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Old 17-04-2018, 11:30   #1
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Radar interference with electronics concern

I am thinking about installing a 40W radar in a mid-sized boat and wondering about the potential for interference.

I assume the radar will be blasting EM radiation into the pilothouse where there are all kinds of electronic and radio gear. Have people here experienced radar-generated interference in their cabin electronics?
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Old 17-04-2018, 11:55   #2
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Re: Radar interference with electronics concern

Unless you're going to mount the radar at eye level, there should be no electronic interference or health danger. I've used marine radar my whole adult life on boats and ships and never had problems and I'm 70. On really old stuff, sometimes radios would hum as the radar aligned with the radio antenna during its sweep.
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Old 17-04-2018, 12:17   #3
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Re: Radar interference with electronics concern

The radar is not a concern. Most of the current goes to heat the magnetron and in reality you only have 1 to 2 amps @ 12V emitted in the X-band which is insignificant.

The SSB on the other hand is easily 10x the power. On my boat, operating the SSB sometimes shuts down the inverter - go figure.
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Old 18-04-2018, 18:48   #4
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Re: Radar interference with electronics concern

"Unless you're going to mount the radar at eye level, "

A clueless boat owner who doesn't read the installation manual can still put the radar too low, and irradiate crew standing on the bow. Depending on the radar, the beam may have a vertical spread of 20-40 degrees and that "cone" should be clear above anyone standing on deck, and clear below any antennas that are aloft (like the VHF).

Usually not a problem but perhaps a professional installation might be more reassuring.
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