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PCF87

Sensibly equivalent to:
30C17
See also:
Valves and their Habits - Mazda 30C17 Advert
    
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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.
References: Datasheet & 1040. Type PCF87 was first introduced in 1960.

 

Pin Connections
B9A
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
Pentode
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

 

Absolute Maximum Operating Conditions
Triode
Va
mAa
60
7.0
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated January 14, 2013.
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