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7B6

Sensibly equivalent to:
CV882 DH81 DL82
See also:
Brimar 7B6 Box
    
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The 7B6 is a double diode triode, the design use was as detector, AGC rectifier and first audio voltage amplifier in broadcast superhet receivers and effectively was the 6Q7GT on the then new B8B or Loctal base.
The printed Brimar identification. Within the triode is at the top with the diodes placed at the bottom. The locating pip is on the metal skirt in line with the locating strip on the spigot.
The actual diode anodes are short vertical rods within the outer case. The latter is connected to the cathode.
The wide glass tube envelope is 28 mm in diameter, and excluding the B8B base pins is 56 mm tall.
References: Datasheet, 1040 & 4018.

 

Pin Connections
B8B
1
2
3
4
5
6
7
8
h
a
g1
-
a(d1)
a(d2)
k
h

 

Absolute Maximum Operating Conditions
Triode
Vh
Ah
Va
Vg
mAa
ra
gm
μ
6.3
0.3
250
-0.68
1.0
58,000
1.2
70
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated January 05, 2016.
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