TUBEOFILE
Search
Compare
FAQ
Tube+
Sign In
Sign In
☰
Loading...
← 30
Rolling Candidates to replace 30
Small Signal Triode — DHT — UX4
⚠ Safety
Drop-In Replacements
✓
VT-27
✓
VT-67
✓
CV604
Top 10 Picks
31
drop-in
2V
⚠ Low Pa
1H4
adapter
2V
✓ Close
Rolling Candidates (17)
i
Heater:
1.4V
0
1.5V
0
2V
1
●
2.5V
0
3.3V
0
4V
0
5V
1
6.5V
0
7V
0
7.5V
0
show all (10)
Fit:
Drop-in
0
Adapter
1
Status:
✓ Close
2
⚠ Low Pa
15
1 shown (target 2V only)
▣ Compact
⚙ Thresholds filter
2V Heater
(1 candidates)
Tube
Status ↑
Pa
Ah
Fit
1H4
✓ Close
—
0.06
adapter
Generated 2026-04-09
Status legend →
User Guide →
Rolling FAQ →
target +
0
selected
pick 1+ to compare
select 1+ candidate to compare