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← KT120
KT120 — Candidate to replace following?
Beam Tetrode — Octal
⚠ Safety
Top 10 Picks
6L6
drop-in
6.3V
✓ Safe
6P3S
drop-in
6.3V
✓ Safe
KT63
drop-in
6.3V
✓ Safe
KT150
drop-in
6.3V
⚠ Close, low Pa
KT170
drop-in
6.3V
⚠ Close, low Pa
Your Tube
Base:
Octal
Heater:
6.3V / 1.8A
Type:
beam tetrode
gm:
12.5
mA/V
ra:
3,000
Ω
Ia:
150
mA
Pa:
60
W
Vs:
225
V
Cgp:
1.8
pF
Pinout (Octal)
ia
h
a
g2
g1
nc
Candidates to replace (5)
Fit:
Drop-in
3
Adapter
0
Status:
✓ Safe
3
⚠ Close, low Pa
2
3 shown
▣ Compact
⚙ Thresholds filter
6.3V Heater
(3 candidates)
Tube
Status ↑
Pa
Ah
Fit
6L6
✓ Safe
19
W
-68%
0.9
drop-in
6P3S
✓ Safe
19
W
-68%
0.9
drop-in
KT63
✓ Safe
11
W
-82%
0.7
drop-in
Generated 2026-04-09
Status legend →
User Guide →
target +
0
selected
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