This converter for WWV time reference station signals was found at Popular Electronics. The 15 MHz signals are now received on a medium wave radio at 1 MHz.
Originally created to feed the filaments of a 12AX7 as an audio preamplifier to eliminate the...
In the figure we show how to implement a TTL photo-trigger with the 7413. This circuit can be used...
Found in old documentation, this circuit consists of a simple power source where the transistor must be...