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9D2

Sensibly equivalent to:
12VPA ARP3 C50N CV1106 CV1321 VP1322 VP13C VR106
See also:
Brimar Ten Times Tested Advert - CV1106 short entry
    
Extras ▼

 

The 9D2 is a variable μ RF pentode. The 200 mA heater requirement indicates that this valve was designed for series heater chain use.
The Brimar Logo, BVA logo and Made in England.
The outer screen is connected to the screening disc in the centre above the pinch.
A change of lighting reveals the cylindrical anode just inside of the screen and the wire grids at the centre.
The top of the valve has a second screen cap. The tops of the three grid supports can be seen. The suppressor grid is closer to the screen grid than the anode.
The classic envelope is 38 mm in diameter, and excluding the B7 base pins is 96 mm tall.
References: Datasheet & 1043. Type 9D2 was first introduced in 1934.

 

Pin Connections
B7
1
2
3
4
5
6
7
tc
-
a
g3
h
h
k
g2
g1

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
μ
13
0.2
250
125
-1
10.0
3.5
0.6M
1.65
1,000
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated October 11, 2018.
shape:classic construction:pinch type:pentode age:1930.1940 base:b7 heater:200ma pins:7 pin:1.- pin:2.a pin:3.g3 pin:4.h pin:5.h pin:6.k pin:7.g2 pin:tc.g1
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