D-8 888-2629-200 10/6/10
WARNING: Disconnect primary power prior to servicing.
Maxiva ULX COFDM Series
The surge protectors must be selected for the line to ground voltage and the maximum
energy to be diverted. Bigger is always better in this case. There are several
manufacturers of surge protectors:
• Lightning Elimination Associates., Inc.
• Current Technology
• Control Concept
• MCG Electronics, Inc.
•EFI Corp.
• General Electric
All of these vendors provide parts and systems to protect broadcast transmitters.
All audio and control lines should be protected the same as described for ac lines with
components sized accordingly.
All coaxial lines should have the shield connected to the system ground at the point of
entrance and in addition have a ferrite choke around it located between the entrance
point and the equipment rack. This will provide a high impedance for current flowing in
the shield but does not affect the signal currents.
D.5 Conclusion
The 1% chance of a major lightning strike probably can not be protected against but the
other 99% can be controlled and damage prevented. Install surge protection on all
incoming and outgoing lines at the wall of the building connected to a well designed
ground system. Properly install the antenna ground system with spark gap adjusted
correctly and maintained. With this done you can sleep peacefully at night if your bed
isn’t under the feed line.
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