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DM71

Sensibly equivalent to:
1M1 1M3 Y25
    
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The DM71 is a subminiature tuning indicator. It was designed for use in FM tuners, tape recorders etc. It features high sensitivity.
The exclamation mark cut-out allows the glow to be seen.
The thin glass tube envelope is 10 mm in diameter, and excluding the base pins is 43 mm tall.
References: datasheet & 3002. Type DM71 was first introduced in 1952.

 

Pin Connections
1
2
3
4
5
6
7
8
g1
ic
-
f
f
-
-
a

 

Absolute Maximum Operating Conditions
CRT
Vh
Ah
Va
Vg
mAa
1.4
0.025
250
-10
0.3
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated February 02, 2013.
shape:thin.glass.tube construction:all.glass type:tuning.indicator age:1950.1960 base: heater:1.4v pins:8 pin:1.g1 pin:2.ic pin:3.- pin:4.f pin:5.f pin:6.- pin:7.- pin:8.a
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