TUBEOFILE
Search
Compare
FAQ
Tube+
Sign In
Sign In
☰
Loading...
← 350A
Rolling Candidates to replace 350A
Power Triode — DHT — UX4
⚠ Safety
Drop-In Replacements
✓
350B
✓
WE350A
✓
WE350B
Top 10 Picks
75TH
adapter
5V
✓ Safe
300B
adapter
5V
✓ Safe
71A
adapter
5V
⚠ Low Pa
UX112A
adapter
5V
⚠ Low Pa
Rolling Candidates (27)
i
Heater:
1.5V
0
2V
0
2.5V
0
4V
1
5V
2
●
6.3V
1
7V
1
7.5V
4
10V
4
11V
2
show all (10)
Fit:
Drop-in
0
Adapter
2
Status:
✓ Safe
15
⚠ Close, low Pa
1
⚠ Low Pa
11
2 shown (target 5V only)
▣ Compact
⚙ Thresholds filter
5V Heater
(2 candidates)
Tube
Status ↑
Pa
Ah
Fit
75TH
✓ Safe
75
W
6.25
adapter
300B
✓ Safe
36
W
1.2
adapter
Generated 2026-04-09
Status legend →
User Guide →
Rolling FAQ →
target +
0
selected
pick 1+ to compare
select 1+ candidate to compare