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RF Measurement
RF Equipment
About
High-power solutions for demanding RF test and system applications
1 kW RF Load Series
Whether convection- or oil-cooled, Bird’s 1000 W loads are built for continuous high-power operation with low VSWR and robust thermal performance. Ideal for transmitter testing, load substitution, and system protection, they’re trusted in lab, field, and industrial environments. Choose from low-maintenance dry models or oil-dielectric designs for enhanced thermal stability.
Explore the 1 kW Series Loads
DC to 2.4 GHz
Convection-Cooled
Loads
1000-T Series
Convection-cooled RF load designed for high-power system testing and protection. Built with durable construction, an integrated handle for easy transport, and optional Quick-Change connectors for flexible field use.
Key Features:
- Portable with built-in handle
- Vertical footprint
- Broad frequency range
- Low maintenance
Ideal for: General-purpose RF testing
DC to 2.4 GHz
Convection-Cooled
Loads
1000-WT Series
Rugged, maintenance-free RF load with passive convection cooling and optional QC connectors. Ideal for high-power, long-duration testing in controlled environments where clean, reliable performance is essential.
Key Features:
- Low profile, wide footprint
- Broad frequency range
- Low maintenance
Ideal for: General-purpose testing when rack height is limited.
DC to 2.4 GHz
Oil-Cooled
Loads
8251 Series
Oil-cooled, self-contained RF load designed for high-power testing up to 1 kW. Provides stable 50-ohm impedance, low reflection, and continuous operation—no external power or cooling required.
Key Features:
- Tight VSWR performance of 1.10 @ 1 GHz
- No blower or electricity required
- Built-in handle for portability
Ideal for: General-purpose RF testing
DC to 28 MHz
Ultra-Stable VSWR
Oil-Cooled Load
8865C13
1 kW load optimized for calibration and process control at 13.56 MHz with exceptional VSWR stability.
Key Features
- VSWR <1.05 typical between DC to 28 MHz
- Less than 0.1 dB VSWR variation during operation
- Eliminate warm-up requirements and minimizes power measurement error
Ideal for: precision RF calibration at 13.56 MHz, test setups demanding minimal VSWR drift, semiconductor fabs, metrology labs and precision RF calibration applications.
Compare Models
Find the right RF load for your application—side-by-side technical specs across Bird’s trusted termination solutions.
Model Number
Frequency Range and VSWR
Connector
Dimensions
Weight
Get Quote/Buy Now
1000-T-FN
request_button
DC to 1 GHz @ 1.15:1 max
1 to 2.4 GHz @ 1.25:1 max
1 to 2.4 GHz @ 1.25:1 max
N (f)
12.3 in x 9.6 in x 12.8 in
(313 mm x 244 mm x 326 mm)
(313 mm x 244 mm x 326 mm)
26.5 lb (12.0 kg)
1000-T-MN
request_button
DC to 1 GHz @ 1.15:1 max
1 to 2.4 GHz @ 1.25:1 max
