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ID = 33074
Brand: Siemens (& Halske, -Schuckert Werke SSW, Electrogeräte); Berlin, München
Tube type:  Thyratron 
Identical to Ste2500/05/2 = ST17
Similar Tubes
Normally replaceable-slightly different:
  5557 ; FG17

Base UX-Base (4 Pins (2 thick, USA 1924, UX) Top contact with a cap.
Was used by Industrial
Filament Vf 2.5 Volts / If 5 Ampere / Direct

This tube is a negative control mercury vapor thyratron for use where it is desired to actuate the tube with a change in negative grid voltage. It requires relatively little grid power and is suitable for use in relay circuits where current flow is desired in theabsence of grid exitation.

Text in other languages (may differ)
Weight 85 g / 3.00 oz
Information source - - Manufacturers Literature   
Ste2500/05/2: K.K.
Anonymous 719 Collector

Ste2500/05/2: Fin Stewart
Fin Stewart

Ste2500/05/2: Siemens Röhrentaschenbuch 1963/64
Anonymous 15 Collector

from Just Qvigstad

Collection of a member from D

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