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VT60

Sensibly equivalent to:
5B/250A 807 CV1060
See also:
Beam Tetrodes and the 807 - CV1060 short entry
    
Extras ▼

 

The VT60 is an 807 for the pre-war UK RAF. The 10E/1144 is the old RAF stores code.
The parameters given are for single ended use. When used in a class AB1 as a push pull pair with 600 volts on the anode an output power of 65 Watts was normal.
These valves were much used in medium power amateur radio transmitters for high level modulation. In this use the output transformer, called a modulation transformer, would be impedance matched to the anode circuit of the RF power valve. The audio power would increase or decrease the amplitude of the RF envelope.
The classic elliptical lower screen of the 807 seen above the pinch. The base is ceramic and thus less likely to absorb moisture - a prerequisite for airborne use.
The ribbed anode, lower mica disc and elliptical lower screen.
Here the two wire inner grids are visible as is the bright beam plate either side of the grids.
The ceramic UX5 base.
The classic envelope has a maximum diameter of 50 mm and a length, excluding the UX5 base pins, to the tip of the top cap of 126 mm.
References: Datasheet & 1040.

 

Pin Connections
UX5
1
2
3
4
5
tc
h
g2
g1
k
h
a

 

Absolute Maximum Operating Conditions
Beam Tetrode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
Pout
6.3
0.9
300
250
-14
83
8
20k
6.5
6.7W

 

Absolute Maximum Operating Conditions
Beam Tetrode
Vh
Ah
Va
Vs
Vg
mAa
mAs
mAg
Pdriv
Pdiss
Pout
freq
f.max
6.3
0.9
600
250
-45
100
7
3.5
0.2W
25W
40W
60
125
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated April 29, 2019.
shape:classic construction:pinch type:beam.tetrode age:1930.1940 base:ux5 heater:6.3v pins:5 pin:1.h pin:2.g2 pin:3.g1 pin:4.k pin:5.h pin:tc.a
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