I am really glad interest in building sets didn't just fade away with the previous forum site. I still popped in now and then to see what was brewing and being brewed.
I have built absolutely nothing in the past few of years, but the ideas still keep coming. I have another variation on the Cockaday Four Circuit Tuner rambling through the cobwebs between my ears and it won't keep quiet.
I'm looking forward to seeing what you folks are up to.
Thanks for the kind words, y'all.
Pa3651, it's a good group, a lot of thoughtful folks and a few geniuses it seems. Usually someone will help you out if your stuck on a circuit. A truly wonderful brain trust.
Qrp-gaijin, Yes, parasitic damping would be a good way to describe the control circuit. That's another thing I had been wondering about after having read about some military high-Q IF circuits that used an added resistance on the coils to reduce the Q and broaden tuning. Since the control circuit is basically a wavetrap, would adding a VARIABLE resistance to vary the Q allow me to more closely control oscillation? This would permit the same control as a vario-coupler without adding the mechanical headaches.
I have more ideas regarding this circuit, but that's enough for now.
Great to have you here. Welcome in.
Glad you found your way here. Welcome!
I don't know much about the Cockaday circuit, but I did a little reading just now, and it sounds very interesting -- I understand that it's a regenerative circuit that uses parasitic damping to control the regeneration. I look forward to hearing about your experiments or ideas.