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APV4

Sensibly equivalent to:
1867 1W4-350 CV1039 MU14 R3 R42 UU5
    
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The APV4 is the Tungsram implementation of this very common power rating indirectly-heated full wave HT rectifier.
One side of the heater is connected to the cathode. The anode cavities are each made from two black pressed plates. This rectifier is designed to work into a maximum reservoir capacitor of 8 µF.
This type of rectifier was used in larger radios from the mid-1930s and remained in the lists until the 1960s.
The image shows both anodes, they are mounted parallel to each other but offset either side of a centre line.
The classic envelope is of classic shape and 45 mm in diameter. The length excluding the B4 base pins, is 98 mm.
References: Datasheet & 1040. Type APV4 was first introduced in 1936.

 

Pin Connections
B4
1
2
3
4
a(1)
a(2)
f
f

 

Absolute Maximum Operating Conditions
Rectifier
Vh
Ah
Va
mAa
4.0
2.3
400
120
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated November 18, 2012.
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