|
.JPG)
|
|
|
RF screened grid tetrode
Introduced in 1929
MS4B version (1931) has maximum gain improvement.
This valve was also made as catkin valve (1933)
| 1 |
2 |
3 |
4 |
5 |
tc |
base |
| f |
g2 |
f |
g1 |
k,s |
a |
B5 |
|
|
Vf |
Af |
Va |
Vs |
Vg |
mAa |
mAs |
ra |
gm |
|
MS4 |
4 |
1 |
200 |
70 |
-1.5 |
2.4 |
0.3 |
500,000 |
1.1 |
|
MS4B |
4 |
1 |
200 |
80 |
-1 |
3.4 |
1.2 |
350,000 |
3.2 |
|
