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ID = 16637
United States of America (USA)
Brand: Common type USA tube/semicond.
Tube type:  Thyratron 
Identical to 4C35 = FX225 = XH8-100 = CV1787 = PL435
Similar Tubes
Normally replaceable-slightly different:
Successor Tubes 6268  

Base Jumbo 4-pin bayonet Top contact with a cap.
Was used by Radar
Filament Vf 6.3 Volts / If 6 Ampere / Indirect / Parallel, (AC/DC)

Hydrogen Thyratron for radar modulation applications.
Jumbo 4pin base with bayonet.

  • 8 kV max anode voltage
  • 90 A peak cathode current
  • 350 kW peak pulse power into the load
  • 150 V min. triggering grid voltage.

Early designated as FX225

Tube prices 2 Tube prices (visible for members only)
Information source Taschenbuch zum Röhren-Codex 1948/49   
-- Original-techn. papers.   
Emilio Ciardiello

4C35: Miniwatt Handbuch
Peter Hoddow

4C35: Mullard-original papers
Dietrich Grötzer

from Just Qvigstad

Usage in Models 1= 1949

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):1

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