Re: Need Schematic Of 1 Tube Radio Receiver With Quartz Crystal ForTank

As I said, this becomes real engineering. That takes time.

I suppose Fulton intended to use ears, but I've seen no requirement.

He didn't state a requirement, but the answer is none. With one dominant resonator, a single-peaked passband is what you expect. The stop band will be more complicated.

Working with NASA is not good training for doing things quickly and simply. And this is a tricky problem. Actually, I think the hardest part will be getting enough gain out of one tube to be able to hear anything at HF: signals and noise up there are less than at MF. The classic trick is to use regeneration, but that boosts both Q and gain, and he presumably doesn't want to boost Q here. But I'd never discourage somebody from experimenting if there's no fundamental flaw in their idea. And I don't think there is a fundamental flaw here, just some tricky design issues that can't be solved by cookbook engineering.

There are certainly cookbook structures, and I even suggested one earlier in this thread. But Fulton wants one tube and one crystal. That's trickier. Maybe there's something useful to him in all those Google hits, but I haven't the time to review that much stuff. He might like a specific suggestion, and neither of us have been terribly much help on that score...