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6DS8

Sensibly equivalent to:
ECH83
    
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The 6DS8 / ECH83 is a triode heptode frequency changer has the unusually low anode voltage of 12.6 Volts, the voltage of vehicle batteries. This valve was clearly designed for use in such an environment, Mullard describe it as being designed for use as a mixer in hybrid car radios.
See also EBF83, ECC86 and EF98.
The thin glass tube envelope is 20 mm in diameter and excluding the B9A base pins the valve is 59 mm tall.
References: Data-sheet & 1040. Type 6DS8 was first introduced in 1957. See also 1957 adverts.

 

Pin Connections
B9A
1
2
3
4
5
6
7
8
9
g2,g4
g1
k,g5,s
h
h
a
g3
a(t)
g1(t)

 

Absolute Maximum Operating Conditions
Heptode
Vh
Ah
Va
Vs
mAa
mAs
ra
gm
6.3
0.3
12.6
12.6
0.15
0.35
1.5M
0.2
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated January 28, 2019.
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