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EL822

Sensibly equivalent to:
21VO6 CV2382
    
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The EL822 output pentode is specified for video use, i.e. 5.5 MHz and wide bandwidth DC to 5.5 MHz. The impedance is high and so is the amplification factor is high. This valve with its 6.3 Volt heater may be designed for professional video.
This exhibit was made in the UK and has yellow lettering. The yellow paint was introduced for 1969 to celebrate 50 years of the Mullard company.
The control grid copper supports have heat sinks at the top. The notch in the anode reveals the tops of the three wire grids.
The suppressor grid is also wound on copper supports, but not the screen grid.
The thin glass tube envelope is 20 mm in diameter and, excluding the B9A base pins, is 70 mm tall.
References: Data-sheet & 1040. Type EL822 was first introduced in 1962.

 

Pin Connections
B9A
1
2
3
4
5
6
7
8
9
ic
g1
k
h
h
-
a
g2
g3

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
6.3
0.75
250
150
-2.5
40
5
0.1M
13
PDF scanned from an original document held by the museum
Updated July 08, 2020.
shape:thin.glass.tube construction:all.glass type:pentode age:1960.1975 base:b9a heater:6.3v pins:9 pin:1.ic pin:2.g1 pin:3.k pin:4.h pin:5.h pin:6.- pin:7.a pin:8.g2 pin:9.g3
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