3-Bit AD Converter (CB9027E)

This fast converter using operational was found in a 70s American documentation. The circuit can be implemented with equivalent components.

Signal Follower (CB1356E )
If you have a common analog multimeter, you can increase its input resistance in the measurement of...
1 W Amplifier with the TAA300 (CB6164E)
Found in a 1968 documentation, this small amplifier was very popular at the time being used in...
Beacon transmitter (CB9382E)
Found in a magazine 73 for radio amateurs, this circuit operates in the 144 MHz band, at a...