CB Radio Interference
Bhroam Mann
I hope someone out there can help me with my problem. I went searching on the
web and deja.com and couldn't find any help.
My neighbors CB radio (large antenna on his roof) has been coming on my home
theater. I can't seem to figure out how to stop it.
My home theater system
I have a JVC AV receiver and the normal 6 speakers. There is about 50 ft of
speaker cable between my rears in my receiver. The fronts have 10, and center
has about 10 also. I have DishNetwork satellite service and cable. I also
have a bunch of other components (DVD, CD etc)
I wouldn't hear my neighbor if my receiver was off. I didn't hear him on my
other TV w/ cable & satellite. I would hear him no matter what my receiver
was set to (cable, satellite, even DVD).
Things I have tried to do to isolate the problem:
1. remove satellite cable from receiver
2. add a high pass filter to my cable
3. remove my cable wire (also with the satellite cable).
I finally started messing with all the settings on the receiver. I wasn't
getting anywhre. I tried turning up the volume and muting it. I wasn't
effecting the volume of the radio voice. I finally tried turning off my Dolby
decoder. The interference went away.
This told me that my receiver's DPL decoder was the problem. I took the
receiver into the shop and got a loaner. To my discust, last night I got my
not only my neighbor, but someone else also.
Now I figure its not my receiver's problem, but something else. I am getting
desprete here... can anyone help me?
Thanks
Bhroam
--
--------------------------------------------------------------------------------
Bhroam Alex Mann
hawk...@rahul.net
--------------------------------------------------------------------------------
grey...@newsguy.com
>Hello all
>I hope someone out there can help me with my problem. I went searching on the
>web and deja.com and couldn't find any help.
>
>My neighbors CB radio (large antenna on his roof) has been coming on my home
>theater. I can't seem to figure out how to stop it.
<snip>
>Now I figure its not my receiver's problem, but something else. I am getting
>desprete here... can anyone help me?
It sounds like your neighbor probably has an illegal power booster for
his CB. The first step is to talk with your neighbor and see if he
can install a filter in his system that will reduce/eliminate the
problem. If he's unwilling to work with you on this, contact the FCC
- they'll be sure to help you out if he's using illegal equipment (I'm
assuming you're in the United States as you don't mention where you're
from and your email address doesn't give me any hints).
--
Geoffrey Reynolds
Bhroam Mann
From the impression I got from my neighbor, he is rather ignorant of radio
for the most part. I am sure he is willing to work with me, but I don't think
he knows what to do.
So what type of filter should he get? Also, how can I find out if he is
transmitting over the legal power limits. I would rather not contact the
FCC until I have exausted every other option. I'd rather stay on good terms
with my neighbors.
And yes, I am in the United States.
Thanks!
BT S
Go to radio shack and buy half a dozen or so of what they call RF(or
ferrite)choke cores. You may also want to look at the ones called
torroid choke cores,I'm not sure if that is the actual name that RS
calls them,but they should be able to figure it out.Follow the
directions and apply them to your interconnects and your ac power
cord.The more turns of your wire you can get around the torroid type
the more effective it will be.
hawk...@rahul.net (Bhroam Mann) Wrote:
Hello all
I hope someone out there can help me with my problem. I went searching
on the web and deja.com and couldn't find any help.
My neighbors CB radio (large antenna on his roof) has been coming on my
home theater. I can't seem to figure out how to stop it.
My home theater system
I have a JVC AV receiver and the normal 6 speakers. There is about 50 ft
of speaker cable between my rears in my receiver. The fronts have 10,
and center has about 10 also. I have DishNetwork satellite service and
cable. I also have a bunch of other components (DVD, CD etc)
I wouldn't hear my neighbor if my receiver was off. I didn't hear him on
my other TV w/ cable & satellite. I would hear him no matter what my
receiver was set to (cable, satellite, even DVD).
Things I have tried to do to isolate the problem:
1. remove satellite cable from receiver
2. add a high pass filter to my cable
3. remove my cable wire (also with the satellite cable).
I finally started messing with all the settings on the receiver. I
wasn't getting anywhre. I tried turning up the volume and muting it. I
wasn't effecting the volume of the radio voice. I finally tried turning
off my Dolby decoder. The interference went away.
This told me that my receiver's DPL decoder was the problem. I took the
receiver into the shop and got a loaner. To my discust, last night I got
my not only my neighbor, but someone else also.
Now I figure its not my receiver's problem, but something else. I am
getting desprete here... can anyone help me?
Sully
All rights (If I have any left) are reserved.
