This high-impedance headphone circuit was found in a 1990s William Sheets. The power is low, but the high input impedance makes it useful for radio applications.
This sensitive multi-circuit and component prover uses two transistors and has a switch position where...
The LM117 (217 and 317) provides 1.2 A with output up to 25 V and is manufactured by several...
Found in a 1980s documentation, this amplifier uses an integrated circuit that is not easy to...