50 kW, Forced-Air Cooled Moduload™ RF Terminations
8650B Series, RF Loads are compact high-power 50-ohm terminations efficiently dissipate up to 50 kW of RF over a wide frequency range up to 900 MHz.
- 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.
- Compact, low-profile design saves space in crowded transmitter sites.
- Available Voltage Options (add suffix to model number)
- 115V @ 60 Hz (-115)
- 230V @ 50 Hz (-230)
- 230V @ 60 Hz (-230-6)
Model Selections
| Model |
Connector |
| 8655B |
3-1/8" EIA, Flanged |
| 8656B |
3-1/8" EIA, Unflanged (Flush) |
8640A930-1, Load Protection Switch provides an added layer of safety for the water-cooled Moduloads by preventing RF power from reaching it before proper coolant flow has been established. This device protects the Moduloads from damage that can result in costly downtime. Only Available for 8655B, 3-1/8" Flanged Units
Item Name
50 kW, Forced-Air Cooled Terminations
Power Rating
50 kW continuous
Frequency Range and VSWR
1 kHz to 900 MHz @ 1.10 max (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
Dimensions
50.5 in x 19.2 in x 19.6 in (L x W x D) (659 mm x 487 mm x 497 mm)
Power
115 V models: 14 A nominal @ 115V ± 10% 60Hz
230 V models: 7 A nominal @ 230V ± 10% 50Hz