This 10W commercial amplifier circuit was found in the September 1958 Radio Electronics magazine. Its power is 10W with excellent sound quality.
This VCO makes use of an RC4558 which is an operational amplifier with characteristics close to...
In the figure we have a symmetrical power supply stabilized by a zener diode. Transformer and...
The crystal used in this oscillator can have frequencies up to 30 MHz or more, depending on the...