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UU3

Sensibly equivalent to:
IW4-350 R2
See also:
Murphy Radio
    
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The UU3 was a stalwart used in tens of thousands of (smaller) Murphy sets during the later 1930s. Lots of UU3s survive, mostly in good working order. Note the characteristic shapes of the glass envelopes.
The UU3 full wave rectifier was designed for an input of 250 Volts RMS, and an output current of 60 mA.
The balloon envelope is 54 mm in diameter and, excluding the B4 base pins, is 96 mm tall.
Reference: 1043. Type UU3 was first introduced in 1934. See also 1934 adverts.

 

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
2.2
250
60
Updated April 08, 2013.
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