This FM receiver tuning step circuit was found in a 1960 documentation. No information about the coils is given, but the FI used at the time was 10.8 MHz.
This circuit was found in a 1968 RCA documentation. The circuit can be designed with operational...
This resistance meter with the CA3130 was found in an English publication from 1977. The circuit has...
This is the 1968 MR480 commercial cassette recorder circuit. The circuit was fully transistorized and...