TUBEOFILE
Search
Compare
FAQ
Tube+
Sign In
Sign In
☰
Loading...
← 6AX4
Rolling Candidates to replace 6AX4
Rectifier — Octal
⚠ Safety
Drop-In Replacements
✓
6AX4GT
✓
6AX4GTA
✓
6AX4GTB
Top 10 Picks
6BE3
adapter
6.3V
✓ Close
6CG3
adapter
6.3V
✓ Close
6CJ3
adapter
6.3V
✓ Close
6EC4
adapter
6.3V
✓ Safe
6AU4
adapter
6.3V
✓ Safe
6325
adapter
6.3V
⚠ Close, low Pa
6BW4
adapter
6.3V
⚠ Close, low Pa
6BY5
adapter
6.3V
⚠ Close, low Pa
6W5-G
adapter
6.3V
⚠ Close, low Pa
7Z4
adapter
6.3V
⚠ Close, low Pa
Rolling Candidates (93)
i
Heater:
2.5V
2
3.3V
0
4V
0
5V
2
6.3V
5
●
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
5
Status:
✓ Close
8
✓ Safe
8
⚠ Close, low Pa
31
⚠ Low Pa
46
5 shown (target 6.3V only)
▣ Compact
⚙ Thresholds filter
6.3V Heater
(5 candidates)
Tube
Status ↑
Pa
Ah
Fit
6BE3
✓ Close
6.5
W
1.2
adapter
6CG3
✓ Close
6.5
W
1.8
adapter
6CJ3
✓ Close
6.5
W
1.8
adapter
6EC4
✓ Safe
11
W
2.1
adapter
6AU4
✓ Safe
6.5
W
1.8
adapter
Generated 2026-04-09
Status legend →
User Guide →
Rolling FAQ →
target +
0
selected
pick 1+ to compare
select 1+ candidate to compare