12AX7 — Candidate to replace following?

Small Signal Triode — Noval

Equivalents — Same Tube, Different Names

✓ ECC83✓ ECC803✓ ECC803S✓ 7025✓ 12AX7A✓ 12AX7WA✓ 12AX7S✓ M8137✓ CV4004✓ CV492✓ B339✓ B759✓ 5721✓ 6057✓ 6681✓ 7729✓ 12DF7✓ 12DT7✓ E2164✓ 6L13✓ 8339✓ E83CC

Top 10 Picks

5751drop-in

12.6V✓ Safe

12AY7drop-in

12.6V⚠ Low Pa

12AZ7drop-in

12.6V⚠ Low Pa

A2900drop-in

12.6V⚠ Low Pa

Your Tube

Base: Noval

Heater: 12.6V / 0.15A

Type: small signal triode

mu:100gm:1.6mA/Vra:62,500ΩIa:1.2mAPa:1WCgp:1.7pF

Pinout (Noval)

a2g1_2k2hha1

Candidates to replace (5)

Heater:

Fit:

Status:1 shown (target 12.6V only)

12.6V Heater(1 candidates)

	Tube	Status ↑	Pa	Ah	Fit
	5751	✓ Safe	0.8W-20%	0.175	drop-in

Generated 2026-04-09Status legend →User Guide →

target +0 selectedpick 1+ to compareselect 1+ candidate to compare