This TTL circuit is from a Radio Electronics magazine from February 1973. The circuit must be powered with 5 V and the maximum frequency depends on the TTL integrated circuit.
This converter for WWV time reference station signals was found at Popular Electronics. The 15 MHz...
We found this oscillator in a publication for radio amateurs from the 70s. The circuit generates...
In the figure we have the way to control a triac with a low current and low voltage switch,...