Transistor audio mixer (CB8759E)

Found in a 90s Popular Electronics, this mixer can be expanded to more channels. Transistors can be modern general-purpose equivalents.

| Clique na imagem para ampliar |

Frequency-Corrected Astable (CB25651E)
This frequency-corrected 1 kHz circuit has a nearly perfect rectangular signal. The circuit is...
CMOS 4011 or 4001 Injector (CB4608E)
This signal injector uses a single integrated circuit as an oscillator, producing rectangular...
Transceiver To 13.5 MHz (CB4411E)
This high power transceiver provides a few watts of output thus enabling long distance...