Bird - The RF Experts
8890-300 Series
8890-300 Series, 2.5 kW, Oil-Cooled Terminations
8890-300 Series

8890-300 Series, 2.5 kW, Oil-Cooled Terminations 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 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)
8892-300 1-5/8" EIA, Flanged 0.625 23-1/8" x 7" x 17-3/16"
(587 x 178 x 437 mm)
58 lbs. (26 kg)
8892D300 1-5/8" EIA, Flanged 0.625 23-1/8" x 7" x 17-3/16"
(587 x 178 x 437 mm)
58 lbs. (26 kg)
8895-300 1-5/8" EIA, Unflanged 0.438 22-3/16" x 7" x 17-3/16"
(564 x 178 x 437 mm)
58 lbs. (26 kg)

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8890-300 Series, 2.5 kW, Oil-Cooled Terminations
8890-300 Series
product specifications:
Item No
8890-300 Series
Item Name
2.5 kW, Oil-Cooled Terminations
Power Rating
2500 W 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
Coolant
2.9 gal. (11 liters) Silicone Oil
Product Type
Oil-Cooled
Operating Position
Horizontal Only
Connectors
See Model Matrix
Finish
Gray Powder Coat
Dimensions
See Model Matrix
Weight
See Model Matrix
compatible devices:
8890-315 [320] Series
5 kW, Oil-Cooled Terminations with 115 VAC or 230 VAC Blower Assy.