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IW3

Sensibly equivalent to:
CV1039 R2 UU5
    
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The IW3 is a full wave rectifier from the early days of mains radios with the 4.0 Volt heater that was standard at the time. With a current rating of 120 mA at 350 Volts this would have powered a substantial piece of equipment.
The picture shows the top view of the envelope. The heater rating is clearly shown.
The balloon envelope is 52 mm in diameter and, excluding the B4 base pins, is 105 mm tall.
References: 4023 & 1043. Type IW3 was first introduced in 1933.

 

Pin Connections
B4
1
2
3
4
a(1)
a(2)
h,k
h

 

Absolute Maximum Operating Conditions
Rectifier
Vh
Ah
Va
mAa
4.0
2.4
350
120
Updated January 04, 2013.
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