We found this circuit in the December 1998 issue of Electronics Now magazine. RF transistors such as the BF494 or BF495 can be used. The circuit works at lower frequencies.
This circuit for photography uses was found in the Electronics Experimenter Handbook Special...
This two-transistor radio was found in a Japanese publication from the 1960s, with no information on the...
This solar cell powered circuit generates a standard 100 kHz signal. The circuit is from a 1960...