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DET12

Sensibly equivalent to:
4304CB 834 CV1062 CV1288 NT58 TY1-50 VT62
See also:
CV1062 short entry - CV315 short entry - CV1235 short entry
    
Extras ▼

 

The Marconi branded M-OV DET12 is a VHF transmitting triode. The datasheet is of the similar 834.
The anode dissipation was 50 Watts.
The graphite anode connects to one top pin and the control grid to the other. The paper sticker identifies the valve as having been part of BBC stock in 1957 and that it was supplied on 23/07/1943.
The large Marconi logo. The milky colour of the getter tells us that the vacuum has failed.
Looking into the base of the graphite anode the helical filament and control grid can be seen.
A different view of the filament and control grid. The bright filament is thoriated tungsten wire. The grid wire is corroded.
The top connections. The filament top support can be seen and the helical filament attached to it.
The balloon envelope is 64 mm in diameter and, excluding the B4 base pins, is 140 mm tall.
References: Datasheet, 1005 & 4001.

 

Pin Connections
B4
1
2
3
4
tc
tc
-
f
f
-
g1
a

 

Absolute Maximum Operating Conditions
Triode
Vh
Ah
Va
Vg
mAa
Pdiss
Pdriv
Pout
freq
f.max
7.5
3.2
1000
-170
100
50w
6w
70W
100 MHz
300 MHz
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated April 09, 2015.
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