We found this balanced modulator circuit for DSB and possibly SSB transmissions in US 1980s telecommunications documentation. The diodes can be replaced with equivalents.
We found this circuit in Motorola's 1990 Linear Databook. The component used is unusual. The...
Using the NE5205 integrated circuit this circuit was found in the May 1987 issue of Radio...
This is the diagram of the AM Sentinel 369 transistor radio obtained in a Japanese documentation from the...