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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 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.
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