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 Noisey reception- or get a bigger hammer.

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FrankB
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Join date : 2010-11-22

PostSubject: Noisey reception- or get a bigger hammer.   2012-02-21, 12:31 am

I ran across this tip in an old radio magazine & thought it was well worth passing on.
A Ham had problems with noise on his receiver.
Nothing worked. He shut off all the circuits in his home one by one, even talked to his neighbors and was given permission to shut off their power to see if it was being generated in their home. (Geez- whsh folks were so cooperative nowdays).

He even talked to the power company troubleshooter, and he suggested the following:
Take a portable radio tuned to the freq the noise was on and go around to every power pole.
Whack the pole with a sledge hammer and see if it increased or decreased the noise.

About a block away he hit a pole and the noise changed drastically. He then called the power company, and they came out and located & replaced a defective insulator.

Problem solved with the use of a big hammer. Razz

I had a similar problem here, with mass noise coming in from the power line. I contacted the local power company and the line tech called me back. When he found out I was a Ham, and not some nut case, he paid careful attention to what I told him & what I had tried.

I had whacked on poles all down my street and the entire area, with no change. I definately determined the noise was coming in on the power line.

About 2 weeks later the noise was gone. Another week went by and the tech called me. He asked if the noise was gone and I said "Yes Thank You". HE said they found a bad ground in the distribution system on a pole about 1/2 mile away, clear across the freeway. Problem solved, noisey reception gone, and another happy customer made.
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Cliff Jones
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PostSubject: Re: Noisey reception- or get a bigger hammer.   2012-03-28, 9:59 pm

Good to know that everything has a cause and effect. Good information to remember when needed.

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I'm a Science Thinker, Radio Tinkerer, and all around good guy. Just ask Me!
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FrankB
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PostSubject: Re: Noisey reception- or get a bigger hammer.   2012-08-31, 11:12 pm

Another way to get rid of noise:
I suggested this to a Ham friend, John who lived in downtown Tacoma in the industrial area.
He had nasty noise on all bands. Crying or Very sad

I suggested taking a piece of plastic pipe and putting it around his ground rod, digging down about 4' or deeper. then filling the pipe with copper sulphate and watering it good. Keeping the copper silphate wet. Salt can also be used, but will cause corrosion.

This greatly reduced the noise level to tolerable, but I was not real happy with the noise level.

I then remembered an old article I had read in a 20's radio book about building a "tuned ground", Basically just a LC antenna tuner in the ground lead.

Viola! about 90% of the noise or better gone with this.
He was very happy about the results. Very Happy
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oldaudio



Join date : 2013-01-30

PostSubject: Re: Noisey reception- or get a bigger hammer.   2013-01-30, 11:23 am

Frank: Wish I known that 10 years ago. I worked for the ICRR comm dept in Memphis, TN. We had bad intermittent noise on our VHF system. I determined that it was from the power line...but where. The yard was originally built in 1910, so there was plenty of antique insulators, etc... I finally convinced the power company to come out and they did a few times. Narrowed it down to a 3 phase feed where the old steam powerhouse used to be. The insulators had been hit by lightening and had burned traces and bits blown off. problem solved !
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