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Author Topic: Portable Air Compressor RFI on all HF Bands  (Read 2678 times)
W2MV
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Posts: 207




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« on: May 23, 2012, 11:11:01 AM »

A few days ago I was suddenly experiencing new, strong, buzzing RFI on all HF bands. OK, what the hell is this now? Band conditions were good too. It would randomly go on and off for seconds or minutes at a time. The NB in my IC-7600 would get rid of it at it's maximum settings, but then of course I would have to deal with the associated distortion.

After I went off the air (easy to do under the circumstances), I went outside and heard a new sound: obviously a neighbor's air compressor going on and off. That was the culprit. If it happens again I'll offer to install a #77 material toroid on his power cord which will likely help.
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KC9NVP
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Posts: 82




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« Reply #1 on: May 24, 2012, 10:55:03 AM »

I would suspect the motor to have brushes which is common for universal type AC/DC motors found around the house from cake mixer to hand drill.  You may want to check with your neighbor and see if there is a need to run it all the time, they may not be aware of the interference it is causing.  Of course you want to work with them in fixing this problem so you can enjoy your hobby.  My compressor only runs when I am in the garage working on something, so it is shut down most of the time, so I do not see a reason to keep one running 24/7 in a home.

73 and good luck,

David
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W2MV
Member

Posts: 207




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« Reply #2 on: May 24, 2012, 11:02:53 AM »

David,

He only ran it only for a few hours (I would guess for a project.) It has been off ever since which is a good thing.

The war against RFI continues!

Alan
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