought...
That copper tape wrap on the transformer goes around the winding and inside the limbs, do it's a Faraday screen, it can't have its ends connected together else it'd be one hell of a shorted turn. So it stops capacitive coupling from the windings to its neighbourhood.
Some transformers have a copper flux leakage strap around the whole thing, over the outside of the limbs and everything. This IS soldered together and shorted-turns the flux escaping from the transformer, but not the flux within the transformer.
This whole thread is going swimmingly. There are a few areas where the 50Hz sideband business can be attacked fairly easily.
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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