With a 475 V supply, this amplifier published in Radio Electronics magazine in January 1958 offered good power. The amplifier used 4 tubes.
This micro FM transmitter or wireless FM microphone makes use of a ceramic capsule as a microphone or...
The voltage of 30 V indicated in this project, shown in the figure depends on the diac used. It...
This circuit is intended to drive bistable relays and can be used as a shield for...