Re: long antenna

From	jmfbahciv <See.above@aol.com>
Newsgroups	sci.physics
Subject	Re: long antenna
Date	2015-11-24 13:20 +0000
Organization	"Have EDDT, will travel"
Message-ID	<PM0005254977CE6C61@aca4008d.ipt.aol.com> (permalink)
References	(15 earlier) <het6ic-d88.ln1@mail.specsol.com> <PM0005252272306D9B@aca41c74.ipt.aol.com> <t9i9ic-kah.ln1@mail.specsol.com> <PM00052535E3A4AF8D@aca41148.ipt.aol.com> <2vI4y.121236$dc2.13006@fx24.iad>

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benj wrote:
> On 11/23/2015 09:13 AM, jmfbahciv wrote:
>> jimp@specsol.spam.sux.com wrote:
>>> jmfbahciv <See.above@aol.com> wrote:
>>>> jimp@specsol.spam.sux.com wrote:
>>>
>>>> Thanks for the explanation :-).  The second AM radio interference
>>>> appeared last June; my current hypothesis is that some flavor of
>>>> home security system is interfering but I haven't figured out how to
>>>> test it.
>>>
>>> There are all sorts of things that will interfere with AM broadcast.
>>>
>>> There is currently a brouhaha over home improvement stores selling
>>> industrial fluorescent light ballasts that are not marked as such
>>> and are being put into homes. These ballasts generate huge amounts
>>> of RFI, which is fine for the industrial environment.
>>>
>>> Some common sources of RFI: fluorescent lights, furnace ignitors,
>>> electric fences, computer and networking systems, Uninterruptible Power
>>> Supplies, motorized exercise equipment, bad wiring, grow lights.
>>>
>>> Use a battery powered AM radio as a sniffer and you may be able to
>>> find the source. Try turning anything you may suspece off and on.
>>
>> I know it's not in the house.  Some day, I'll take my radio and
>> try to triangulate the first interference.  I don't know how to
>> investigate the second interference since the sound is constant
>> and is turned off/on early in the morning.
>>
>>>
>>>> OK.  I'll look into filters.  When I lived in Mass., I bought an
>>>> electric kitchen stove.  In order to listen to any AM radio, I had
>>>> to unplug the stove; filters didn't stop the interference.
>>>
>>> Nope, not much you can do about that except complain BOTH to the
>>> manufacturer and the FCC.
>>
>> I did complain to the stove manufacturer; the comment I got back
>> from the tech is that "noone listens to AM radio anymore".
>>
>>>
>>>> I don't know what was causing it.  My hypothesis is that something
>>>> having to do with road construction was the cause since it stopped
>>>> right after Labor Day.
>>>
>>> Really weird.
>>
>> Yea.  note it's just a hypothesis but it's the only thing I can
>> think of which is seasonal to match the dates of the problem.
>>>
>>>> I understand that.  When there is snow on the ground (even though
>>>> there are leaves on the trees) I have a lot less problems with
>>>> reception.  However, foliage shouldn't affect receiving a signal
>>>> for an hour or so and then no signal after that.
>>>
>>> That is just probably marginal propagation, a better antenna should
>>> cure that.
>>>
>>>> Everything is coax and the antenna is for digital.  It is not
>>>> an outdoor antienna; I had a new roof put on the house and
>>>> decided I didn't want any holes in it, so the outdoor antenna
>>>> went away (it was not coax).
>>>>
>>>> I simply don't understand digial; no experiments with antenna
>>>> postiioning works.  Some nights (I only have the TV on for
>>>> a couple hours each night) going into the bathroom can
>>>> interfere the reception; other nights moving my head while
>>>> I sit in the chair will interfere; (my chair is on the other
>>>> side of the antenna w.r.t. the tower).
>>>
>>> It is marginal signal propagation and being disturbed by things
>>> around the house.
>>
>> I assumed that but shouldn't the disturbances be constant and
>> reproducible w.r.t. position?  That's one of the things which
>> puzzles me.
>>>
>>> I'm afraid the only solution for TV is a real, outside antenna
>>> with coax.
>>>
>>> If you are dead set against holes in the roof, then a pole and
>>> an eve bracket.
>>
>> Yea :-( Putting up an outside antenna doesn't guarantee reception
>> if this palce in the midst of an interference whirlwind, especially
>> if I'm in the eye.
>>
>> Anyway Congress is on my big shit list for selling off the analog.
>>
>> /BAH
>
> Well, yes and no. The new system really gives fine images when it's
> working but it tends to cut out a lot. I live downtown and in the old
> days the UHF channels (PBS) were always a mess. The signal was strong,
> but bounced among the tall buildings creating havoc. Never got a decent
> picture. Now video is just prime, but tends to cut in and out for no
> apparent reason. The more things change.
>
> I also had a bad AM noise here. It would come and go. I tried using the
> portable radio to track it, but failed. It was clearly in the
> neighborhood and got weaker as you went further away, but was
> transmitted all through the power distribution system so you couldn't
> pinpoint it. My best guess was it was an industrial welder of some sort
> in the neighborhood, but I never found it. Eventually as industry moved
> out, the noise went with it.

