Bird Technologies 8930 Series - Manual (Page 11)

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Chapter 1 Introduction
Bird 8930 Series Loads are general purpose, 50 ohm, coaxial RF
transmission line terminations, useful as standby reject loads for
single or double sideband transmitters. They provide accurate,
dependable, and low reflection line terminations over a frequency
range of dc – 1000 MHz. Up to 10,000 watts can be dissipated.
The loads have a coolant chamber surrounded by radiator fins. The
front and rear fins form mounting flanges which can be used as
supports for freestanding use or as brackets for fixed mounting. A
vent plug at the top of the unit relieves internal pressure from coolant
expansion. A blower with three axial fans is on the bottom of the load.
The load’s simple and rugged design minimizes maintenance
requirements.
Items Supplied
y Load Resistor: Pre-filled with coolant at the factory
y Detachable 3-wire power cable (without male plug for 230 Vac
power cable)
y One Shipping Plug
y One Vent Plug
y Instruction Manual
Items Required but
not Supplied
y Coupling Kit: Connects the load to the RF line
y Male plug for the power cable (230 Vac only)
Optional
Accessories
y Interlock Thermoswitch: Automatically shuts off the transmitter
to prevent overheating of the load