This amplifier with fixed AC bias was found in a 1947 documentation. The circuit uses two transformers in the power supply and two full-wave rectifier tubes.
This circuit for signals up to 30 MHz can improve your reception in the medium and short-wave...
This two-channel bargraph meter uses a single KAA2281 integrated circuit. Found in the January 1991...
This circuit allows to increase the output power of a 741 as an amplifier. The circuit is from a...