I never thought of a welder.  That could be in anybody's garage.  But
if it were a welder, wouldn't the interference be gone during the night?

>
> Note that if some item is creating interference, you can complain to the
> FCC and they will require the owner (for industry) or the manufacturer
> to fix the problem. Telling you "nobody listens to AM" is not good
> enough. They won't have to fix all the ones they make, but they will
> have to come and install whatever filters it takes to solve YOUR problem.

they did try a filter.  It didn't work and they gave up.
>
> Same goes for jimp's Ham radio. If he's getting into his neighbor's TV
> or radio, FCC will make him go and provide filters, advice, etc. to fix
> the problem. Mostly hams are happy to do this and keep good relations
> with the community.

Legal hams are willing; the problems are the illegal hams.  Stores sell
lots of "toys" which create havoc.  Lasers and drones have been
making the news lately.

/BAH

Thread

long antenna RichD <r_delaney2001@yahoo.com> - 2015-11-17 10:42 -0800
  Re: long antenna Odd Bodkin <bodkinodd@gmail.com> - 2015-11-17 12:46 -0600
    Re: long antenna Poutnik <poutnik4nntp@gmail.com> - 2015-11-17 20:10 +0100
    Re: long antenna jimp@specsol.spam.sux.com - 2015-11-17 20:28 +0000
      Re: long antenna benj <nobody@gmail.com> - 2015-11-17 16:59 -0500
    Re: long antenna Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-11-18 22:56 +0100
      Re: long antenna gilber34 <fafa@invalid.com> - 2015-11-18 16:57 -0600
        Re: long antenna jimp@specsol.spam.sux.com - 2015-11-18 23:15 +0000
          Re: long antenna gilber34 <fafa@invalid.com> - 2015-11-18 20:42 -0600
            Re: long antenna jimp@specsol.spam.sux.com - 2015-11-19 05:29 +0000
              Re: long antenna gilber34 <fafa@invalid.com> - 2015-11-19 08:54 -0600
                Re: long antenna jimp@specsol.spam.sux.com - 2015-11-19 18:44 +0000
                Re: long antenna gilber34 <fafa@invalid.com> - 2015-11-22 15:32 -0600
                Re: long antenna jimp@specsol.spam.sux.com - 2015-11-22 23:16 +0000
            Re: long antenna HVAC <mr.hvac@gmail.com> - 2015-11-19 06:59 -0800
              Re: long antenna benj <none@gmail.com> - 2015-11-19 20:02 -0500
      Re: long antenna benj <none@gmail.com> - 2015-11-19 01:36 -0500
  Re: long antenna gilber34 <fafa@invalid.com> - 2015-11-17 13:28 -0600
  Re: long antenna "reber g=emc^2" <herbertglazier0@gmail.com> - 2015-11-17 14:04 -0800
    Re: long antenna jimp@specsol.spam.sux.com - 2015-11-17 22:35 +0000
      Re: long antenna benj <nobody@gmail.com> - 2015-11-17 19:28 -0500
        Re: long antenna Timo <timo@physics.uq.edu.au> - 2015-11-17 17:18 -0800
          Re: long antenna RichD <r_delaney2001@yahoo.com> - 2015-11-24 11:39 -0800
            Re: long antenna benj <none@gmail.com> - 2015-11-24 15:12 -0500
              Re: long antenna gilber34 <fafa@invalid.com> - 2015-11-26 09:21 -0600
