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4304CB

Sensibly equivalent to:
8019 BW11 CV315 CV1062 CV1252 CV1288 CV1619 DET12 NT58 TSW50/A TY1-50 VT62
    
Extras ▼

 

The 4304CB transmitting valve has a directly heated thoriated tungsten filament. The electrodes are sealed into a glass pinch. The B4 base is also seen at the bottom of the picture.
The anode is of carbon and can dissipate 50 Watts. The high operating voltage leads to the placing of the anode connection on the top cap. The grid is moved to a top cap connection in order to allow the valve to operate at high frequency.
The valve is a 1930s design and this exhibit was marked for commercial use. Military versions existed as VT62 and NT58 before the CV designations were introduced in 1941.
The valve was used as a power oscillator as well as a power amplifier and in pulse mode for early 200 MHz radar.
The balloon envelope is 66 mm in diameter and, excluding the B4 base pins, is 145 mm tall.
References: Datasheet.

 

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

 

Absolute Maximum Operating Conditions
Triode
Vh
Ah
Va
Vg
mAa
Pdriv
Pdiss
Pout
freq
f.max
7.5
3.25
1250
-225
90
4.5W
50
75
20
330
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated January 08, 2013.
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