Found in a 90s R-E Experimenters Handbook, this circuit amplifies signals from 100 Hz to 3 MHz. The circuit has a gain of approximately 30 dB. Bipolar transistors are general-purpose types.
Found in American documentation from the 90s, this circuit has the signal frequency determined by...
This two-transistor regenerative switch works as an excellent trigger for SCRs and other devices that...
This receiver for listening to headphones and 2-battery power was found in Japanese documentation from the...