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TP25

Sensibly equivalent to:
BVA172 CV1345
    
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The Mazda TP25 is a triode pentode frequency changer for battery operated broadcast receivers. The special feature of this self oscillating mixer is the low filament consumption.
This is another example of the zinc painted TP25 but this has legible black paint to identify it.
The classic envelope is 31 mm in diameter and, excluding the MO base pins, is 86 mm tall.
References: Datasheet, 1040 & 1043. Type TP25 was first introduced in 1938.

 

Pin Connections
MO
1
2
3
4
5
6
7
8
tc
f-
-
a
a(t)
g1(t),g3
m
g2
f+
g1

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
2.0
0.2
120
60
-1.5
0.58
0.92
1.3M
0.26

 

Absolute Maximum Operating Conditions
Triode
Va
mAa
80
2.5
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated February 15, 2014.
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