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ATP7

Sensibly equivalent to:
CV1368 V266
    
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We know that ATP denotes an Army Transmitting Pentode and that it dates from the late 1930s. It was still in operational use in the early 1940s as it was given a CV designation under the common valve initiative. The ATP7 is a selected Mazda V226 where the selection is that the mutual conductance is a minimum of 3.0.
Internally the three wire grids can be seen within the oval sheet metal anode. The valve is directly heated, possibly thoriated tungsten, the wire passes through the electrodes four times.
The type designation is printed on a band of external metalisation.
The classic envelope is 44 mm in diameter and, excluding the B7 base pins, is 124 mm tall.
References: 3002 & tubecollector.org.

 

Pin Connections
B7
1
2
3
4
5
6
7
tc
-
g1
g3
f
f
-
g2
a

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
6.0
0.2
600
300
-5
14.0
-
1M
3.0
Updated December14, 2012.
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