Datasheet > 4CX250B-M

4CX250B-M

更新时间： 2022-09-19 12:26:50

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RADIAL BEAM POWER TETRODE

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4CX250B-M 数据手册

RADIAL BEAM POWER TETRODE

4CX250B/M

7203A

ChARACTERISTICS¹

ELECTRICAL

Cathode: Oxide coated, Unipotential

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.

Filament Voltage

6.0 0.3

2.6

Current at 6.0 Volts

Direct Interelectrode Capacitances (grounded cathode)²

Cin

Cout

Cgp

15.7 pF

4.5 pF

0.04 pF

Ampliﬁcation Factor, Average (screen-grid)

Frequency of Maximum Ratings (CW)

500 MHz

MECHANICAL:

Overall Dimensions:

Length

Diameter

2.46 in; 62.5 mm

1.64 in; 41.7 mm

4 oz; 113 gm

Any

Weight (approx.)

Operating Postition

Maximum Operating Temperature:

Ceramic/Metal Seals & Envelope

Anode Core

250° C

Cooling

Forced Air

Base

Special, 9-pin Jedec-B8-236

Recommended Air System Socket

Recommended Air Chimney

SK-600 Series

SK-606

¹Characteristics 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.

²Capacitance 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

Min.

Nom.

Max.

Filament Current @ 6.0 Volts

Catꢀode Warm-up Time

2.3

2.9

Amperes

Seconds

Interelectrode Capacitance ¹(grounded catꢀode circuit)

Cin

14.2

4.0

17.2

5.0

0.06

Cout

Cgp

Interelectrode Capacitance ¹(grounded grid circuit)

Cin

4.0

13.0

0.01

5.0

Cout

Cpk

¹Capacitance values are for a cold tube as measured in a sꢀielded ﬁxture in accordance witꢀ 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.

For information on this and other CPI products, visit our website at: www.cpii.com,

or contact: CPI MPP, Eimac Operation, 607 Hansen Way, Palo Alto, CA 94303

telephone: 1(800) 414-8823. fax: (650) 592-9988 | email: powergrid@cpii.com

July 2011

12 3 4 5 6 7

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