8890-300 Series – 2500W, Oil-Cooled Dry RF Terminations
2500W, Oil-Cooled Dry RF Terminations
8890-300 Series, RF Loads 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 non-reflective termination for testing and adjusting transmitters under non-radiating 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.
Features
- 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.
Model Selections
| Model | Connector | Dimensions, L x W x H | Weight |
|---|---|---|---|
| 8890-300 | QC-LC(F) | 25.2 in x 7.5 in x 17.25 in (638 mm x 190 mm x 437 mm) |
59 lbs. (27 kg) |
| 8891-300 | 3 1/8 in EIA, Flanged | 25.2 in x 7.5 in x 17.25 in (638 mm x 190 mm x 437 mm) |
59 lbs. (27 kg) |
| 8891D300 | Digital, 3 1/8 in EIA, Flanged | 25.2 in x 7.5 in x 17.25 in (638 mm x 190 mm x 437 mm) |
59 lbs. (27 kg) |
| 8892-300 | 1 5/8 in EIA, Flanged | 25.2 in x 7.5 in x 17.25 in (638 mm x 190 mm x 437 mm) |
59 lbs. (27 kg) |
| 8892D300 | Digital, 1 5/8 in EIA, Flanged | 25.2 in x 7.5 in x 17.25 in (638 mm x 190 mm x 437 mm) |
59 lbs. (27 kg) |
| 8895-300 | 1 5/8 in EIA, Unflanged | 25.2 in x 7.5 in x 17.25 in (638 mm x 190 mm x 437 mm) |
59 lbs. (27 kg) |
| Product | Description |
|---|---|
| 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 |
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