Antique radios, Old Time Radios
4CX250B
| Country: |
Worldwide |
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Brand: |
Common type Worldwide |
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Tube type: |
Transmitting Tetrode, air cooled beam power UHF |
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Tube ID = 18711 |
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| Identical to |
4CX250B = QEL2/275 = 7203 = QV2-250C
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| Similar
Tubes |
Other class quality (otherwise equal):
4CX250BC; 4CX250R
Heater different:
4CX250F
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| Successor Tubes |
4CX250BC
4CX250R
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| Base |
OTHER TUBEBASE in general
Other combinations of connections
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| 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.
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| Weight |
113 g / 3.99 oz |
| Tube prices |
0 Tube prices (visible for members
only)
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4CX250B: ARRL Handbook 1972
Michael Schlör
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4CX250B: MS
Martin Steyer
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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 ; 2= 1969 ; 1= 1970 |
| Number of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe): 4 |
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