Brian L. McCarty
----------
In article <7r75mi$7ou$1...@samba.rahul.net>, Bhroam Mann <hawk...@rahul.net>
wrote:
> My neighbors CB radio (large antenna on his roof) has been coming on my home
> theater. I can't seem to figure out how to stop it.
>
> Things I have tried to do to isolate the problem:
> 1. remove satellite cable from receiver
> 2. add a high pass filter to my cable
> 3. remove my cable wire (also with the satellite cable).
Try calling your local FCC office and lodging a complaint.
Sounds like he's running "hot" (with an illegal power amplifier); there is
no reason that a standard-power CB rig would be leaking into your hi-fi.
Zipser is a liar http://dejanews.com/=dnc/getdoc.xp?AN=369217967
Zipser is a scammer http://dejanews.com/=dnc/getdoc.xp?AN=368363274
Zipser is a cheater http://dejanews.com/=dnc/getdoc.xp?AN=374900703
Zipser is a THIEF http://dejanews.com/=dnc/getdoc.xp?AN=509980240
Murray Peterson
>So what type of filter should he get? Also, how can I find out if he is
>transmitting over the legal power limits. I would rather not contact
>the FCC until I have exausted every other option. I'd rather stay on
>good terms with my neighbors.
>
>And yes, I am in the United States.
>
>Thanks!
>
>Bhroam
>
You should be asking this question in one of the ham-radio groups,
since there should be lots of experts there. My father is a ham radio
operator, and the little I learned from him indicates that a <lot>
of the time, problems like yours are actually faults with your
equipment (or set up). Bringing in the FCC may be embarrasing
if it turns out to be a bad connector somewhere in your system.
I definitely wouldn't start accusing my neighbour of using an illegal
amplifier -- not the best for good relations.
--
Murray Peterson
Email: Can be found on my home page
URL:http://www.members.home.net/murraypeterson
Ray Ortgiesen
Hello
As one of those "evil" amateur radio operators, and a home theater
enthusiast, I get it from both sides :)
I do run high power, perfectly legal 1500 watts into a big antenna on
a tower.
Without any filters on my HT equipment, I shutdown my Yamaha 992 amp
everytime I transmitted on 15 meters (21 MHz). I purchased a bagfull
of ferrite filters frm an electronics supplier(I believe Radio Shack
also sells them). I attached the filters to each end of "every"
cable, including power cables. No more intereference at all.
Incidently, I installed $200 worth of filters(a new type, called
"common mode") on my transmitter and amplifier, and it did not help.
The HT gear was susceptable, and there is nothing I can do at the
transmitter side to make the HT gear better.
The end result? I can now run full legal limit power and my family
can watch a dvd or tv at the same time.
Have patience when trying various combinations and permutations,
you'll eventually find the one that resolves the issue with minimal
hassle with your neighbor(don't expect him to pay for the filters).
73 (means best wishes)
Ray
wf1b
On 9 Sep 1999 02:23:14 GMT, Bhroam Mann <hawk...@rahul.net> wrote:
>Hello all
>I hope someone out there can help me with my problem. I went searching on the
>web and deja.com and couldn't find any help.
>
>My neighbors CB radio (large antenna on his roof) has been coming on my home
>theater. I can't seem to figure out how to stop it.
>
>My home theater system
>I have a JVC AV receiver and the normal 6 speakers. There is about 50 ft of
>speaker cable between my rears in my receiver. The fronts have 10, and center
>has about 10 also. I have DishNetwork satellite service and cable. I also
>have a bunch of other components (DVD, CD etc)
>
>I wouldn't hear my neighbor if my receiver was off. I didn't hear him on my
>other TV w/ cable & satellite. I would hear him no matter what my receiver
>was set to (cable, satellite, even DVD).
>
>Things I have tried to do to isolate the problem:
>1. remove satellite cable from receiver
>2. add a high pass filter to my cable
>3. remove my cable wire (also with the satellite cable).
>
>
>I finally started messing with all the settings on the receiver. I wasn't
>getting anywhre. I tried turning up the volume and muting it. I wasn't
>effecting the volume of the radio voice. I finally tried turning off my Dolby
>decoder. The interference went away.
>
>This told me that my receiver's DPL decoder was the problem. I took the
>receiver into the shop and got a loaner. To my discust, last night I got my
>not only my neighbor, but someone else also.
>
>Now I figure its not my receiver's problem, but something else. I am getting
>desprete here... can anyone help me?
>
>Thanks
>Bhroam
Luke Oliver
I used to be half way familliar with CB radios and it's a pretty safe
bet that your neighbor is running an amplifier or "footwarmer" in
redneck terms. I would talk to your neighbor and see if he can't get
the problem resolved on his end.
If he does not cooperate there are 2 things you can do:
1) Call the FCC and they will come out and give him a big fine and take
his illegal equipment and stuff. It's a big mess and might be a little
bit excessive.
