Bird - The RF Experts
8750 Series

30 kW, Water-Cooled RF Terminations

8750 Series, RF Loads are designed as a compact, low VSWR and non-radiating termination for high-power transmitter/transmission line systems. It generates almost no ambient heat, making installation space minimal and convenient, in any position. The RF power is converted to heat in the hollow resistive film load resistor and directly absorbed by the water flowing through it.

  • Broadband water-cooled loads for long-term RF dissipation when heat must be efficiently transferred away from the area
  • Small size may be carried easily, used in any position and installed anywhere there is a source of potable water
  • 3-1/8" EIA Flanged and flangeless connectors allow termination of full 20 kW up to 900 MHz
  • Requires flow rate of up to 9 gallons (34.2 liters) per minute
Model Selections
Model Connector
8755 3 1/8 in EIA, Flanged
8756 3 1/8 in EIA, Unflanged (Flush)
product specifications:
Item No
8750 Series
Item Name
30 kW, Water-Cooled Terminations
Power Rating
30 kW continuous
Frequency Range and VSWR
1 kHz to 900 MHz @ 1.10 max (DC for continuity checks)
Potable Water
Water Temperture Range
+5 to +60°C
Water Flow Rate
7 gal./minute @ 5 °C to 9 gpm at 60 °C
(26.6 liters/minute @ 5 °C to 34.2 lpm at 60 °C)
Product Type
Operating Position
1/2 in FPT or 3/4 in hose
See Model Matrix
Input Flange Diameter
5-3/16 in Dia. (132 mm)
Black Powder Coat
19.5 in L x 3.5 in dia (495 mm x 90 mm)
15 lb 13 oz (7.2 kg)
accessories - Model 8755:
3-1/8" EIA Connector Coupling Kit
Wall Mount Bracket
accessories - Model 8756:
3-1/8" UnFlanged Connector-Flush Coupling Kit
Wall Mount Bracket