1 to 2.4 GHz @ 1.25:1 max
N (m)
12.3 in x 9.6 in x 12.8 in
(313 mm x 244 mm x 326 mm)
(313 mm x 244 mm x 326 mm)
26.5 lb (12.0 kg)
1000-T-QFN
request_button
DC to 1 GHz @ 1.15:1 max
1 to 2.4 GHz @ 1.25:1 max
1 to 2.4 GHz @ 1.25:1 max
N (f)
12.3 in x 9.6 in x 12.8 in
(313 mm x 244 mm x 326 mm)
(313 mm x 244 mm x 326 mm)
26.5 lb (12.0 kg)
1000-WT-FN
request_button
DC to 1 GHz @ 1.15:1 max
1 to 2.4 GHz @ 1.25:1 max
1 to 2.4 GHz @ 1.25:1 max
N (f)
18.5 in x 10.6 in x 4.8 in
(470 mm x 270 mm x 122 mm)
(470 mm x 270 mm x 122 mm)
26.5 lb (12.0 kg)
1000-WT-MN
request_button
DC to 1 GHz @ 1.15:1 max
1 to 2.4 GHz @ 1.25:1 max
1 to 2.4 GHz @ 1.25:1 max
N (m)
18.5 in x 10.6 in x 4.8 in
(470 mm x 270 mm x 122 mm)
(470 mm x 270 mm x 122 mm)
26.5 lb (12.0 kg)
8251
request_button
DC to 1 GHz @ 1.1 max
1 GHz to 2 GHz @ 1.25 max
2 GHz to 2.4 @ 1.3 max
1 GHz to 2 GHz @ 1.25 max
2 GHz to 2.4 @ 1.3 max
LC (f)
18 in x 6 in x 8.5 in
(455 mm x 151 mm x 216 mm)
(455 mm x 151 mm x 216 mm)
25 lb, 8 oz (11.5 kg)
8251D
request_button
DC to 1 GHz @ 1.1 max
1 GHz to 2 GHz @ 1.25 max
2 GHz to 2.4 GHz @ 1.3 max (1.065 max, 470 to 860 MHz for "D" Models)
1 GHz to 2 GHz @ 1.25 max
2 GHz to 2.4 GHz @ 1.3 max (1.065 max, 470 to 860 MHz for "D" Models)
1-5/8 EIA, Flanged
18 in x 6 in x 8.5 in
(455 mm x 151 mm x 216 mm)
(455 mm x 151 mm x 216 mm)
25 lb, 8 oz (11.5 kg)
8251D7-16
request_button
DC to 1 GHz @ 1.1 max
1 GHz to 2 GHz @ 1.25 max
2 GHz to 2.4 GHz @ 1.3 max (1.065 max, 470 to 860 MHz for "D" Models)
1 GHz to 2 GHz @ 1.25 max
2 GHz to 2.4 GHz @ 1.3 max (1.065 max, 470 to 860 MHz for "D" Models)
7/16 DIN (f)
18 in x 6 in x 8.5 in
(455 mm x 151 mm x 216 mm)
(455 mm x 151 mm x 216 mm)
25 lb, 8 oz (11.5 kg)
8251D716-300
request_button
DC to 1 GHz @ 1.1 max
1 GHz to 2 GHz @ 1.25 max
2 GHz to 2.4 GHz @ 1.3 max (1.065 max, 470 to 860 MHz for "D" Models)
1 GHz to 2 GHz @ 1.25 max
2 GHz to 2.4 GHz @ 1.3 max (1.065 max, 470 to 860 MHz for "D" Models)
7/16 DIN (f)
18 in x 6 in x 8.5 in
(455 mm x 151 mm x 216 mm)
(455 mm x 151 mm x 216 mm)
25 lb, 8 oz (11.5 kg)
8251N
request_button
DC to 1 GHz @ 1.1 max
1 GHz to 2 GHz @ 1.25 max
2 GHz to 2.4 @ 1.3 max
1 GHz to 2 GHz @ 1.25 max
2 GHz to 2.4 @ 1.3 max
N (f)
18 in x 6 in x 8.5 in
(455 mm x 151 mm x 216 mm)
(455 mm x 151 mm x 216 mm)
25 lb, 8 oz (11.5 kg)
8865SC13
request_button
DC to 28 MHz @ 1.1 max
VSWR less than 1.05:1
VSWR less than 1.05:1
QC Type, LC (f)
19.5 in x 7.5 in x 13.2 in
(496 x 184 x 334 mm)
(496 x 184 x 334 mm)
32 lbs (14.5 kg)
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Why RF Pros Choose Bird Loads
Accuracy, protection, and lasting performance—Bird loads deliver where it counts. From convection to water- and air-cooled designs, each is built to absorb full RF power, minimize VSWR, and perform reliably in the toughest environments.
