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Colomor

6X5GT


Brian Middleton Valve Gift
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Sensibly equivalent to:- CV574
 
 
 
This exhibit was last updated on 01 February 2013
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The 6X5GT is a standard HT rectifier for low power AC mains driven equipment. It was of a type made by several manufacturers. In this case the manufacturer is unknown. Colomor is a resale company based in the UK.
In use the output of a centre tapped transformer would be applied to the anodes, the rating given is 325-0-325, the common cathode would be the output for the rectified voltage. A effective series resistance of 350 Ohms was required to limit surges and the reservoir capacitor had to be restricted to 16 µF.
The picture shows the common cathode tube and the anode construction. Both anodes are formed from two shaped sheets, probably of nickel. The anodes are mounted at right angles for maximum cooling. Original samples have the anodes mounted in line vertically. The envelope is only 57 mm tall and this is about 12 mm shorter than other makes. Internally the assembly is on a pressed glass disc with a central exhaust tube and this allows the shorter envelope.
The wide glass tube envelope is 27 mm in diameter and excluding the IO base pins the valve is 57 mm tall.
References: Datasheet, 1040 & 1043. Type 6X5GT was first introduced in 1936.
 
Pin Connections
IO
1
2
3
4
5
6
7
8
m
h
a(2)
-
a(1)
-
h
k
 
Absolute Maximum Operating Conditions
Rectifier
Vh
Ah
Va
mAa
6.3
0.6
325
70

Thanks to Frank Philipse for supplying the above PDF datasheet
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