![]() ![]() Non-DC blocking arrestors are used when DC current needs to pass along the coaxial cable.In general, a DC blocking, inductor-type arrestor is usually preferred for most FM simplex and repeater operations.ĭC Blocking vs.Avoid the use of a gas discharge tube arrestor with a non-DC grounded antenna.The Comet CX-333 tri-band antenna used at the county network radio sites and at many EOCs is NOT DC grounded.Be sure to use an inductor-type arrestor with these antennas. Colinear ground plain antennas are generally NOT DC grounded.Inductor-type arrestors help to bleed static electricity from non-DC grounded antennas.DC blocking arrestors typically share much less surge current with the protected equipment than non-DC blocking arrestors.Instead, shut down the station and get indoors. ![]() This means that temporary field stations generally don't need lighting arrestors.Don't operate your station while there is a chance of lightning nearby.It is important to understand that the recommendations for lightning arrestors apply to any simplex FM station, whether it is used for voice or data communications. A high-level summary is presented here in quick, bulleted form. ![]()
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