Medium wave range booster (CB21677E)

This circuit is from a 1960 book by Hugo Gernsback. The transistors are germanium from the time.

3 V relaxation oscillator (CB8047E)
We found this relaxation oscillator in a 1967 General Electric documentation. The frequency is given...
555 Duty Cycle Oscillator (CB24846E)
This circuit was found in the September 1984 issue of Radio Electronics magazine. The circuit has...
FM and VHF transmitter (CB18108E)
Although the BD135 transistor is not specifically for RF applications, some of them can easily...