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VT79

Sensibly equivalent to:
CV1079 KT807 KT8C
    
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The VT79 is a beam tetrode based on the KT8 and fitted with a ceramic base cap. The upper frequency limit is 65 MHz. In 1941 with the advent of the CV register that unified the UK service procurement of valves the RAF VT79 became the Common Valve CV1079.
The M-OV KT8 was based on the American 807 and was not as good.
The side view of the anode. Note the box screen below the lower mica. The etched lettering is contained within the distinctive M-OV elipse.
The classic envelope is 50 mm in diameter, and excluding the B5 base pins is 150 mm tall.
Reference: Datasheet.

 

Pin Connections
B5
1
2
3
4
5
tc
g2
g1
h
h
k
a

 

Absolute Maximum Operating Conditions
Tetrode
Vh
Ah
Va
Vs
Vg
mAa
mAs
Pdriv
Pdiss
Pout
freq
f.max
6.3
1.25
600
300
-100
85
6.0
0.5
25
38
25MHz
65MHz
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated December16, 2016.
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