                Re: long antenna gilber34 <fafa@invalid.com> - 2015-11-26 10:05 -0600
                Re: long antenna jimp@specsol.spam.sux.com - 2015-11-26 20:05 +0000
                Re: long antenna gilber34 <fafa@invalid.com> - 2015-11-26 18:39 -0600
                Re: long antenna jimp@specsol.spam.sux.com - 2015-11-27 01:46 +0000
                Re: long antenna jimp@specsol.spam.sux.com - 2015-11-26 19:55 +0000
            Re: long antenna jimp@specsol.spam.sux.com - 2015-11-24 20:04 +0000
              Re: long antenna gilber34 <fafa@invalid.com> - 2015-11-24 16:33 -0600
                Re: long antenna jimp@specsol.spam.sux.com - 2015-11-24 22:58 +0000
                Re: long antenna gilber34 <fafa@invalid.com> - 2015-11-26 09:11 -0600
                Re: long antenna jimp@specsol.spam.sux.com - 2015-11-26 19:42 +0000
                Re: long antenna "Ross A. Finlayson" <ross.finlayson@gmail.com> - 2015-11-26 11:57 -0800
                Re: long antenna gilber34 <fafa@invalid.com> - 2015-11-26 14:52 -0600
                Re: long antenna jimp@specsol.spam.sux.com - 2015-11-26 21:12 +0000
                Re: long antenna gilber34 <fafa@invalid.com> - 2015-11-26 18:58 -0600
                Re: long antenna jimp@specsol.spam.sux.com - 2015-11-27 01:37 +0000
                Re: long antenna benj <none@gmail.com> - 2015-11-26 23:45 -0500
                Re: long antenna gilber34 <fafa@invalid.com> - 2015-11-27 01:01 -0600
                Re: long antenna "Ross A. Finlayson" <ross.finlayson@gmail.com> - 2015-11-26 23:31 -0800
                Re: long antenna benj <nobody@gmail.com> - 2015-11-27 11:34 -0500
                Re: long antenna "Ross A. Finlayson" <ross.finlayson@gmail.com> - 2015-11-27 09:58 -0800
                Re: long antenna benj <nobody@gmail.com> - 2015-11-27 11:46 -0500
                Re: long antenna gilber34 <fafa@invalid.com> - 2015-11-28 16:42 -0600
                Re: long antenna jimp@specsol.spam.sux.com - 2015-11-28 22:58 +0000
                Re: long antenna gilber34 <fafa@invalid.com> - 2015-11-30 07:46 -0600
                Re: long antenna jimp@specsol.spam.sux.com - 2015-11-30 19:01 +0000
                Re: long antenna gilber34 <fafa@invalid.com> - 2015-11-30 14:12 -0600
                Re: long antenna jimp@specsol.spam.sux.com - 2015-11-30 20:43 +0000
                Re: long antenna gilber34 <fafa@invalid.com> - 2015-11-30 17:41 -0600
                Re: long antenna jimp@specsol.spam.sux.com - 2015-12-01 00:15 +0000
                Re: long antenna gilber34 <fafa@invalid.com> - 2015-11-30 20:23 -0600
                Re: long antenna jimp@specsol.spam.sux.com - 2015-12-01 06:21 +0000
                Re: long antenna benj <none@gmail.com> - 2015-11-30 15:22 -0500
                Re: long antenna jimp@specsol.spam.sux.com - 2015-11-30 20:48 +0000
                Re: long antenna gilber34 <fafa@invalid.com> - 2015-11-30 17:16 -0600
                Re: long antenna jimp@specsol.spam.sux.com - 2015-11-30 23:52 +0000
