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ATP5

Sensibly equivalent to:
CV1367 V245
    
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The ATP5 is a small transmitting pentode made to a late 1930s British Army specification for use in portable field radios running from relatively light batteries. It is probable that this valve is intended to operate as the final RF amplifier of a very simple type of transmitter in which a small crystal (or hand-tuned) RF oscillator drives G1 and where voice modulation from a carbon-type microphone is applied to G3.
That the sample shown was made by Mazda is evident from the characteristic shape of the envelope as well as by the marking.
This valve has no common civilian equivalent.
The classic envelope is 38 mm in diameter and, excluding the B7 base pins, is 114 mm tall.
References: Private communication & 3002.

 

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
Pdiss
3.0
0.3
450
250
-1
20
6
5W
Updated December14, 2012.
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