Search found 10 matches

by eburman
Mon Jan 11, 2016 7:59 am
Forum: Nuts & Volts Magazine Discussions
Topic: BUILD THE RETRO REGEN RADIO
Replies: 19
Views: 5259

Re: BUILD THE RETRO REGEN RADIO

Yes, I was considering that option too. Just like old time crystal radios with the slider that runs across the coil. I'll probably wind up wrecking my beautifully wound spider coil but there's no better way to learn I suppose. I can always make another one. I also noticed that the tank circuit is af...
by eburman
Fri Jan 08, 2016 3:41 pm
Forum: Nuts & Volts Magazine Discussions
Topic: BUILD THE RETRO REGEN RADIO
Replies: 19
Views: 5259

Re: BUILD THE RETRO REGEN RADIO

Hey that's a great idea CeaSaR! Thanks for the tip.
Erik
by eburman
Wed Jan 06, 2016 3:31 pm
Forum: Nuts & Volts Magazine Discussions
Topic: BUILD THE RETRO REGEN RADIO
Replies: 19
Views: 5259

Re: BUILD THE RETRO REGEN RADIO

Thanks for your kind reply CeaSaR. I think that you must be looking at the cover photo for the article. It initially had me fooled too, but there is actually no vertical coil component. It's all part of a single spiderweb. There are two parts of the coil wound very close together. There is the outer...
by eburman
Tue Jan 05, 2016 8:04 pm
Forum: Nuts & Volts Magazine Discussions
Topic: BUILD THE RETRO REGEN RADIO
Replies: 19
Views: 5259

Re: BUILD THE RETRO REGEN RADIO

Ahh, now I get it!.... mmF = mumford = pF. Beginning to pick up the old school vernacular! Also, I re-read your initial reply. So I think you are saying that the band range is necessarily going to be limited by the constraints of the circuit design. If that's the case, I'll just add in the 68 "mumfo...
by eburman
Tue Jan 05, 2016 7:18 pm
Forum: Nuts & Volts Magazine Discussions
Topic: BUILD THE RETRO REGEN RADIO
Replies: 19
Views: 5259

Re: BUILD THE RETRO REGEN RADIO

Hello Rich (or do you prefer Dick?): I hope that you are enjoying your travels. Thanks so much for your prior reply. So, as I mentioned, things are working sort of well except that the entire AM broadcast band is bunched up at the extreme end of the air variable capacitor tuning range (far clockwise...
by eburman
Tue Dec 29, 2015 5:30 pm
Forum: Nuts & Volts Magazine Discussions
Topic: BUILD THE RETRO REGEN RADIO
Replies: 19
Views: 5259

Re: BUILD THE RETRO REGEN RADIO

Thanks for your reply Dick. Much appreciated! I gather from your reply that everything is working pretty much as might be expected given the limitations of the regenerative receiver? I'm good with that. I was thinking that maybe I didn't wind the antenna coil correctly for optimum performance. But b...
by eburman
Sun Dec 27, 2015 10:26 am
Forum: Nuts & Volts Magazine Discussions
Topic: BUILD THE RETRO REGEN RADIO
Replies: 19
Views: 5259

Re: BUILD THE RETRO REGEN RADIO

Thanks Len and Dale for your ideas and suggestions. I used a single section variable air capacitor which I think is identical to the one suggested by Dick. I think I've connected it up correctly but for some reason the commercial AM band is all bunched up at the far end. The top end of the band may ...
by eburman
Fri Dec 25, 2015 10:59 am
Forum: Nuts & Volts Magazine Discussions
Topic: BUILD THE RETRO REGEN RADIO
Replies: 19
Views: 5259

Re: BUILD THE RETRO REGEN RADIO

Thanks Vern! I mainly want Dick Whipple to know that I enjoyed his well written project. It's unique and diverse articles like this one that ensure that I keep re-upping my subscription to Nuts and Volts Magazine! The best hobby electronics magazine out there.
by eburman
Wed Dec 23, 2015 5:37 pm
Forum: Nuts & Volts Magazine Discussions
Topic: BUILD THE RETRO REGEN RADIO
Replies: 19
Views: 5259

BUILD THE RETRO REGEN RADIO

I completed this project and it's working great! I've been looking for a good introductory project that would help me learn old school vacuum tube electronics and this was the perfect spring board. I love the warm glow of the tube, The clunky variable air capacitor and learning how to wind my own sp...
by eburman
Fri May 15, 2015 5:34 pm
Forum: Nuts & Volts Magazine Discussions
Topic: Annoy-O-Matic
Replies: 0
Views: 2911

Annoy-O-Matic

I was thinking of patching together Bob Diaz's Annoy-O-Matic project published in the April 2015 issue of N&V magazine. Bob emphasizes in his build how he has kept the circuit simple for us noobs. He was kind enough to include a link for the PIC code hex file. So, I read the article with interest ex...