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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 unusual feature is the B9 base.
The classic envelope is 43 mm in diameter and, excluding the B9 base pins, is 104 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 January 31, 2013.
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