|
 |
 |
|
DDT4 B7
base |
DDT4s P
base |
Double diode / triode
Introduced in 1936 (DDT4s: 1938)
| 1 |
2 |
3 |
4 |
5 |
6 |
7 |
tc |
base |
| d1 |
m |
d2 |
f |
f |
k |
a |
g |
B7 |
|
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
tc |
base |
|
m |
f |
f |
k |
d2 |
d1 |
- |
a |
g |
P |
|
Vf |
Af |
Va |
Vg |
mAa |
ra |
gm |
|
2 |
0.65 |
250 |
-5 |
4 |
11,000 |
3.6 |
| Equivalent |
11A2, A23A, A23B, AC/DDT,
AC/HLDD, CV1182, CV3546,
CV3727,
DH42, DDT,
H4D,
MHD4, NR60, TBC14, TDD4,
RABC1,
WE37, ABC1* |
*) DDT4s
|
