This circuit is from an English documentation from 1969. The circuit can be designed based on modern equivalent transistors. Diodes are general purpose types.
This pocket-sized VHF receiver was found in Radio Electronics magazine from January 1961. It uses...
The integrated circuit used in this old configuration is not common today. In it we have the way...
The difference between this circuit and the previous one is that it uses PNP transistors. The...