VHF and UHF Preamplifier (CB8401E)

Found in a 90s Popular Electronics, this circuit uses a MAR-X to amplify signals up to 2 GHz. The circuit is quite critical.

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3-Transistor Regenerative Receiver CK722 (CB22538E)
This receiver with earphone listening for the medium wave range was published in Radio Electronics...
Power source from batteries (CB8125E)
Found in an Electronic Design from the 90's, this circuit supplies voltages of 5 V and 3.6 V from...
10 W inverter (CB10925E)
This transistorized circuit with germanium transistors was found in a publication from the 1960s....