.jpg)
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|
.JPG)
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RF tetrode
Introduced in 1927
(PM12A: 1932, PM12M: 1933)
| 1 |
2 |
3 |
4 |
tc |
base |
| g2 |
g1 |
f |
f |
a |
B4 |
| |
Vf |
Af |
Va |
Vs |
Vg |
mAa |
mAs |
ra |
gm |
| PM12 |
2 |
0.3 |
150 |
75 |
0 |
4.3 |
1 |
180,000 |
1.1 |
| PM12A |
2 |
0.18 |
125 |
75 |
0 |
2 |
0.4 |
330,000 |
1.5 |
| PM12M |
2 |
0.18 |
150 |
90 |
0 |
2.5 |
0.5 |
|
1.4 |
| Equivalent |
215SG, S21, S215, S215A,
SG215 |
|
