Audio amplifier 741 (CB20478E)

This low power audio amplifier was found at 1992s Popular Electronics. Transistors are general purpose common types.

AM Experimental Receiver Using PNP Transistors (CIR833E)
This simple radio receiver can pick up AM stations in the MW range from 520 to 1600 kHz using a...
Field Strength Meter (CB16885E)
We found this circuit in a 1995 documentation. It can measure frequencies from 100 kHz to over 100 MHz...
Voltage divider with zeners (CB4242E)
I found this simple zener diodes voltage divider circuit in an old documentation. The resistor...