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6AU8

 
    
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The 6AU8 is a general purpose triode pentode for use in 600 mA heater chain television receivers. In Europe the standard was 300 mA heater chains as the mains voltage is approximately 230 Volts. In America with 110 Volt mains a 600 mA heater chain made better sense. Thus we conclude that this valve was for the American market and 525 line televisions.
The 7060 has similar characteristics but a heater especially designed for 12-15 volt battery supplies in mobile communications equipment.
On the left is the pentode with the twin anode plates connected by a pair of straps. The smaller triode system is on the right of the picture.
The thin glass tube envelope is 21 mm in diameter, and excluding the B9A base pins is 60 mm tall.
Reference: Datasheet. Type 6AU8 was first introduced in 1953.

 

Pin Connections
B9A
1
2
3
4
5
6
7
8
9
k
g1(t)
a(t)
h
h
k,g3,s
g1
g2
a

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
6.3
0.6
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated November 28, 2014.
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