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 shield circuit was found in an American publication from the 80's. The triac is of low...
The Variable Frequency Oscillator (VFO) shown in the figure can generate signals in a frequency range...
This circuit was obtained from an 80's Radio Electronics. The circuit decodes “scrambled” or...