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30C17

Sensibly equivalent to:
PCF87
See also:
Valves and their Habits - Mazda 30C17 Advert - Mazda TV Frame-Grid Valves Advert - Mazda 30C17 Advert
    
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The 30C17 is a triode variable-mu pentode designed for television frequency changer use. When introduced it was the first variable μ TV frequency changer to be available in the UK.
The frame-grid 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 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 47 mm tall.
References: Datasheet & 1040. Type 30C17 was first introduced in 1961.

 

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 December24, 2013.
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