The PCF87 is a triode variable-mu pentode designed for frequency changer use. The variable-mu pentode enables the AGC line to be applied to the mixer and avoid overloading on strong local signals. The intended frequency range was probably VHF.
The perforated cylindrical screen encloses the pentode but not the triode. Both cathodes are connected together internally.
The thin glass tube envelope is 20 mm in diameter and, excluding the B9A base pins, is 48 mm tall.
Pin Connections
|
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
|
k |
g2 |
a |
h |
h |
a(t) |
g1(t) |
k,s,g3 |
g1 |
Absolute Maximum Operating Conditions
|
Vh |
Ah |
Va |
Vs |
Vg |
mAa |
mAs |
ra |
gm |
|
7.4 |
0.3 |
155 |
135 |
-3.0 |
7.8 |
2.4 |
0.4M |
4.7 |
|
Va |
mAa |
|
60 |
7.0 |
This exhibit was last updated on 15 February 2004 |
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