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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.

 

Pin Connections
B7
1
2
3
4
5
6
7
tc
-
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 October 13, 2019.
shape:classic construction:pinch type:triode.pentode age:1930.1940 base:b7 heater:4.0v pins:7 pin:1.- pin:2.g1(t) pin:3.a(t) pin:4.h pin:5.h pin:6.k pin:7.g2 pin:tc.g1
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