April 20th 09, 07:34 PM
posted to rec.radio.amateur.homebrew
|
|
external usenet poster
|
|
First recorded activity by RadioBanter: Apr 2009
Posts: 9
|
|
XTAL Radio Receiver Circuits
Looking for Crystal Radio Receiver Circuits, that have a voltage
quadrupler to increase headphone volume without batteries or AC power.
|