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EL-36

Sensibly equivalent to:
CV2940
    
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The Mullard EL-36 (EL36) is an audio output pentode from 1940. Mullard produced a television line output valve in the 1950s that was also called an EL36. The two are quite different and the line output valve has a top cap connection for the anode.
The audio output pentode would have a load impedance of 3,500 Ω as a single ended valve (top set of parameters) and load of 5,500 Ω a-a for a class A push pull amplifier (second set of parameters). In both cases the cathode resistance is 90 Ω. The single ended amplifier is rated for an output of 8.0 Watts and the push pull version at 14.5 Watts.
The EL36 has the same pin connections as the EL37 that dates to 1946 and has a greater output and a 25 Watt anode dissipation. The EL37 was superseded in 1952 by the EL34.
The valve carries a reseller's label - BAF - the Type designation of EL985 cannot be found in the available literature.
The top of the valve. The upper mica grips the envelope. The control grid is wound on copper supports and has a heat radiator fitted. The cathode tube is machined to a small diameter to fit into the electrode supporting mica sheet.
The classic envelope is 44 mm in diameter and, excluding the IO base pins, is 110 mm tall.
Reference: 1043. Type EL-36 was first introduced in 1940.

 

Pin Connections
IO
1
2
3
4
5
6
7
8
m
h
a
g2
g1
nc
h
k,g3

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
6.3V
1.2
250
250
-7.0
72
8.0
20,000
14.5

 

Absolute Maximum Operating Conditions
Pentode
Va
Vs
Vg
mAa
mAs
250
250
-7.0
45
5.1
Updated October 04, 2020.
shape:classic construction:pinch type:pentode age:1930.1940 base:io heater:6.3v pins:8 pin:1.m pin:2.h pin:3.a pin:4.g2 pin:5.g1 pin:6.nc pin:7.h pin:8.k.g3
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