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鸟牌Bird|2500W假负载8890-300 2.5 kW, Oil-Cooled Terminations Termaline® Series RF Coaxial Terminations The 8890-300 2.5 kW, TERMALINE® Load Resistor Series are self-contained high-power 50 ohm coaxial transmission line terminations requiring no outside power source or additional equipment. It provides accurate, dependable, and practically nonreflective termination for testing and adjusting transmitters under nonradiating conditions. The load consists essentially of a cylindrical film type resistor immersed in a dielectric coolant. The resistor, individually selected for its accuracy, is enclosed in a special tapered housing which provides a linear reduction in surge impedance directly proportional to the distance along the resistor. Oil-assisted (vented) convection cooling for safe, continuous operation up to 2500W full rated power
· Compatible with all Bird QC connectors
· Overload thermoswitch P/N 8890-008 is optional. Free assembly when ordered as a package.
8890-300 Series, Terminations
Model
Connector
Recess (In.)
Diminsions, L x W x H
Weight
8890-300
LC, Female
n/a
23-1/8" x 7" x 17-3/16" (587 x 178 x 437 mm)
57 lbs. (26 kg)
8891-300
3-1/8" EIA, Flanged
0.922
25-1/8" x 7" x 17-3/16" (638 x 178 x 437 mm)
59 lbs. (27 kg)
8891D-300
8892-300
1-5/8" EIA, Flanged
0.625
58 lbs. (26 kg)
8892D300
8895-300
1-5/8" EIA, Unflanged
0.438
22-3/16" x 7" x 17-3/16" (564 x 178 x 437 mm)
Power Rating (Watts)
2500 continuous
Frequency Range and VSWR
DC - 1 GHz @ 1.1 max. 1 GHz - 2 GHz @ 1.25 max. 2 GHz - 2.4 GHz @ 1.3 max.
Impedance (Ω)
50
Operating Temperature (°C)
-40°C to +45°C
Coolant
2.9 gal. (11 liters) Silicone oil
Product Type
Oil-Cooled
Operating Position
Horizontal only
Connector(s)
See Chart
Finish
Gray Powder Coat
Nominal Size [inches (mm)]
See chart
Weight [lbs (kg)]
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