|
|
|
 |
 |
| B5
base |
B7 base |
Output pentode
Introduced in 1931 (PEN4VA, 1933 (B7), 1934
(B5+sc), 1937 (B7)
| 1 |
2 |
3 |
4 |
5 |
sc |
base |
| a |
f |
f |
g1 |
k,g3 |
g2 |
B5 |
| 1 |
2 |
3 |
4 |
5 |
6 |
7 |
base |
| - |
g1 |
g2 |
f |
f |
k,g3 |
a |
B7 |
|
|
Vf |
Af |
Va |
Vs |
Vg |
mAa |
mAs |
ra |
gm |
Pdiss |
Pout |
|
PEN4V |
4 |
1 |
250 |
200 |
-13 |
35 |
10 |
8,000 |
3 |
|
2 |
|
PEN4VA ('33/'34) |
4 |
1.5 |
250 |
250 |
-22 |
32 |
12 |
|
|
8 |
3.4 |
|
PEN4VA (1937) |
4 |
1.35 |
250 |
250 |
-20 |
36 |
3 |
40,000 |
2.8 |
|
3.8 |
| Equivalent |
7A2, A70B, AC/Pen, APP4A, CV1174,
KT42, MPPen, MPT4 |
|
