This 2-tube amplifier was found in a Japanese publication of 1964. The circuit has excellent sound quality. The power supply is not given and must provide a voltage of 300 V.
This Hartley telegraphy oscillator operates with the transmitter signal generating a tone in a...
This circuit is used to test a triac and also to teach how it works. The load is an incandescent...
The purpose of this circuit is to re-trigger slow scan circuits used in the 1980s on low frequency...