VCO without varicap (CB9435E)

This circuit was found in a 90s RF Design. It is an oscillator that can reach 800 MHz, with the frequency controlled by an input voltage.

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Phase separator (CB8104E)
This circuit provides signals in phase with the input and with the phase inverted. The circuit was...
Schmitt Trigger with 555 (CB25527E)
This is one of the many applications of the 555. We found it in the November 1992 Radio...
10W Transistorized Amplifier (CB1369E)
The circuit presented was found in a Japanese magazine in 1973. The circuit uses transistors of...