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6BR8A

Sensibly equivalent to:
6FV8A
See also:
Philips 6BR8A Box
    
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The 6BR8A was designed for VHF TV tuners. The triode being the local oscillator and the pentode (made as a beam tetrode) acting as the mixer to IF.
The bright plate seen within the dark anode is the beam plate. The two wire grids are wound on copper supports.
The small triode is on the left. The grid is wound on copper supports.
The thin glass tube envelope is 20 mm in diameter, and excluding the B9A base pins is 47 mm tall.
Reference: Datasheet. Type 6BR8A was first introduced in 1958.

 

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

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
6.3
0.45
125
110
-1.0
9.5
3.5
0.2M
5.0

 

Absolute Maximum Operating Conditions
Triode
Va
Vg
mAa
gm
μ
125
-1.0
13.5
7.5
40
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated September 23, 2015.
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