▼ Menu

MU14

Sensibly equivalent to:
1867 AU4A CV1039 IW4 NU17 R3 UU120/350 UU120/500 UU5 UU60/250 VU39
See also:
Domestic Rectifiers
    
Extras ▼

 

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.
Initial production was in this balloon shape but later production moved to the classic style as in MU14.
The anodes are made from wire woven into a mesh and supported on stout wire supports. The top of the anodes are held in a mica support. Note that the mica is not held by the envelope as would be the case with later envelope designs.
The osram label on the envelope and within is one of the anodes seen face on
The balloon envelope is 56 mm in diameter and excluding the B4 base pins, is 118 mm tall.
References: Datasheet & 1043. 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 December03, 2012.
Return to Main Index