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← 12AX4
Rolling Candidates to replace 12AX4
Rectifier — Octal
⚠ Safety
Drop-In Replacements
✓
12AX4GT
✓
12AX4GTA
✓
12AX4GTB
Top 10 Picks
12D4
adapter
12.6V
✓ Safe
12X4
adapter
12.6V
⚠ Low Pa
Rolling Candidates (93)
i
Heater:
2.5V
4
3.3V
0
4V
0
5V
2
6.3V
7
7.5V
0
10V
1
12.6V
1
●
16.8V
1
18.9V
1
19V
1
22.4V
1
25V
1
show all (13)
Fit:
Drop-in
0
Adapter
1
Status:
✓ Close
10
✓ Safe
10
⚠ Close, low Pa
29
⚠ Low Pa
44
1 shown (target 12.6V only)
▣ Compact
⚙ Thresholds filter
12.6V Heater
(1 candidates)
Tube
Status ↑
Pa
Ah
Fit
12D4
✓ Safe
5.5
W
0.6
adapter
Generated 2026-04-09
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