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Constant whine noise?

I had the same situation here at my house. It was the power companies transformers and corona discharge around an insulator. Called them up and told them it was making receiving communications on my ham radio impossible. The noise level was S-9 all the time.(AM) They had the noise floor to acceptable levels (Less than S-1) in a couple of days.
The FCC rides hard on power companies that trash up the air waves.
 
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I don't think that matters. The transformer is still above ground, and even if it isn't the interference can be conducted in to your house and still be radiated in to the air waves.
 
Limeybastard said:
Getting a constant alternator type whine noise on all AM channels on base station setup. Tried two different PSU unit's, same thing. Occasionally the whine gradually fades away, with fades away I mean it starts slowly and gradually getting quieter until it's hardly noticable.

I've done a video so that you can hear it. Funnily enough on one frequency in the video the noise is not present.

Antenna is a Wilson 1000 magmount, coax is 100ft in lenght swr is all below 1.5

Click to expand...


Some things that have caused a similar noise for me on the base are, a small refrigerator, a house fan, a small fan for my amp, a tv, an electric heater, florescent lights, phone charger, battery charger.
 
Sonar said:
Do you live in close proximity to others. It's possible a neighbor has gotten a new toy. Maybe a plasma television or replaced an old Appliance with a new one. Maybe the replacement is causing you interference as where the old one did not. That would be the worst case scenario. That would really suck!
Click to expand...

Fairly spread out by modern standards, each neighbor is approx 30 feet or more away from either side of my home. No, one behind me.

Im gonna have to write down the ocurances, there might be a set time or pattern when this occurs.
 
Some more vids of the noise in question. The sound has some behavior, it speeds up and slows down like a motor noise of some sort. Just now it slowed down as it got slower and slower it disappeared audibly.



Slows down and goes....





 
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if you happen to have a hand held radio you can walk around your house and othyers and see if you get it on the hand held. at my buddys shop he had a noise that would come and go. we walked around with it and found a transformer on the pole about 50 foot away from his shop. we could hit the post with a sledge hammer and the noise would go away for a while. the power company changed it out and all was good. that was about 10 years ago.

I have a uniden 880 that when I have a certain TV on it will peg out the meter with a loud noise. it only does it to the 880 radio. my cobras and uniden do not do it. they are all the older radios. when I pull into the drive about 70 feet from my parking spot at home it does the loud noise.
 
sonoma said:
if you happen to have a hand held radio you can walk around your house and othyers and see if you get it on the hand held. at my buddys shop he had a noise that would come and go. we walked around with it and found a transformer on the pole about 50 foot away from his shop. we could hit the post with a sledge hammer and the noise would go away for a while. the power company changed it out and all was good. that was about 10 years ago.

I have a uniden 880 that when I have a certain TV on it will peg out the meter with a loud noise. it only does it to the 880 radio. my cobras and uniden do not do it. they are all the older radios. when I pull into the drive about 70 feet from my parking spot at home it does the loud noise.
Click to expand...

Hand held cb radio? Or AM radio receiver? cheers. I was looking at buying a AM radio receiver with 27Mhz reception, but cant find any.
 
Try a little pocket AM radio when the noise is present on your rig. Tune it in between stations - a reasonably strong broadcast station may well block a low powered interfering signal.

Google >shortwave listening radio< and take a look. I have an old Sony pocket-size radio that I bought in Japan back in the 1960s and it's still dynamite! AM/FM and half a dozen shortwave bands.
 
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Beetle said:
Try a little pocket AM radio when the noise is present on your rig. Tune it in between stations - a reasonably strong broadcast station may well block a low powered interfering signal.

Google >shortwave listening radio< and take a look. I have an old Sony pocket-size radio that I bought in Japan back in the 1960s and it's still dynamite! AM/FM and half a dozen shortwave bands.
Click to expand...

Would one of those eastern block Selena radioa work?
 
Limeybastard said:
Getting a constant alternator type whine noise on all AM channels on base station setup. Tried two different PSU unit's, same thing. Occasionally the whine gradually fades away, with fades away I mean it starts slowly and gradually getting quieter until it's hardly noticable.

I've done a video so that you can hear it. Funnily enough on one frequency in the video the noise is not present.

Antenna is a Wilson 1000 magmount, coax is 100ft in lenght swr is all below 1.5

Click to expand...



Buy a good power supply.

Buy the correct antenna for your home setup.

100ft coaxial??

Install the correct setup before blame the radio.
 
Mag mount and 100ft of coax ! real good chance your picking up something in your own home.
Coax is most likely hot and acting as a pickup for the noise. (that pesky CMC again)
Moving your mag mount or rerouting the coax would be worth a try. Fit a ground wire and or radials , does the noise change?

Either way you need to locate the source first. Like some one said earlier power the radio with a battery and turn off the house power and see if it goes away.
 
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