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PC86

Sensibly equivalent to:
4CM4
See also:
Valves and their Habits - The PC97 Tutorial - Mullard Triodes for UHF Tuners - PC86 and PC88 Advert - Valves for Dual Standard TVs
    
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The PC86 is a purpose designed UHF oscillator triode for television reception. Mullard describe the PC86 as: a UHF frame-grid mixer/oscillator triode. This exhibit has the older logo and was an import. However, at the time the phrase used was Foreign Made.
The anode end view. There is an internal screen to ensure that the working electron flow is directly to the anode in front of the grid.
The working faces of the anode are very close to the grid with the heat radiating portions much further away.
The thin glass tube envelope is 21 mm in diameter and excluding the B9A base pins, is 48 mm long.
References: Datasheet & 1040. Type PC86 was first introduced in 1962.

 

Pin Connections
B9A
1
2
3
4
5
6
7
8
9
a
g1
k
h
h
g1
k
g1
a

 

Absolute Maximum Operating Conditions
Triode
Vh
Ah
Va
Vg
mAa
ra
gm
3.8
0.3
175
-1.5
12
4850
3.6
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated September 07, 2016.
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