Bird Technologies DA40 UHF Series-Manual - Manual (Page 16)

Bird Technologies
2
Bird Digital Air Load Resistors are air cooled and capable of dissipat-
ing RF line power up to 40 kW (depending on the model). Virtually
maintenance free and simple to operate, this unit should provide years
of trouble free operation.
Description
The unit is supported by four bumper feet. The RF input connector is
located on the top of the unit. Fans on all four sides allow for forced air cool-
ing of the resistors. The transmitter interlock is located on the front panel.
The model number is printed on a label on the lower left of the unit.
The unit is not intended for exposed outdoor use, or in areas of condens-
ing humidity. Ensure adequate space is available for air circulation.
The Digital Air Load Resistors are offered in a variety of forms differing
in their power ratings, ac input power requirements, frequency ranges,
and connector types (see Figure 2 on page 3 for model numbers).
Example - A Model DA10F15 is a UHF 10 kW load with a 3-
1/8” flanged connector that requires a 115 V 50/60 Hz power
source.