David wrote:
On Apr 20, 1:34 pm, David wrote:
Looking for Crystal Radio Receiver Circuits, that have a voltage
quadrupler to increase headphone volume without batteries or AC power.

On my original post i was, and still looking for a quadrupler circuit,
not information on why it does not work.

Sorry. Frankly I've never seen one but I guess you could lash something
together easy enough. May try asking over at the Rap-n-Tap forum. If
anybody knows of one that group would surely know.

Rgds,
Bill