Tube Power Source (CB6743E)

This circuit is from a high voltage tube source. It does not include the filament voltage that must be supplied by a separate transformer.

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Tool Torque Control (CB5422E)
This circuit can be used with common drills connected to the 110 V network. With change of R1 and...
Solar Telegraphic Transmitter (CB4054E)
This telegraph microtransmitter for a frequency determined by the coil and the crystal was found...
Negative Voltage Converter (CB5107E)
This self-oscillating voltage conversion circuit was found in an American 1980s documentation. The MOSFET...