This amplifier for playback of recordings was found in a 1947 manual. It uses a push-pull output with a tube power supply.
This circuit for automotive use was found in American documentation from the 90s. The circuit uses...
This is the name given to the 1969 Electronics World voltage inverter. It is a series converter...
We found this circuit in an 80's Electronic Design. It makes use of couplers of the time that can...