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CV4009

Sensibly equivalent to:
5749 6BA6W CV454
    
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The CV4009 is a special quality version of the CV454 and is also known as the 5749 and the 6BA6W. It is a variable μ pentode for use at HF. Most probably as RF amplifiers in radio receivers.
The thin glass tube envelope is 17 mm in diameter and excluding the B7G base pins, is 45 mm long.
Reference: Datasheet.

 

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

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
gm
6.3
0.3
250
100
-1
11
4.4
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated October 14, 2013.
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