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CV788

Sensibly equivalent to:
832A C180 QQV04-15
    
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This valve, a dual transmitting tetrode, arrived as part of a pair, both additionally marked on the envelope as 832A, with a QQE04-20.
The design is of the American type with two separate valves sealed into the single element. Additionally the valve is probably of American manufacture as the envelope bulge is characteristic. The oval cylinder anodes enclose the beam plates, grids and heater cathode assembly. This type of construction usually required external capacitors to neutralise parasitic oscillations. These normally being vertical wires alongside the envelope.
This valve was obsolete by the start of the 1960s replaced by the QQV03-20 or QQV06-40A varieties. It is typical of these RF power tetrodes that the base connections all match one another.
The wide glass tube envelope is 56 mm in diameter and, excluding the B7A base pins, is 52 mm tall.
References: 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
1.6
750
250
-65
90
14
2.6
0.18W
26
15W
200
250
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated October 08, 2013.
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