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4TP

Sensibly equivalent to:
CV827
    
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The 4TP is a triode pentode for use in time bases.
A closer view.
The B7 base.
Thanks to Mark Mallison for sending the images.
The classic envelope is  mm in diameter and, excluding the B7 base pins, is  mm tall.
Reference: 1043. Type 4TP was first introduced in 1939. See also 1939 adverts.

 

Pin Connections
B7
1
2
3
4
5
6
7
tc
nc
g1(t)
a(t)
h
h
k
g2
g1

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
gm
4.0
1.4
150
150
-5.0
16.0
-
4.5

 

Absolute Maximum Operating Conditions
Triode
Va
mAa
100
4
Updated January 09, 2022.
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