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8650B Series
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8650B Series

8650B Series, 50 kW, Forced-Air Cooled Terminations are available in models to work with 115 or 230 volts at 50 or 60 Hz. These compact high-power 50-ohm terminations efficiently dissipate up to 50 kW of RF over a wide frequency range up to 900 MHz. The RF input connector is located in the center of the side of the rectangular unit.

  • Forced-air heat exchanger cooled load for high-power applications up to 900 MHz
  • Compact, low-profile design saves space in crowded transmitter sites
  • Interlock control circuit provides fail-safe protection of the transmitter and load resistor in the event of an ac power failure to the blower or coolant pump
8650B Series, Terminations
Model Connector
8655B 3-1/8" EIA, Flanged
8656B 3-1/8" EIA, Unflanged (Flush)

Power Add Suffix to Model
115 V 60 Hz -115-6
230 V 50 Hz -230-5
230 V 60 Hz -230-6
product specifications:
Item No
8650B Series
Item Name
50 kW, Forced-Air Cooled Terminations
Power Rating
50 kW continuous
Frequency Range and VSWR
1.1 max. 1 kHz - 900 MHz (DC for continuity checks)
Temperture Range
Per Power Level and Coolant Mix:
>=40 kW: (100% Water) +5 to +30 °C; <40 kW: (100% Water) +5 to +45 °C
>=40 kW: (35% Ethylene Glycol/65% Water) -20 to +25 °C
<40 kW: (35% Ethylene Glycol/65% Water) -20 to +35 °C
Coolant
17 qts. (16.1 liters) 100% water
or 65% water/35% industrial Ethylene Glycol. With forced-air cooling
Product Type
Forced-Air Cooled
Operating Position
Horizontal Only
Connectors
See Model Matrix
Finish
Gray Powder Coat
Dimensions
50-1/2" x 19-5/32" x 19-9/16" (L x W x D)
659 x 487 x 497 mm
Weight
275 lbs. (125 kg)
Power
115 V models: 14 A nominal @ 115V ± 10% 60Hz
230 V models: 7 A nominal @ 230V ± 10% 50Hz
accessories:
5-1134-3
Ethylene Glycol, Industrial Grade