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EL84

Sensibly equivalent to:
6BQ5 6P15 CV2975 N709
See also:
RTRA EL84 box - A Small High Quality Amplifier - Transformerless Amplifiers
    
Extras ▼

 

The EL84 output pentode was introduced by Mullard in 1954. Here is version branded RTRA, and it is possible that this was a foreign made import distributed through the trade association.
This exhibit came in an RTRA box and still has part of the RTRA logo on the glass. The Radio Trades Retailers' Association was formed in 1942.
This is a true pentode and all three grids can be seen.
The thin glass tube envelope is 21 mm in diameter and, excluding the B9A base pins, is 71 mm tall.
References: Datasheet & 1040. Type EL84 was first introduced in 1953.

 

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

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
gm
Pout
Pdiss
6.3
0.76
250
250
-7.3
48
5.5
6.7
2.2
1.2W
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated April 01, 2014.
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