40-meter transmitter (CB9380E)

This transmitter for the 40 meter or 7 MHz band was found in a magazine 73 for radio amateurs of the 90s. The circuit has a power of ½ W.

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2 to 22 MHz Crystal Oscillator (CB13867E)
This oscillator, from a 1978 amateur radio manual, can oscillate in frequencies from 2 to 22 MHz...
Function Generator II (CB19527E)
The operational ones used in this circuit are not very common today, but the same circuit can be...
Microammeter with the 709 IC (CB24197E)
Using a 709 integrated circuit this circuit was found in the June 1972 issue of Radio Electronics...