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ID = 81554
Tube type:  Oscilloscope CRT, picture tube   Indication 
Identical to DG7-31-01
Similar Tubes
Normally replaceable-slightly different:

Base Duodecal (12-pin), B12A (not glass)
Was used by Technology / Measurement
Filament Vf 6.3 Volts / If 0.3 Ampere / Indirect

The difference between DG7-31 and DG7-31-01 is the sensitivity of the deflection plates

Text in other languages (may differ)
Dimensions (WHD)
incl. pins / tip
69 x 172 x mm / 2.72 x 6.77 x inch
DG7-31-01: RTT 1974 (Franzis) 13. Auflage
Martin Renz

DG7-31-01: Manufacturers data
Patrice Zeissloff

from Just Qvigstad

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