2) see if you can find where his coax for his antenna comes out of the
house and up to his antenna. If it is easily to get to then take a
strait pin and push it through the coax making sure that you get it
through the very center and it touches the center conductor. Then cut
the ends off to where he can't find where you stuck the pin in. What
this will do is raise his SWR to a dangerous level and will probably
smoke his transmitter the second that he keys down the mic. Only do
this if he is uncooperative.
Luke
grey...@newsguy.com
>As one of those "evil" amateur radio operators, and a home theater
>enthusiast, I get it from both sides :)
The evil ones are the runs running CB's with illegal boosters with no
concern for how it affects everyone else around them.
>I do run high power, perfectly legal 1500 watts into a big antenna on
>a tower.
If you're talking ham radio, it's sort of a different animal :).
>Have patience when trying various combinations and permutations,
>you'll eventually find the one that resolves the issue with minimal
>hassle with your neighbor(don't expect him to pay for the filters).
I agree with the have patience comment so long as the neighbor is
trying to help with the problem. However, I strongly feel that if the
neighbor's equipment is causing the interference, he (or she) should
be expected to foot the bill (or at least part of it) for eliminating
it. My understanding has always been that the person running the
transmitting equipment is responsible for any costs in eliminating
interference.
--
Geoffrey Reynolds
Ned Hamilton
and some
CBs are) the recipient of the interference is responsible for the fix.
This sounds unfair until you realize that the manufacturers of electronics
know perfectly well that their equipment is sensitive to strong rf. They can
design their
equipment to prevent rf interference if they want but most choose to ignore
the
problem because they know that only 1/10% of consumers will be affected.
<grey...@newsguy.com> wrote in message
news:37e63d41....@enews.newsguy.com...
Ray Ortgiesen
>I agree with the have patience comment so long as the neighbor is
>trying to help with the problem. However, I strongly feel that if the
>neighbor's equipment is causing the interference, he (or she) should
>be expected to foot the bill (or at least part of it) for eliminating
>it. My understanding has always been that the person running the
>transmitting equipment is responsible for any costs in eliminating
>interference.
Actually, it is the fault of the recieving equipment, and you will not
win any battle (in court or otherwise), others have tried, and failed.
Many electronics manufacturers make many shortcuts, to reduce customer
cost, and increase profits. As an example, most phones have no
filtering in them whatsoever, Radio Shack sells a RFI-bulletproof
phone for abt 75 bucks. I suspect most people say, I'm not paying
that much for a phone... oh well.
Some earlier poster suggested vandalizing his neighbors property with
a pin. This will backfire for certain. Once you stoop to a level
that low, there will be no turning your back.
I did some research (something the original poster should do is go
read some of these pages, _especially_ the fcc pages on interference.
73, Ray
From the FCC www site:
B. TWO-WAY RADIO INTERFERENCE
The steps listed below may help you to eliminate TV interference that
you
experience from CB, amateur or other two-way radio stations. High-pass
filters, common-mode chokes (choke filters), snap-together ferrite
cores and
ac-line filters are available from local electronics and department
stores.
A list of sources of filters is also provided at the end of this book.
Remember, if your TV set or VCR has insufficient filtering or
shielding, you
may not be able to correct the interference yourself. You will have to
obtain help from the manufacturer.
1. CB or Amateur Interference: Check to see if the TV volume control
affects
the interference level. If it does, install a "high-pass filter" at
the
antenna leads. This is a filter which will not allow signals in the
the low
part of the radio spectrum to pass through it. The name "high pass
filter"
is all you need to know to purchase one. If the TV volume control has
no
effect on the interference level, go to step 4. If you still receive
the
interference after installing a high-pass filter, go to step 3.
2. Two-way FM Interference: If you are receiving two-way FM
transmissions,
such as police or taxi, you may need to install a "notch" or
"band-reject"
filter at the TV antenna leads. The filter must be designed to reject
the
specific transmissions that you are receiving. The electronics dealer
where
you purchase the filter should be able to assist you with your
selection. If
you still receive the interference after installing a notch filter,
continue
to the next step.
3. Install a common-mode filter (see list) and/or common-mode choke at
the
TV input. If you still receive the interference, go to the next step.
4. Disconnect the antenna lead from the TV set. If you still have the
interference with the antenna disconnected, install an ac- line filter
at
the electrical outlet your TV is plugged into.
Try wrapping three or four turns of the TV set's power cord through a
ferrite core. Do this as close to the TV set as possible. You may also
install a ferrite core on the antenna coaxial cable where it enters
the TV
set. You local electronics store will know what a ferrite core is and
willl
help you select one.
