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ID = 16704
United States of America (USA)
Developer: General Electric Co. (GE); Bridgeport CT, Syracuse NY 
Tube type:  Thyratron 
Identical to FG17 = PL17 = 1701_Amperex = NL-715 = TT-17_Taylor = MT17 = CE-309 = ST17 = CV2957 = XG5-500 = 967 = E5000/05 = 867_Sylvania = 5557
Similar Tubes
Normally replaceable-slightly different:
  38217 ; Ste2500/05/2
Multiple differences or of other kind:

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 the absence of grid excitation. It is listed on page 48 of "The Story of Electronic Development at the General Electric Company" Dated Dec 10th, 1930. Early versions of the GE tube had a nickel plated UX base with porcelain insulation. Later tubes (1945) have Bakelite bases. Also made in Italy by Fivre.

Weight 90 g / 3.17 oz
Information source Tube Lore (II)   p. 80 & 211
- - Manufacturers Literature   Data sheet ETI118 April 1945
Taschenbuch zum Röhren-Codex 1948/49

3l11.png FG17: Manufacturer's Literature
Emilio Ciardiello

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Just Qvigstad
FG17: Manufacturer's Literature
Emilio Ciardiello

Usage in Models 1= 1945?

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

Collection of



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