Yes, it's the total capacitance! (and I confess I calculated it by measuring plates... let's forget it)
Anyway.
Now it works very well with headphones, BUT:
- does not work with speaker (makes different noises depending on which speaker)
- does not work if I don't touch the box (the usual motorboating)
- reaches one radio channel only, at 540-550 kHz
I tried both with one and with two capacitors, same result. It's very strange, because there are other channels above and below that frequency, very close to it.
View attachment 8693 Here's a picture of the situation...
(1) That circuit is not designed to drive a speaker directly.
(2) The world of RF is a different animal. You can't have things hanging out like that.
(3) The Rotor on the cap should be the terminal committed to the 100nF and 120K node..
(4) Anything I may have missed.
Chris
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