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.
The circuit is suitable for calls in a residence and was published in the Radio Electronics...
This 25 W phase photo control was found in a 1965 General Electric publication. The circuit uses a...
The integrated circuit in question is an adjustable high voltage regulator from Texas Instruments...