We found this circuit in a 73, magazine for radio amateurs of the 90s. The circuit is passive and most telecommunications receivers can be added.
The circuit we showed was obtained from our publication on relays and makes use of any...
This VCO with the 4046 PLL generates signals from 0 to 1.5 kHz. The circuit is from a Radio...
The base of this circuit is 1/4 of an integrated circuit 4136 which consists of a quadruple 741....