|
|
HP210 (B4 base) |
HP210c (B7 base) |
Low-microphony RF pentode
Introduced in 1934 (HP210n and
HP210nc: 1938)
HP210 |
1 |
2 |
3 |
4 |
tc |
base |
|
f,g3 |
g |
f,g3 |
a |
g2 |
B4 |
HP210c |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
tc |
base |
|
s |
g1 |
g3 |
f |
f |
- |
g2 |
a |
B7 |
Vf |
Af |
Va |
Vs |
Vg |
mAa |
mAs |
ra |
gm |
2 |
0.12 |
150 |
150 |
-1.5 |
1.9 |
0.7 |
2,500,000 |
1.9 |
|