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4CX250B

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ID = 18711
       
Country:
Worldwide
Brand: Common type Worldwide tube/semicond.
Tube type:  Transmitting Tetrode, air cooled   beam power   UHF 
Identical to 4CX250B = QEL2/275 = 7203 = QV2-250C = FU-251F = CV6137
Similar Tubes
Other class quality (otherwise equal):
  4CX250BC ; 4CX250R
Different maximum ratings:
  Y-867
Heater different:
  4CX250F
Other base:
  Y-799
Successor Tubes 4CX250BC   4CX250R  
Base SPECIAL TUBEBASE in general Other combinations of connections.
Filament Vf 6 Volts / If 2.6 Ampere / Indirect / Specified voltage AC/DC
Description This is also the Mullard QV2-250C. Also manufactured by MO Valve Company GB.
Metal Ceramic Construction. Forced air cooling for full power output to 500MHz.
At frequencies above 400MHz, the heater voltage should be reduced to 5.5V.
Pa <250W, Va<2kV. Typ Va=500, Vg2=250, Ia=0.2, gm=12mA/V. 
Weight 113 g / 3.99 oz
Tube prices 4 Tube prices (visible for members only)
4cx250b_usch.png
4CX250B: ARRL Handbook 1972
Anonymous 10 Collector
4cx250b_sock.png 4CX250B: Valvo,Senderöhren, 1983
Anonymous 15 Collector
More ...
 4cx250b_spec_1a.png
4CX250B: Valvo,Senderöhren, 1983
Anonymous 15 Collector
More ...
Usage in Models 1= 1962 ; 1= 1965?? ; 2= 1969 ; 1= 1970?? ; 1= 1970 ; 1= 1971?? ; 1= 1978?? ; 1= 1979? ; 2= 1980?? ; 1= 1981??
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):12
Literature "75 Jahre Sendertechnik bei AEG-Telefunken"

Collection of

Danko Tkalec (HR)
Tomasz Szczesniak (PL)
Alois Wolf (D)
Otto Frosinn (D)
Peter Pfeiffer (D)
Georges Werts (B)
Siegfried Droese (D)
Götz Linss † 27.06.21 (D)
Pedro Prieto-Castro (E)
Wesselin Tzenow † 25.5.10 (D)
Oskar Elm (D)
Bruce Morgenstern (CDN)
Martin Steyer (D)
Richard Talbot (D)
Carlo La Perna (I)
Stig Comstedt (S)
Emilio Ciardiello (I)
 
4cx250b_3.jpg

4CX250B
 
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