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PCF86

Sensibly equivalent to:
8HG8
See also:
Valves and their Habits - Frame Grid Valves
    
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The Mullard PCF86 is a miniature VHF TV frequency changer and was made in the UK. It has been designed for the triode oscillator to supply 3.2 Volts peak to peak to the pentode mixer section. The PCF806 is an improved form of the PCF86.
The frame grid pentode is on the left with the triode on the right.
The copper strut from pin 9 connects to the screen grid above the top mica. The coiled heater can be seen above the base.
The thin glass tube envelope is 20 mm in diameter and, excluding the B9A base pins, is 47 mm tall.
References: Datasheet, 3002 & 1040. Type PCF86 was first introduced in 1960.

 

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

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
8.0
0.3
190
140
-1.5
8.5
2.7
0.35M
4.5

 

Absolute Maximum Operating Conditions
Triode
Va
mAa
120
6.0
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated April 17, 2014.
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