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6BA6

Sensibly equivalent to:
5749 CV454 EF93 PM04 W727
    
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The 6BA6 is a variable μ amplifier pentode for HF use. This is a re-badged valve of unknown manufacture, as Bentley were resellers and not manufacturers.
Looking into the anode the control grid can be seen in the top window very close to the cathode. The screen grid and suppressor grid are also clearly seen with increasing diameters and reduced pitch.
The thin glass tube envelope is 18 mm in diameter and, excluding the B7G base pins, is 52 mm tall.
References: Datasheet, 3002 & 1040. Type 6BA6 was first introduced in 1950.

 

Pin Connections
B7G
1
2
3
4
5
6
7
g1
g3
h
h
a
g2
k

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
6.3
0.3
250
100
-1.0
11.0
4.2
1.5M
4.4
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated February 02, 2013.
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