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ID = 55375
Tube type:  Transmitting Tetrode, air cooled   VHF 
Identical to 4-400C = PL-6775 = 6775
Similar Tubes
Other shape (e.g. bulb type):
  4-400A ; 4-400B

Base SPECIAL TUBEBASE in general Top contact with a cap.
Filament Vf 5 Volts / If 14.5 Ampere / Direct

4-400C, also known as JEDEC 6775, is a ruggedized long-life version of 4-400A/8438, with smaller plate structure, lower filament temperature and one-piece plate cap.

Dimensions (WHD)
incl. pins / tip
84 x 145 x mm / 3.31 x 5.71 x inch
Weight 236 g / 8.32 oz
Information source -- Collector info (Sammler)   
Tube Lore (I)   
4-400C: KG
Kevin Gregson

4-400C: Fin Stewart
Fin Stewart


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