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← PL81
PL81 — Candidate to replace following?
Power Pentode — Noval
⚠ Safety
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21A6
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Your Tube
Base:
Noval
Heater:
22V / 0.3A
Type:
power pentode
gm:
4.6
mA/V
ra:
15,000
Ω
Ia:
32
mA
Pa:
8
W
Vs:
250
V
Cgp:
0.8
pF
Pinout (Noval)
k
g1
h
h
g2
a
ia
ia
g3
Candidates to replace (1)
Fit:
Drop-in
1
Adapter
0
Status:
✓ Close
1
1 shown
▣ Compact
⚙ Thresholds filter
6.3V Heater
(1 candidates)
i
Tube
Status ↑
Pa
Ah
Fit
EL81
✓ Close
8
W
1.05
drop-in
Generated 2026-04-09
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