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Audio output pentode
Introduced in 1932 (1936: B5)
1 |
2 |
3 |
4 |
5/sc |
Base |
a |
g1 |
f |
f,g3 |
g2 |
B5/B4 + sc |
|
Vf |
Af |
Va |
Vs |
Vg |
mAa |
mAs |
gm |
ra |
Pout |
1932 |
2 |
0.2 |
150 |
150 |
-4.5 |
9.5 |
2 |
2.5 |
|
0.42 |
1936 |
2 |
0.15 |
135 |
135 |
-4.5 |
5.6 |
|
2.2 |
150,000 |
0.34 |
Equivalent |
220OT, 220PEN, CV3646,
K70B, KT2, PEN220,
PENB1, PT2, VR118 |
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