This powerful high-fidelity amplifier was described in an article in Radio Electronics magazine in December 1973. Note the use of 8 high-power transistors that must be mounted on excellent heat sinks.
This amplifier for hearing aid was found in a 1968 documentation using an integrated of the time....
This transmitter was obtained in a 1953 publication. The original transistor was made of...
The integrated circuits used are from SGS, as we obtained this configuration from the 1982 company...