The Eimac 4CX250B/M is a ceramic/metal,
forced-air cooled external-anode tetrode with a
maximum anode dissipation rating of 250 Watts.
The 4CX250B/M is intended for use in applica-
tions where tight control of electrical specifica-
tions is required and replaces the 4CX250B in
all applications. This tube utilizes a ruggedized
internal structure and utilizes a welded anode cap
for improved reliability.
RADIAL BEAM POWER TETRODE
RADIAL BEAM POWER TETRODE 4CX250B/M / 7203A
Cathode: Oxide coated, Unipotential
Current at 6.0 Volts
6.0± 0.3 V
Direct Interelectrode Capacitances (grounded cathode)
Amplification Factor, Average (screen-grid)
Frequency of Maximum Ratings (CW)
2.46 in; 62.5 mm
1.64 in; 41.7 mm
4 oz; 113 gm
Maximum Operating Temperature:
Ceramic/Metal Seals & Envelope
Special, 9-pin Jedec-B8-236
Recommended Air System Socket
Recommended Air Chimney
Characteristics and operating values are based upon performance tests. These figures may change without notice as the result of additional data or product refinement.
CPI MPP, Eimac Operation should be consulted before using this information for final equipment design.
Capacitance values are for a cold tube as measured in a special shielded fixture in accordance with Electronic Industries Association Standard RS-191.
RANGE VALUES FOR EQUIPMENT DESIGN
Filament Current @ 6.0 Volts
Cathode Warm-up Time
(grounded cathode circuit)
(grounded grid circuit)
Capacitance values are for a cold tube as measured in a shielded fixture in accordance with Electronic Industries Assocation Standard RS-191.
The values listed above represent specified limits for the product and are subject to change. The data should be used for basic
information only. Formal, controlled specifications may be obtained from CPI for use in equipment design.
on this and other CPI products, visit our website at:
or contact: CPI MPP, Eimac Operation, 607 Hansen Way, Palo Alto, CA 94303
(650) 592-9988 |
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