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.
This receiver receives signals from the PX or Citizen Radio band at 27 MHz. The circuit is from an...
We obtained this configuration from an old RCA manual of linear integrated circuits. The...
Found in Popular Electronics from the 90s, this circuit detects modulated infrared radiation and...