This 8 ohm output amplifier was found in a 1968 Motorola publication. The circuit uses transistors of the time and is powered with a voltage of 25 V + 25 V.
In the figure we have a Texas Instruments circuit for TTL interfacing using discrete transistors. The two...
This circuit was found in Radio Electronics magazine from June 1963. The range is small and the...
The project presented in a 2009 documentation is intended for radio amateurs operating in the...