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Substitution Guide

Find compatible replacements for nearly 2,000 tube types. · in Vacuum Tubes

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Find compatible replacements for nearly 2,000 tube types. Each substitute is graded Exact / Drop-in / Rebias / Caution with notes on sonic differences and heater current -the detail that prevents overloading a mains transformer.

Tube Pinout — Dual Triode Connections — Tube Substitution — Dual Triode Connections

How to use

What it's for

The tube you need is dead or unobtainable, and you want to know what else fits.

You enter

The tube you have.

You get

Candidate substitutes, each graded: Exact, Drop-in, Rebias (bias must be reset) or Caution.
Notes on sonic differences and heater current — a substitute drawing more heater current can overload the mains transformer.

Substitution Guide

How to use

What it's for

You enter

You get

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