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CV3798

Sensibly equivalent to:
0A3 QS1205 VR75/30
    
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The CV3798 is a 75 volt voltage stabiliser tube. The prototypes for this stabiliser were the OA3 and the VR75-30.
The striking voltage is 100 but a supply of 105 volts is suggested to take into account tolerances. The minimum current is 5 mA and in the working range of 5 - 40 mA the voltage regulation is 5 Volts.
The marking on the side is EEVC 214 - possibly this was made be English Electric.
The this mark is an 8 in a circle. The construction of the neon stabiliser is as a bright cylinder with central second electrode.
The classic envelope is 37 mm in diameter and, excluding the IO base pins, is 87 mm tall.
References: Data-sheet, 1040 & 3002. Type CV3798 was first introduced in 1943.

 

Pin Connections
IO
1
2
3
4
5
6
7
8
-
k
ic
-
a
-
ic
-

 

Absolute Maximum Operating Conditions
Stabiliser
Va
mAa
75
5-40
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated May 24, 2019.
shape:classic construction:pinch type:voltage.stabiliser age:1930.1940 base:io pins:8 pin:1.- pin:2.k pin:3.ic pin:4.- pin:5.a pin:6.- pin:7.ic pin:8.-
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