TUBEOFILE
Search
Compare
FAQ
Tube+
Sign In
Sign In
☰
Loading...
← 842
Rolling Candidates to replace 842
Power Triode — DHT — UX4
⚠ Safety
Drop-In Replacements
✓
VT-72
✓
UE942
✓
PJ-9
✓
38842
Top 10 Picks
801A
drop-in
7.5V
✓ Safe
50
drop-in
7.5V
✓ Safe
VT-25
drop-in
7.5V
⚠ Low Pa
VT-25A
adapter
7.5V
✓ Safe
800
adapter
7.5V
✓ Safe
RV218
adapter
7.5V
✓ Safe
Rolling Candidates (26)
i
Heater:
1.4V
0
1.5V
0
2V
0
2.5V
1
4V
1
5V
2
6.3V
1
7V
1
7.5V
5
●
10V
3
show all (10)
Fit:
Drop-in
2
Adapter
3
Status:
✓ Safe
14
⚠ Low Pa
12
5 shown (target 7.5V only)
▣ Compact
⚙ Thresholds filter
7.5V Heater
(5 candidates)
Tube
Status ↑
Pa
Ah
Fit
50
✓ Safe
25
W
1.25
drop-in
801A
✓ Safe
20
W
1.25
drop-in
800
✓ Safe
35
W
3.25
adapter
RV218
✓ Safe
24
W
1.1
adapter
VT-25A
✓ Safe
12
W
1.25
adapter
Generated 2026-04-09
Status legend →
User Guide →
Rolling FAQ →
target +
0
selected
pick 1+ to compare
select 1+ candidate to compare