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CV2799

Sensibly equivalent to:
6252 C1134 QQV03-20A TT20
See also:
VHF Valve Anode Connector
    
Extras ▼

 

The CV2799 is a double beam transmitting tetrode.
Following the European pattern, a central flat cathode is surrounded by a split control grid (one half per valve), a common screen grid is wound next. The two beam forming plates can be seen either side of the central assembly. The anodes are finned for good heat dissipation and clearly separated from the central structures, the anodes are brought out to pin like top caps.
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.
The side view shows the angled anode plates that have been carbonised for greater radiating efficiency.
In addition to use as transmitter power amplifiers the upper frequency of 600 MHz made them popular for frequency multiplication.
See also QQV03-20.
The wide glass tube envelope is 40 mm in diameter and, excluding the B7A base pins and top pins is 52 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 December11, 2015.
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