Important links to check out:
http://www.fcc.gov/cib/Publications/tvibook.html
http://www.arrl.org/tis/info/rfigen.html
http://www.fcc.gov/Bureaus/Compliance/WWW/tiabuln.html
http://www.sncmfg.com/telecom/noise_protection/rid.html
http://www.mara.org/howto/tvi.html
http://www.sympac.com.au/~elray/interf.htm
http://www.rbitem.com/ITEM_Publications/ITEM_Archives/u97art04.htm
http://www.radioworks.com/nbgnd.html
http://www.radioworks.com/crfi.html
http://www.contesting.com/_rfi/
http://www.elink.net/cm/ch18.htm
http://www.electricnet.com/category/t_rfitvi.htm
http://www2.arrl.org/tis/bibs/rfi.html
ftp://oak.oakland.edu/pub/hamradio/arrl/infoserv/bibliog/
http://www.arrl.org/tis/info/tvi.html
http://www.qth.net/archive/tvi-rfi-emi/
http://www.ktbx.demon.co.uk/tvi1.html
http://www.universal-radio.com/catalog/books/3378.html
http://www.radio-ware.com/rwfilter.htm
PhoneDude
news:37d9c7ae....@news.rdc1.on.home.com...
[FCC stuff and links snipped -=- see original post]
Actually this is good advise, especially the part about the vandalism.
That's a downhill road with no positive return. I just wanted to add
one note to Ray's advice. If the interference is indeed coming from a
CB transmitter then your neighbor may very well be using a linear
amplifier to boost his signal -- illegal unless licensed. A normal
transmitter will rarely cause interference. If you suspect this to be
true you can complain to the FCC. The problem then becomes your
neighbor's.
PhoneDude
Wayne E. Higley, Jr.
help you out.
Luke Oliver
considered as a last resort.
I'm not a scum bag vandal, just that sometimes you have to deal with
people who can not be dealt with in a civilized manner.
Pamela Hughes
Try some ferrite beads on the speaker cables first. That is where
the interference usually leaks into the amp. (CB is on 29MHz so
it wouldn't be to difficult for you to build some low pass filters
to insert between amp and speaker cables). Ferrite core on the
power cord couldn't hurt anything either.
Ray Ortgiesen
wrote:
>Try some ferrite beads on the speaker cables first. That is where
>the interference usually leaks into the amp. (CB is on 29MHz so
>it wouldn't be to difficult for you to build some low pass filters
>to insert between amp and speaker cables). Ferrite core on the
>power cord couldn't hurt anything either.
Just to be a little picky :)
Ferrites on the speaker leads worked great for me.
"but"
A low pass filter passes low-frequencies and attenuates high
frequencies. So a low-pass filter installs on the transmitter end.
A high-pass filter attenuates the low frequencies, and passes the high
ones, which is what we would want to install on our home theater
equipment!
73, Ray
wf1b
Pamela Hughes
Are you sure about that? I'm talking putting a filter on each amp
speaker output that will low-pass signals below 1MHz (should be
high enough for it not to affect audio frequencies) and attenuate
signals above 1MHz (knee point low enough that it should have some
serious attenuation at 30MHz). Maybe loop each speaker wire in a
cable through a type 6 (red) core a few times and then short them
together with a small capacitor then a couple of more ferrites to
form sort of an "H" filter (say 50 to 100 pf or whatever works...
too lazy to do the math to figure the exact component values).
73,-great magazine, btw..- you a ham? Guy at work keeps trying to
talk me into taking the no-code tech class test, ever since I sat
in the break room and yakked radios with him one day <g>
phu...@omnilinx.net
Ray Ortgiesen
wrote:
>Are you sure about that? I'm talking putting a filter on each amp
>speaker output that will low-pass signals below 1MHz (should be
>high enough for it not to affect audio frequencies) and attenuate
>signals above 1MHz (knee point low enough that it should have some
>serious attenuation at 30MHz). Maybe loop each speaker wire in a
>cable through a type 6 (red) core a few times and then short them
>together with a small capacitor then a couple of more ferrites to
>form sort of an "H" filter (say 50 to 100 pf or whatever works...
>too lazy to do the math to figure the exact component values).
Getting beyond my knowledge now... when I refer to "low-pass" I refer
to devices that can be purchased at an electronics store. As such, a
low pass passes < 30MHz.
A low pass fopr under 1 MHz? Now that's a concept I hadn't thought of
:) Why not pass everything under 100KHz hi hi (ham speak for LOL).
Yep, I am a "ham", been one for the last 21 years (I'm 36 now).
73 is shorthand for best wishes, regards, etc...
73, Ray
wf1b