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PCF80

Sensibly equivalent to:
30C1 8A8 9A8 LZ319 LZ329
See also:
Valves for Bands III, IV & V - Valves and their Habits
    
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The PCF80 is from the era of VHF television in the 1950s and early 1960s. The valve is a triode pentode with separate cathodes, designed to function as a mixer and oscillator in the tuner front end.
See also PCC84 for the corresponding pre-amplifier valve for Band III television tuners from the mid 1950s. With the commencement of ITV in 1955 and the use of Band III for the first time in the UK, there was great demand for these valves and all the major players produced the design.
The tiny triode anode can be seen on the right of the picture.
The thin glass tube envelope is 20 mm in diameter, and excluding the B9A base pins is 48 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 January 09, 2016.
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