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4CX250B

Information - Help 
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
Heater different:
  4CX250F
Successor Tubes 4CX250BC   4CX250R  

Base SPECIAL TUBEBASE in general Other combinations of connections
Filament Vf 6 Volts / If 2.6 Ampere / Indirect / Parallel, (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
Michael Schlör
 
4cx250b_3.jpg
4CX250B: RT
Richard Talbot

 
4cx250b_sock.png
4CX250B: Valvo,Senderöhren, 1983
Anonymous 15 Collector

 
4cx250b_spec_1a.png
4CX250B: Valvo,Senderöhren, 1983
Anonymous 15 Collector


Usage in Models 1= 1962 ; 1= 1965?? ; 2= 1969 ; 1= 1970

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):5



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