CW tone generator (CB21673E)

This telegraphy circuit generates an audio tone from a pure RF carrier. We found it in a publication by Gernsback from 1960.

130 to 225 MHz Prescaler (CB23596E)
This circuit can be used in PLL, frequency synthesizer in FM and VHF receivers, reducing a...
Shooting sound (CB21242E)
Found in documentation from the 1990s, it uses a sound effects integrated circuit, the SN7677 from...
Astable from 500 Hz to 5 kHz with the 4001 (CB12722E)
An oscillator whose frequency can be adjusted between 500 Hz and 5 kHz with the use of a...