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EBF83

Sensibly equivalent to:
6DR8
See also:
Mullard EBF83 Box
    
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The EBF83 is normal looking exhibit that disguises a very unusual low voltage double diode pentode valve. The 12.6 Volt anode rating, coupled with a standard 6.3 V 0.3 A heater, indicates operation from a vehicle battery and the car radio is the obvious application. This is confirmed by Mullard who describe this valve as being designed for use in hybrid car radio applications.
The mesh screen obscures the construction but through the two holes in the mesh can be seen the pentode at the bottom and the two small diode anodes above.
See also ECC86, ECH83 and EF98.
The thin glass tube envelope is 20 mm in diameter and, excluding the B9A base pins, is 60 mm tall.
References: Datasheet & 1040. Type EBF83 was first introduced in 1957.

 

Pin Connections
B9A
1
2
3
4
5
6
7
8
9
g2
g1
k,s
h
h
a
a(d1)
a(d2)
g3

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
mAa
mAs
ra
gm
6.3
0.3
12.6
12.6
0.45
0.14
1M
1
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated January 23, 2013.
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