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MU14

Sensibly equivalent to:
1867 AU4A CV1039 IW4 NU17 R3 UU120/350 UU120/500 UU5 UU60/250 VU39
See also:
Domestic Rectifiers
    
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M-OV's first indirectly-heated HT rectifiers were the MU12 and MU14. These were in fact the same valve but only a minority of each production batch were good enough to withstand the full rating when tested. These few were labelled MU14. This exhibit came in a wooden box as spares for a Marconi crystal calibrator.
The classic envelope is 43 mm in diameter and excluding the B4 base pins, is 103 mm tall.
References: Datasheet & 1040. Type MU14 was first introduced in 1933.

 

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

 

Absolute Maximum Operating Conditions
Rectifier
Vh
Ah
Va
mAa
4.0
2.5
500
120
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated December02, 2012.
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