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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 M-OV DET12 is a VHF transmitting triode. The data-sheet is of the similar 834.
The graphite anode dissipation is 50 Watts.
The envelope has the CV1288 marked on it and there are vertical lines in the glass that look to be where the two halves of a mould came together.
The graphite anode is fixed by a metal support running the whole length and tightened by thin wire wrapped round the bulb end. The control grid is wound on two supports. The once helical filament is now just small pieces of wire in the envelope.
Minimising lead inductance is achieved by bring the control grid to a top cap as well as the anode.
The grid top cap is at the top of the image.
The standard notch and peen marks on the grid supports. The base of the filament is still in place.
The balloon envelope is 65 mm in diameter and, excluding the B4 base pins, is 150 mm tall.
References: Data-sheet, 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 March 23, 2021.
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