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ID = 18711
Brand: Common type Worldwide tube/semicond.
Tube type:  Transmitting Tetrode, air cooled   beam power   UHF 
Identical to 4CX250B = QEL2/275 = 7203 = QV2-250C = CV6137 = FU-251F
Similar Tubes
Other class quality (otherwise equal):
  4CX250BC ; 4CX250R
Different maximum ratings:
Heater different:
Other base:
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: ARRL Handbook 1972
Anonymous 10 Collector

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

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4CX250B: Valvo,Senderöhren, 1983
Anonymous 15 Collector

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

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

Collection of



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