Placed near a common receiver, this oscillator is intended to generate a beating signal to receive RTTY or SSB communications. The circuit is from old telecommunications documentation.
This shield circuit can serve as a basis for a digital mixer or simply for a switch without noise...
Found in a 1967 RCA documentation, this circuit can be made with equivalent SCRs according to the...
This circuit is from 2005 Linear Technology documentation. The circuit applies to 12 V systems and...