Tone generator for telegraphy (CB21959E)

This tone generator for CW was found in a publication by Gernsback from 1960. The circuit makes use of a germanium transistor of the time.

13.8 V x 5 A Power Supply (CB1216E)
This source was found in a 1982 American publication, but can be easily assembled using 2N2995 (PNP...
Remote control receiver 2 (CB20469E)
This receiver can operate with the transmitters shown in previous articles and even others...
Car Voltage Regulator (CB12090E)
We got this circuit in an old 1983 publication, but it can be fitted with equivalent transistors. For Q1...