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← 5B/254M
Rolling Candidates to replace 5B/254M
Beam Tetrode — Loctal
⚠ Safety
Drop-In Replacements
✓
CV428
✓
5B/251M
✓
5B/255M
✓
5B/254G
✓
CV2347
✓
5B/253M
Top 10 Picks
KT8C
adapter
6.3V
✓ Close
KT150
adapter
6.3V
✓ Safe
KT120
adapter
6.3V
✓ Safe
6CB5A
adapter
6.3V
✓ Safe
12E1
adapter
6.3V
✓ Safe
807
adapter
6.3V
✓ Safe
KT170
adapter
6.3V
✓ Safe
6DQ5
adapter
6.3V
⚠ Low Pa
EL36
adapter
6.3V
⚠ Low Pa
6P14P
adapter
6.3V
⚠ Low Pa
Rolling Candidates (29)
i
Heater:
6.3V
7
●
12.6V
2
13V
0
19V
2
21V
0
25V
0
26.5V
0
35V
0
show all (8)
Fit:
Drop-in
0
Adapter
7
Status:
✓ Close
4
✓ Safe
7
⚠ Low Pa
18
7 shown (target 6.3V only)
▣ Compact
⚙ Thresholds filter
6.3V Heater
(7 candidates)
Tube
Status ↑
Pa
Ah
Fit
KT8C
✓ Close
25
W
1.27
adapter
KT170
✓ Safe
85
W
1.85
adapter
KT150
✓ Safe
70
W
1.75
adapter
KT120
✓ Safe
60
W
1.8
adapter
12E1
✓ Safe
35
W
1.6
adapter
6CB5A
✓ Safe
26
W
2.5
adapter
807
✓ Safe
25
W
0.9
adapter
Generated 2026-04-09
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