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CV2799

Sensibly equivalent to:
6252 C1134 QQV03-20A TT20
    
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The CV2799 is a double beam transmitting tetrode following the European pattern of a central flat cathode surrounded by a split control grids (one half per valve), a common screen grid beam forming plates and two wing shaped anodes.
The anodes are finned for good heat dissipation and the anodes are brought out to pin like top caps with stout struts for both rigid support and to aid cooling by conduction.
The heater runs at 6.3 Volts when both halves are in parallel or 12.6 Volts when in series. For 6.3 volts pins 1 & 7 are connected together with pin 5 as the other end. For 12.6 Volt operation the voltage is connected to pins 1 & 7 with pin 5 left unconnected.
In addition to use as transmitter power amplifiers the upper frequency of 600 MHz made them popular for frequency multiplication.
The pin entering the centre of the picture from the right connects to the dark beam forming plates.
See also QQV03-20 and CV2799.
The wide glass tube envelope is 44 mm in diameter and, excluding the B7A base pins and top pins is 55 mm tall.
Reference: Datasheet.

 

Pin Connections
B7A
1
2
3
4
5
6
7
tc
tc
h
g1(2)
g2
k,bp
hct
g1
h
a
a(2)

 

Absolute Maximum Operating Conditions
Tetrode
Vh
Ah
Va
Vs
Vg
mAa
mAs
mAg
Pdriv
Pout
Pdiss
freq
f.max
6.3
1.3
600
250
-60
100
8
1.4
1.5W
48
20W
200
600
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated October 13, 2013.
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