This an old commercial receiver found in a year 1958 magazine. The circuit uses some transformer available that timer and the transistors are germanium types. The circuit is intended to receive MW stations.
A double port MOSFET is used in this circuit, which drives a 100 uA moving coil meter or close to it....
The circuit shown in the figure is suggested by National Semiconductor and is based on an...
We found this circuit in an English documentation from the 80's. Transistors are general-purpose types....