30 MHz Amplifier (CB5939E)

This low noise circuit was obtained from a 1980s US RF publication. Transistors used are uncommon today and the gain is 19 dB..

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10-step timer LM3914 (CB24658E)
In this circuit, the LEDs light up in sequence until the last one, when the end of the timing is...
Wireless FM Microphone (CB14944E)
We found this circuit in a 1979 Poptronics. The coil is formed by 5 turns of wire 28 in an...
Up to 3.5 A DC Motor Control L165 (CB15140E)
The resistors in this circuit marked with * must be within 1% tolerance. The circuit is from the...