This excellent 30 W tube amplifier appeared in the April 1963 Radio Electronics magazine that taught how to assemble it. The critical components in our time are tubes and transformers.
This circuit was found in an 80's Electronic Design. The frequency depends on the crystal and the...
This two-port configuration of the 4001 was found in the April 1988 issue of Radio Electronics magazine....
This 5 V x 8 A power supply was found in Siliconix documentation. The unit operates with a 24 to...