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PCF80

Sensibly equivalent to:
30C1 8A8 9A8 LZ319 LZ329
See also:
Valves and their Habits - Mazda PCF80 Box
    
Extras ▼

 

The PCF80 is from the dawn of the era of VHF Band III television in the UK. The valve is a triode pentode, with separate cathodes, designed to function as a mixer and oscillator in the tuner front end.
The gap in the anode at right angles to the electron flow allows a view of the wire suppressor grid. The copper supports seen above the top mica are for the control grid.
The triode on the left has copper grid supports. Both anodes are made with a shaped section stitched to a flat sheet. The inner surface is left bright on both anodes.
The thin glass tube envelope is 20 mm in diameter and, excluding the B9A base pins, is 49 mm tall.
References: Datasheet & 1040 Type PCF80 was first introduced in 1953.

 

Pin Connections
B9A
1
2
3
4
5
6
7
8
9
a(t)
g1
g2
h
h
a
k,s,g3
k(t)
g1(t)

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
9
0.3
170
170
-5.5
5.2
1.5
0.87M
2.1

 

Absolute Maximum Operating Conditions
Triode
Va
Vg
mAa
100
-2
14
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated March 12, 2013.
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