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6AS7G

Sensibly equivalent to:
6520 6AS7 6N13S A1834 A4475 CV2523 CV2523 ECC230 EI834
See also:
Transformerless Amplifiers
    
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The 6AS7G is a double triode with special properties. The AC anode resistance is very low at 280 Ohms and the mutual conductance is considerable at 7.5 mA/V. This valve could be used in low voltage power supplies as a series pass device or it could be used for a direct drive audio amplifier. It would be useful to know its exact design use. The literature gives a single ended audio amplifier as its use.
each anode is a pair of finned flat U channels either side of the cathode assembly. The main picture shows the anodes for one triode side on.
Seen close up the grid wire can be seen to pass parallel to both cathode and anode. It is wound on stiff support rods.
The earliest reference we found was in the 1950 RCA data book.
The classic envelope is 46 mm in diameter and, excluding the IO base pins, is 105 mm tall.
References: Datasheet & 4040. Type 6AS7G was first introduced in 1946.

 

Pin Connections
IO
1
2
3
4
5
6
7
g1(2)
a(2)
k(2)
g1(1)
a(1)
k(1)
h

 

Absolute Maximum Operating Conditions
Triode
Vh
Ah
Va
Vg
mAa
ra
gm
6.3
2.5
135
-31.5
125
280
7.5
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated June 12, 2013.
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