Cathode-coupled pentode valve amplifier with servo offset...

Circuit for linearization of amplified electronic signals

Control circuit for varying power output of push-pull tube ampli

Drive control to prevent simultaneous conduction in push-pull sw

High power class B modulation amplifier for a broadcast transmit

High-power, high-fidelity tube amplifier

Phase inverter and push-pull amplifier using the same

Power amplifier capable of simultaneous operation in two classes

Power amplifier capable of simultaneous operation in two classes

Power amplifier with modified dynamic response

Power supply for guitar amplifier

Push-pull audio amplifier with crossover distortion compensation

Tube type power amplifier with distortion control

Vacuum tube amplifier with selectable power devices

Vacuum tube audio amplifying circuit

Vacuum tube power amplifier switchable between push-pull and...