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1B42

Information - Help 
ID = 39709
       
Country:
United States of America (USA)
Brand: Common type USA tube/semicond.
Developer: Bell Labs; Murray Hill, NJ. 
Tube type:  MICROWAVE AND RADAR, general 
Identical to 1B42 = D-170135
First Source (s)
15.Dec.1947 : Tube Lore (I)

Was used by Radar
Filament
Description

Series spark gap intended for high-power radar modulator circuits. Cathode is formed by mercury immobilized by a cup-shaped iron sponge, anode is a 0.06" diameter molybdenum rod.

Mercury evaporates due to the sparks, then condenses and returns into the iron sponge, so to always have fresh mercury film over the cathode surface. Hydrogen filling to minimize the jitter

80 to 300 A pulses, 5 kV breakdown voltage.

Introduced by WE during WWII as D-170135. RMA registration in 1947. Also manufactured by Machlett.

 
Dimensions (WHD)
incl. pins / tip
76 x 152 x mm / 2.99 x 5.98 x inch
Information source Tube Lore (I)   
-- Original-techn. papers.   Glasoe & Lebaqz, Pulse Generators
  1b42_appa.png
  1B42: Manufacturer's Literature
Emilio Ciardiello
 
1b42mach_2.jpg
1B42: Private collection
Emilio Ciardiello

 


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