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20P1

 
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The 20P1 is a purpose designed self oscillating television line output valve. It is designed to withstand a positive anode surge voltage of 6 kV and a negative grid surge of -1.5 kV. The screen grid can dissipate 5 W.
This valve would be seen in television receivers of the 1950s.
The classic envelope is 50 mm in diameter and, excluding the IO base pins, is 120 mm tall.
References: Datasheet & 1040. Type 20P1 was first introduced in 1951.

 

Pin Connections
IO
1
2
3
4
5
6
7
8
tc
-
h
-
g2
g1
-
h
k
a

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Pdiss
38
0.2
400
250
15W
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated January 18, 2013.
shape:classic construction:pinch type:pentode age:1950.1960 base:io heater:200ma pins:8 pin:1.- pin:2.h pin:3.- pin:4.g2 pin:5.g1 pin:6.- pin:7.h pin:8.k pin:tc.a
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