TubeBias Pro
Guitar Amp Bias Calculator
by Potato Head Electronics
v2.0 — Free & Pro
Amplifier Configuration
Measured at plate pin of output tube (B+)
6L6GC: 30W max plate dissipation
70%
Class AB: 60–75% typical  |  Class A: 80–95% typical  |  SE: 70–80% typical
Bias Results
Dissipation Gauge — Per Tube
Technical Breakdown
Export

📄 Download Your Bias Report (PDF)

A complete, printable bias sheet for your amplifier — ideal for your tech, notebook, or service records.

  • Full bias calculation summary with all parameters
  • Tube spec reference & safe operating recommendations
  • Printable format for amp technicians
  • Branded with your amp model name
🛒 Tools I Use for Amp Work — Available on Amazon

Amazon affiliate links — same price for you, small commission for me. It helps keep these tools free and the content running.

📏
Fluke 87V Digital Multimeter
Industry standard — True RMS, essential for bias work
→📏
Fluke 179 Digital Multimeter
Reliable all-rounder for voltage and resistance
→🔌
Bias Probe / Bias Meter
Safe plate current measurement — must-have for biasing
→🔭
Keysight DSO Oscilloscope
Professional bench oscilloscope for signal analysis
→🔧
Hakko FX888D Soldering Station
The gold standard for amp and pedal electronics work
→🪄
Engineer Solder Sucker
Clean, precise desoldering — essential for any repair
→💡
Matched EL34 Tube Pair
Quality matched output tubes for rebias
→💡
Matched 6L6GC Tube Pair
For Fender and Mesa-style amplifiers
→
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