Based on a PLL 567, this circuit serves as a receiver for the CB9574E circuit. S tuning is done in R1 and it is used for frequency modulated signals.
This experimental good sensibility radio was obtained from a 1968 magazine. The magazine no longer...
This circuit was found in Popular Electronics. Its purpose is to warn the visually impaired when a glass...
Found in a 1965 Electronic Design, this circuit makes it possible to select signals with an...