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T O P I C    R E V I E W
Grant2053 Posted - May 07 2012 : 7:37:11 PM
I need some help with this radio I'm building.

http://www.aaroncake.net/circuits/one_tube_regen_radio_circuit.asp

I'm trying to track down the C1 part, the 250pf 100v Ceramic Disk cap.

But It's hard to find. So I was wondering if a 250pf 500v Ceramic Disk cap would work just as well, if at all. Because that the closest thing I can find.

If this wont work, please tell me why. I would like to learn Regen radios better.

I plan on posting pic of the finished product when I'm done.

Thx in advance,

-Grant
2   L A T E S T    R E P L I E S    (Newest First)
Aaron Cake Posted - May 19 2012 : 10:44:17 AM
Because nostalgia is fun! Why buy antiques? :)

Plus tubes just have a magic to them. It's the "spit and duct tape" period of electronics.
audioguru Posted - May 10 2012 : 11:54:32 PM
250pF is an odd value. Since the capacitor is simply an input coupling capacitor then a 220pf or 270pF capacitor at almost any voltage will be fine.

A regen radio was designed to work when there were hardly any radio stations around so it was not overloaded. Today a regen radio will be seriously overloaded by all the very strong local radio stations unless you live far from civilization or use a short antenna wire.

Note that it is an AM radio. AM radio sounds awful.

Why use an antique vacuum tube?

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