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CV753

Sensibly equivalent to:
1A3 1D13 DA90
    
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The CV753 is a miniature diode on a B7G base and features a 1.4 Volt indirectly heated cathode. The prototype was the 1A3 and both Type designations appear on the glass.
The diode: the insulated heater is a single vertical strand within the cathode cylinder. The anode has side fins to anchor the anode and to provide heat dissipation. The working area is small.
The KB/D identifies this valve as being made to specification K1001 or K1006, the B denotes qualification by a UK authority and the D identifies the maker as Mullard Radio Valve Co., Mitcham.
The thin glass tube envelope is 18 mm in diameter and, excluding the B7G base pins, is 47 mm tall.
Reference: Data-sheet. Type CV753 was first introduced in 1943. See also 1943 adverts.

 

Pin Connections
B7G
1
2
3
4
5
6
7
h
a
k
nc
nc
a
h

 

Absolute Maximum Operating Conditions
Diode
Vh
Ah
Va
mAa
1.4
0.15
117
0.5
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated October 25, 2024.
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