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TP2620

 
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This triode pentode was designed as a frequency changer for superhet receivers. The pentode has a high anode resistance and low mutual conductance, whilst the triode was designed for use as local oscillator.
This valve is essentially identical to the type AC/TP except for heater rating. A very robust Medium and Long Wave workhorse intended for simpler AC/DC superhets. Not intended for SW use.
The reverse is plain zinc paint.
The classic envelope is 45 mm in diameter and, excluding the B9 base pins, is 106 mm tall.
References: Datasheet & 1043. Type TP2620 was first introduced in 1934.

 

Pin Connections
B9
1
2
3
4
5
6
7
8
9
tc
g2
a
g3
h
h
k
a(t)
g1(t)
m
g1

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
26.0
0.2
250
200
-5
6.5
2.5
0.9M
0.7

 

Absolute Maximum Operating Conditions
Triode
Va
mAa
150
1.5
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated October 12, 2018.
shape:classic construction:pinch type:triode.pentode age:1930.1940 base:b9 heater:200ma pins:9 pin:1.g2 pin:2.a pin:3.g3 pin:4.h pin:5.h pin:6.k pin:7.a(t) pin:8.g1(t) pin:9.m pin:tc.g1
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