This circuit comes from a 1966 NASA documentation. The circuit makes use of discrete components and is suitable for generate 455 kHz IF signals.
This indicator or logic probe was found in the April 1979 Radio Electronics magazine. The...
This simple circuit was found in an English magazine that no longer exists, January 1970 issue. This...
This low noise, low frequency instrumentation circuit was found in a 1976 NASA circuit manual. The...