TUBEOFILE
Search
Compare
FAQ
Tube+
Sign In
Sign In
☰
Loading...
← 56
Rolling Candidates to replace 56
Small Signal Triode — UX5
⚠ Safety
Drop-In Replacements
✓
CV611
✓
VT-56
✓
56A
✓
56S
Top 10 Picks
27
drop-in
2.5V
⚠ Low Pa
Rolling Candidates (78)
i
Heater:
2.5V
0
●
4.2V
1
6.3V
39
7V
1
8.4V
2
9V
1
12.6V
18
17.5V
1
19V
1
25V
2
show all (10)
Fit:
Drop-in
0
Adapter
0
Status:
✓ Close
1
✓ Safe
65
⚠ Close, low Pa
1
⚠ Low Pa
11
0 shown (target 2.5V only)
▣ Compact
⚙ Thresholds filter
No candidates match the selected filters.
Show candidates on other heater voltages (9 additional)
Generated 2026-04-09
Status legend →
User Guide →
Rolling FAQ →
target +
0
selected
pick 1+ to compare
select 1+ candidate to compare