TUBEOFILE
Search
Compare
FAQ
Tube+
Sign In
Sign In
☰
Loading...
← 816
Rolling Candidates to replace 816
Rectifier — DHT — UX4
⚠ Safety
Drop-In Replacements
✓
CV724
✓
VT216
Top 10 Picks
866A
adapter
2.5V
✓ Close
82
adapter
2.5V
⚠ Close, low Pa
1616
adapter
2.5V
⚠ Close, low Pa
836
adapter
2.5V
⚠ Close, low Pa
Rolling Candidates (78)
i
Heater:
2.5V
1
●
3.3V
0
4V
0
5V
2
6.3V
0
7.5V
0
10V
1
12.6V
0
16.8V
0
18.9V
0
22.4V
0
25V
0
show all (12)
Fit:
Drop-in
0
Adapter
1
Status:
✓ Close
2
✓ Safe
2
⚠ Close, low Pa
16
⚠ Low Pa
58
1 shown (target 2.5V only)
▣ Compact
⚙ Thresholds filter
2.5V Heater
(1 candidates)
Tube
Status ↑
Pa
Ah
Fit
866A
✓ Close
—
5
adapter
Generated 2026-04-09
Status legend →
User Guide →
Rolling FAQ →
target +
0
selected
pick 1+ to compare
select 1+ candidate to compare