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4-250A

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ID = 21346
       
Country:
United States of America (USA)
Brand:
Tube type:  Transmitting Tetrode, air cooled   VHF 
Identical to 4-250A = QB3,5/750GA = 5D22 = PL-5D22
Similar Tubes
Normally replaceable-slightly different:
  6156
First Source (s)
15.Nov.1948 : - - Manufacturers Literature

Base Giant 5 pin metal shield (B5E) Top contact with a cap.
Was used by Transmittertube (Radio)
Filament Vf 5 Volts / If 14.5 Ampere / Direct / Specified voltage AC/DC
Dimensions (WHD)
incl. pins / tip
90 x 156 x mm / 3.54 x 6.14 x inch
Weight 185 g / 6.53 oz
Tube prices 2 Tube prices (visible for members only)
Information source Tube Lore (II)   p. 203
Universal Vade-Mecum, Electron Valves and Semiconductor Devices   Section 456, p. 996
Babani, International Radio Tube Encyclopaedia
Taschenbuch zum Röhren-Codex 1948/49

4250_use1.png
4-250A: ARRL The Radio Amateur's Handbook 1950
Götz Linss † 27.06.21

4250a_sock.png 4-250A: Tabu Röhren-Codex, 1948
Anonymous 15 Collector

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Just Qvigstad
4250a_spec_1a.png
4-250A: Valvo,Senderöhren, 1983
Anonymous 15 Collector

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Usage in Models 1= 1950 ; 1= 1954?? ; 1= 1956 ; 1= 1965?

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):4

Collection of

 
4250a.jpg

4-250A
 

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