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9D7

Sensibly equivalent to:
CV5409
    
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The 9D7 is a variable μ pentode. Brimar do not give a designated frequency range in their literature. As variable μ pentodes are used in AGC amplification systems, this suggests a role in IF amplification at up to 10.7 MHz.
The thin glass tube envelope is 20 mm in diameter and, excluding the B9A base pins, is 47 mm tall.
References: Datasheet, 3002 & 1040. Type 9D7 was first introduced in 1958.

 

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

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
mAa
gm
6.3
0.3
250
100
10
8.4
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated January 31, 2013.
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