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QQE03-20

Sensibly equivalent to:
11E15 AX9910 RS1019 SRS4452 TT20
    
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The QQE03-20 is a double beam transmitting tetrode. The design is of the European pattern and the valve is equivalent to the QQV03-20. The literature does not give any actual differences and so it appears to be the way the Dutch Philips company rated the heater as 6.3 Volt with the two valves in parallel. The UK versions by Mullard, owned by Philips, rates the heater as 12.6 volts centre tapped.
Another exhibit of this valve. Only the lettering looks different.
The wide glass tube envelope is 41 mm in diameter and, excluding the B7A base pins, is 53 mm tall.
Reference: Datasheet. Type QQE03-20 was first introduced in 1957.

 

Pin Connections
B7A
1
2
3
4
5
6
7
tc
tc
h
g1(2)
g2
k,bp
hct
g1
h
a
a(2)

 

Absolute Maximum Operating Conditions
Tetrode
Vh
Ah
Va
Vs
Vg
mAa
mAs
mAg
Pdriv
Pout
Pdiss
freq
f.max
6.3
1.3
600
250
-60
100
8
1.4
1.5W
48
20W
200
600
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated February 20, 2013.
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