Manual

1
Chapter 1 Introduction
Bird 8930 Series Semiconductor Loads are general purpose, 50 ohm,
coaxial RF transmission line terminations, useful as standby reject
loads. They provide accurate, dependable, and low reflection line
terminations over a frequency range of dc – 28 MHz, specially
calibrated for greater stability at 13.56 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
pair of vent plugs at the top of the unit relieve 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 Two (2) Shipping Plugs
y Two (2) Vent Plugs
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 generator to
prevent overheating of the load