Precision Crystal Calibrator CIR22334S CB21784E (CB21784E)

We found this circuit in a 1977 radio documentation. The circuit uses TTL frequency dividers from the time.

Pulse Width to Capacitance Converter (CB6100E)
Suggested by Linear Technology, this 80's circuit makes use of an operational of the time but can...
Ultrasonic generator (CB21313E)
This circuit was found at Popular Electronics. The speaker is of the greater than 100-ohm...
Two Transistors MW Radio (CB12819E)
This experimental radio was obtained in an old Argentine publication. Germanium transistors are...