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SU2150A

Sensibly equivalent to:
CV1120 CV1290 NU33 VU120
See also:
CV1290 short entry
    
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Cossor designed and made EHT rectifiers such as the SU2150A for use in CRT power supplies. Because the Cossor works tended to employ skilled glass-blowers rather than just factory girls, and because they were designing for a very limited market, the Cossor EHT rectifiers were designed to be hand made. Although naive looking they were electrically robust and entirely successful in their intended application.
The SU2150 was made for a higher anode voltage but smaller maximum current.
The plastic top cap and screw connection places this exhibit in the early 1930s as does the style of paper identification. Later production SU2150As adopted the standard metal top cap connection.
The saddle anode is connected to the top cap and is supported on glass pillars. The cathode assembly is always at least 6 mm distant from the anode, and is a horizontal rod. The maximum reservoir capacitor is 0.25 µF, and the minimum series resistance is 10,000 Ω.
The balloon envelope is 50 mm in diameter and, excluding the B4 base pins, is 126 mm tall.
References: Datasheet 1040 & 1043.

 

Pin Connections
B4
1
2
3
4
tc
-
-
h,k
h
a

 

Absolute Maximum Operating Conditions
Rectifier
Vh
Ah
Va
mAa
2.0
1.5
5000
10
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated April 09, 2015.
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