Found in old documentation, this receiver for the mid-wave range uses transistors from the era. In fact, modern general-purpose equivalents can be used.
The purpose of this 2000 documentation circuit is to decode SSB (BLU) signals to be audible on...
This circuit was found in a Popular Electronics of the 1980s. The microammeter may be the lowest...
This high selectivity circuit for single tone decoding was found in 1970s documentation. The coil...