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6BZ7

Sensibly equivalent to:
6BQ7A 6BS8 6T27
    
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The 6BZ7 is a double amplifier triode designed for cascode operation is VHF television tuners. The standard European valve for this task was the PCC84. The 4BZ7 was electrically the same but the heater rating was 600 mA at 4.2 Volts for series heater chains.
Behind the front triode is the screen. It looks as if the anode is recessed but in fact the front plate is flat.
The thin glass tube envelope is 21 mm in diameter and, excluding the B9A base pins, is 46 mm tall.
Reference: Data-sheet. Type 6BZ7 was first introduced in 1956.

 

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

 

Absolute Maximum Operating Conditions
Triode
Vh
Ah
Va
Vg
mAa
ra
gm
μ
6.3
0.4
250
-7
20
5,300
6.8
36
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated February 18, 2021.
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