                Re: long antenna gilber34 <fafa@invalid.com> - 2015-11-30 19:59 -0600
                Re: long antenna jimp@specsol.spam.sux.com - 2015-12-01 02:16 +0000
                Re: long antenna benj <none@gmail.com> - 2015-11-30 19:20 -0500
                Re: long antenna jimp@specsol.spam.sux.com - 2015-11-27 18:53 +0000
              Re: long antenna benj <none@gmail.com> - 2015-11-25 00:08 -0500
                Re: long antenna jimp@specsol.spam.sux.com - 2015-11-25 06:13 +0000
  Re: long antenna "reber g=emc^2" <herbertglazier0@gmail.com> - 2015-11-18 16:25 -0800
  Re: long antenna "reber g=emc^2" <herbertglazier0@gmail.com> - 2015-11-19 16:08 -0800
    Re: long antenna jimp@specsol.spam.sux.com - 2015-11-20 00:40 +0000
      Re: long antenna "reber g=emc^2" <herbertglazier0@gmail.com> - 2015-11-20 15:51 -0800
        Re: long antenna jimp@specsol.spam.sux.com - 2015-11-21 00:34 +0000
          Re: long antenna jmfbahciv <See.above@aol.com> - 2015-11-21 14:37 +0000
            Re: long antenna jimp@specsol.spam.sux.com - 2015-11-21 19:32 +0000
              Re: long antenna jmfbahciv <See.above@aol.com> - 2015-11-22 14:50 +0000
                Re: long antenna "reber g=emc^2" <herbertglazier0@gmail.com> - 2015-11-22 11:27 -0800
                Re: long antenna jimp@specsol.spam.sux.com - 2015-11-22 19:44 +0000
                Re: long antenna jimp@specsol.spam.sux.com - 2015-11-22 19:40 +0000
                Re: long antenna jmfbahciv <See.above@aol.com> - 2015-11-23 14:13 +0000
                Re: long antenna benj <none@gmail.com> - 2015-11-23 13:00 -0500
                Re: long antenna jmfbahciv <See.above@aol.com> - 2015-11-24 13:20 +0000
                Re: long antenna benj <none@gmail.com> - 2015-11-24 13:40 -0500
                Re: long antenna jmfbahciv <See.above@aol.com> - 2015-11-25 13:44 +0000
                Re: long antenna jimp@specsol.spam.sux.com - 2015-11-23 18:47 +0000
                Re: long antenna jmfbahciv <See.above@aol.com> - 2015-11-24 13:20 +0000
                Re: long antenna jimp@specsol.spam.sux.com - 2015-11-24 19:49 +0000
                Re: long antenna gilber34 <fafa@invalid.com> - 2015-11-24 16:36 -0600
                Re: long antenna jimp@specsol.spam.sux.com - 2015-11-24 23:00 +0000
                Re: long antenna gilber34 <fafa@invalid.com> - 2015-11-26 16:17 -0600
                Re: long antenna jimp@specsol.spam.sux.com - 2015-11-26 23:35 +0000
        Re: long antenna benj <none@gmail.com> - 2015-11-20 20:58 -0500
    Re: long antenna benj <none@gmail.com> - 2015-11-19 20:09 -0500
  Re: long antenna "nuny@bid.nes" <Alien8752@gmail.com> - 2015-11-24 12:51 -0800
    Re: long antenna benj <none@gmail.com> - 2015-11-25 00:01 -0500
  Re: long antenna "reber g=emc^2" <herbertglazier0@gmail.com> - 2015-11-25 15:36 -0800
    Re: long antenna jimp@specsol.spam.sux.com - 2015-11-25 23:51 +0000

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