Recommended by 90s a Radio Electronics, this unit uses a transformer with a 70 V x 5 A secondary, being indicated for powering amplifiers from 50 to 100 W.
This circuit simulates an inductor. Or operational amplifier of old type, but a configuration is...
We found this circuit in a 1967 Electronic Design. The circuit uses contemporary transistors that...
To control relays safely with double insulation, we suggest the circuit in the figure. The optical...