This circuit is from 2005 documentation. The integrated amplifier circuit must be mounted on a good heat sink and the speaker must be able to withstand the full power of the circuit.
This circuit requires an input current of only 20 fA (femto amps) which corresponds to a...
This circuit for frequencies of 20 to 2 kHz was obtained in English documentation from 1966. The...
This timer can control loads up to 240 W. We found it in a 1967 RCA documentation. The main...