This circuit is temperature stabilized. Modern equivalent transistors can be used, and the power supply can actually be between 9 and 12 V. The circuit is from an old documentation.
This converter has coils according to the reception and converted frequency bands. We found it in...
This Hughes circuit is from 1968. Equivalent modern components can be used. The input impedance is...
This circuit uses common components in our market, despite being from a 1996 publication. The...