This circuit appeared in Amateur Radio Today in an issue and was found in a 1995 issue. The circuit is for the AM band up to 3 MHz. The transistors are general-purpose.
Placed in the vicinity of a telegraphic transmitter (CW), this circuit produces an audible signal on...
This circuit provides 2.5 W of power with 6 V supply and 4-ohm speaker. We found it in the Radio...
This circuit was found in Intersil's documentation from the 70's, being indicated for powering...