The operational amplifier for this tone control found in a 1977 Signetics manual may be the 741. The power supply must be symmetrical and the signal cables short. The bass gain is 20 dB.
This is the circuit of a small commercial amplifier from the 1970s from Philips Argentina. The...
June 2017 - New Honeywell MT MICROSWITCH Series can be ordered from Mouser Electronics for...
This simple circuit indicates the conductivity of materials through two LEDs and two LEDs are...