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ID = 30951
United States of America (USA)
Brand: Common type USA tube/semicond.
Developer: Raytheon Mfg. Co.; Cambridge, MA 
Tube type:  Screen-grid Tetrode   Text 
Identical to 715C = CV598 = C1111
Similar Tubes
Normally replaceable-slightly different:
  4PR60B ; 5D21 ; C1149
Predecessor Tubes 715B  

Base Medium 4-pin, ceramic disc Top contact with a cap.
Was used by Radar
Filament Vf 26.5 Volts / If 2.1 Ampere / Half indirect

Pulse amplifier tetrode for radar modulators: 15KV, 15A peak. Quad in-line cathode inside a single electrode structure; gold-plated grids, Mo-Zr plate. Heaters designed to operate directly from the aircraft storage battery, between 22 and 28.5 volts.
4-pin base, jumbo-like from a notched ceramic wafer.
Made by Raytheon, RCA, STC, WE.

Dimensions (WHD)
incl. pins / tip
64 x 150 x mm / 2.52 x 5.91 x inch
Information source Tube Lore (I)   
-- Original-techn. papers.   BSTJ

715c.png 715C: Western electric electron tubes
Miguel Angel Trujillo-Rodriguez

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