Found in Radio Electronics magazine from 1959, this high-fidelity amplifier has 15 W of power. Power supply was not provided.
This circuit used in tape recorders was found in an Electronic Design. The components support...
We found this range of LEDs with the UAA180 in the 1976 Siemens Integrated Circuits manual. The...
This two-station intercom was found in documentation from 1966. R4 should be experimentally...