CA3080 Amplifier (CB25131E)

This amplifier with an OTA has a gain of 40 dB. The power supply must be symmetrical. Found in Radio Electronics, May 1988.

Computers Shield (CB16821E)
If you have a disused old computer, the type that still has a parallel port, you can use it in...
1 transistor receiver (CB22271E)
Using earphone for listening, this receiver has only one germanium transistor. The circuit is from...
Crystal CMOS Oscillator (CB3883E)
This oscillator can generate signals up to a few megahertz depending on the crystal used. Actually...