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← KT120
Rolling Candidates to replace KT120
Beam Tetrode — Octal
⚠ Safety
Top 10 Picks
KT150
drop-in
6.3V
✓ Close
KT170
drop-in
6.3V
✓ Close
6CD6G
adapter
6.3V
⚠ Close, low Pa
KT90
adapter
6.3V
⚠ Low Pa
6550
adapter
6.3V
⚠ Low Pa
KT88
adapter
6.3V
⚠ Low Pa
6CB5A
adapter
6.3V
⚠ Low Pa
5B/254M
adapter
6.3V
⚠ Low Pa
EL37
adapter
6.3V
⚠ Low Pa
EL60
adapter
6.3V
⚠ Low Pa
Rolling Candidates (38)
i
Heater:
6.3V
2
●
12.6V
0
13V
0
19V
0
21V
0
25V
0
26.5V
0
35V
0
show all (8)
Fit:
Drop-in
2
Adapter
0
Status:
✓ Close
2
⚠ Close, low Pa
1
⚠ Low Pa
35
2 shown (target 6.3V only)
▣ Compact
⚙ Thresholds filter
6.3V Heater
(2 candidates)
Tube
Status ↑
Pa
Ah
Fit
KT170
✓ Close
85
W
1.85
drop-in
KT150
✓ Close
70
W
1.75
drop-in
Generated 2026-04-09
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