TUBEOFILE
Search
Compare
FAQ
Tube+
Sign In
Sign In
☰
Loading...
← GZ37
Rolling Candidates to replace GZ37
Rectifier — Octal
⚠ Safety
Drop-In Replacements
✓
CV378
✓
CV5745
✓
53KU
✓
U54
✓
GZ34
✓
5AR4
Top 10 Picks
1641
adapter
5V
✓ Close
5R4
adapter
5V
✓ Safe
673
adapter
5V
✓ Safe
872A
adapter
5V
✓ Safe
5C4S
adapter
5V
⚠ Close, low Pa
5Ts4S
adapter
5V
⚠ Close, low Pa
5V4
adapter
5V
⚠ Close, low Pa
83V
adapter
5V
⚠ Close, low Pa
GZ32
adapter
5V
⚠ Close, low Pa
GZ33
adapter
5V
⚠ Close, low Pa
Rolling Candidates (92)
i
Heater:
2.5V
2
3.3V
0
4V
0
5V
4
●
6.3V
4
7.5V
0
10V
0
12.6V
0
16.8V
0
18.9V
0
19V
1
22.4V
0
25V
1
show all (13)
Fit:
Drop-in
0
Adapter
4
Status:
✓ Close
6
✓ Safe
6
⚠ Close, low Pa
42
⚠ Low Pa
38
4 shown (target 5V only)
▣ Compact
⚙ Thresholds filter
5V Heater
(4 candidates)
Tube
Status ↑
Pa
Ah
Fit
1641
✓ Close
25
W
3
adapter
5R4
✓ Safe
—
2
adapter
673
✓ Safe
—
10
adapter
872A
✓ Safe
—
7.5
adapter
Generated 2026-04-09
Status legend →
User Guide →
Rolling FAQ →
target +
0
selected
pick 1+ to compare
select 1+ candidate to compare