12AX7 - Wikipedia
Universal loadline calculator for vacuum tubes - Vacuum Tube Amplifiers - DIY
A closer look at the Fetzer Valve
Batteries & Tubes
Cathode Bypass Capacitor Calculator
Designing Common-Cathode Triode Amplifiers
Biasing and Gain
CALCULATING CATHODE BIASING RESISTOR
Biasing and Gain
Ampbooks SLO 12AX7 Bias Calculation
Triode Calculator Hosenlander
Rickenbacker Grid-Leak Bias
Ampbooks SLO 12AX7 Bias Calculation
Ampbooks SLO 12AX7 Bias Calculation
derekalderman — LiveJournal
The Valve Wizard -Cathode Follower
The Valve Wizard
Overdrive
Loadline calculator for power stages with reactive load - Vacuum Tube Amplifiers - DIY
Tube Bias Calc
The Valve Wizard -Cathode Follower
Magnatone Model MP3 Fixed Bias Preamp
Pure Tube Compound Circuits
Ampbooks SLO 12AX7 Bias Calculation
