Vacuum Tube Circuits

2 Valve 40m CW Transmitter

25L6 Amp: design without a power transformer

Hybrid Amplifier using a 5687 Tube & Magnetic Power MOSFETs

One Valve 3.5MH CW Transmitter

Phono Preamp (valve): tube design

Pure a Class Tube Amp: 15W pure A Class and push-pull

Push Pull Class A 2A3 Stereo Amp (valve)

Push Pull Class A Amp using type 5687 Dual Triodes

Quad 22 Tube Amp: circuit diagram of commercial tube amplifier

RCA Theremin Circuit

Single Ended Class A2 SV811 10 Stereo Amp

Stereo Tube Amplifier

Top Level OTL Tube Headphone Amplifier

Tube Amplifiers

Tube Buffer for CD Player

Two Valve 40m CW Transmitter

VOX AC30 Guitar Amplifier Simulator