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EL90

Sensibly equivalent to:
6AQ5 BPM04 CV1862 N727
See also:
Brimar 6BE6, 6BA6, 6AQ5 & 6X4 Advert - Brimar 6BE6, 6BA6, 6AT6, 6AQ5 & 6X4 12BE6, 12BA6 12AT6, 35L6GT, 35W4, 6AK6, 1S5, 1U5, 3S4, 3V4, 1R5 & 1T4 Advert - Brimar 12AH8, 6BA6, 6AT6, 12AX7 & 6AQ5 Advert
    
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The EL90 is a small audio output beam tetrode valve capable of 4.5 Watts in a single ended configuration. The EL90 design is the classic 6V6 squeezed into the tiny B7G envelope. The small size means that the valve runs very hot.
The adverts show that Brimar made this valve as the 6AQ5, following the American Type designation, but here we see them marking the envelope with the Philips/Mullard code.
The thin glass tube envelope is 18 mm in diameter and excluding the B7G base pins, is 60 mm long.
References: Datasheet & 1040.

 

Pin Connections
B7G
1
2
3
4
5
6
7
g1
k,bp
h
h
a
g2
g1

 

Absolute Maximum Operating Conditions
Beam Tetrode
Vh
Ah
Va
Vs
Vg
mAa
gm
Pout
6.3
0.45
250
250
-12.5
45
4.1
4.5W
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated January 27, 2013.
shape:thin.glass.tube construction:all.glass type:beam.tetrode age:1940.1950 base:b7g heater:6.3v pins:7 pin:1.g1 pin:2.k.bp pin:3.h pin:4.h pin:5.a pin:6.g2 pin:7.g1
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