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UU6

Sensibly equivalent to:
CV1413
See also:
Mazda UU6 & U403 Advert
    
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The UU6 full wave rectifier was produced from 1938 by Mazda and this exhibit shows the typical Mazda envelope and metalising.
Essentially the UU6 is a UU4 on an MO base. See UU6 for internal structure. Quite why they decided to metallise these rectifiers remains a mystery but the only obvious consequence was that they tended to overheat until the metallising corrected the problem by flaking off! This series of rectifiers was not as robust as the stalwart UU5, at least until the 1950s when Mazda seem to have realised that domestic HT rectifiers do not need metallisation.
See UU7.
The reverse is just metallic paint.
The maximum reservoir capacitor has to be 16 µF.
The classic envelope is 32 mm in diameter and, excluding the MO base pins, is 78 mm tall.
References: Datasheet, 1040 & 1043. Type UU6 was first introduced in 1938.

 

Pin Connections
MO
1
2
3
4
5
6
7
8
h,k
-
a(2)
-
a(1)
m
-
h

 

Absolute Maximum Operating Conditions
Rectifier
Vh
Ah
Va
mAa
4.0
1.4
350
120
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated September 14, 2013.
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