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IFW4A

 
    
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The Radio Record IFW4A is an indirectly heated full wave rectifier.
The twin rectifier sections. The cathode tubes reduce in diameter to pass into holes in the top mica.
The side view. The label indicates a good valves when last tested.
The classic envelope is 42 mm in diameter and, excluding the B4 base pins, is 99 mm tall.
Reference: Data.

 

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
2.0
400
120
Updated November 26, 2024.
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