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25Y5

Sensibly equivalent to:
CV942
    
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The 25Y5 is a pair of half wave rectifiers. The design has a greater spacing around the cathode compared with the 25Z5 to allow for European mains voltages and thus the 25Y5 was aimed at export rather than the US domestic market.
With a 300 mA heater requirement universal sets without a mains transformer would be the target market. In sets without mains transformers a full wave rectifier was not appropriate, however, it could be used as a voltage doubler on 110 Volt mains or as a paralleled pair on 230 Volts.
The base cap carries the Arctaurus brand. The style of octagon etched into the glass is identical to the RCA design.
A closer view showing the anode/cathode spacing. This can be contrasted with the 25Z5.
The classic envelope is 38 mm in diameter and, excluding the UX6 base pins, is 88 mm tall.
References: Data-sheet. Type 25Y5 was first introduced in 1941.

 

Pin Connections
UX6
1
2
3
4
5
6
h
a(1)
k(1)
k(2)
a92)
h

 

Absolute Maximum Operating Conditions
Rectifier
Vh
Ah
Va
mAa
25
0.3
450
75
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated September 23, 2020.
shape:classic construction:pinch type:rectifier.fw age:1940.1950 base:ux6 heater:300ma pins:6 pin:1.h pin:2.a pin:3.k pin:4.k pin:5.a92) pin:6.h
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