| Author |
Message |
    
Kid_vicious
Intermediate Member
Username: Kid_vicious
Post Number: 238
Registered: 9-2004
| | Posted on Sunday, February 27, 2005 - 7:16 pm: | 
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i have not been able to make any CEF connections yet because of a carrier on ch.14. this carrier is either alternating beeps, or a continuous sinewave, or a series of quick beeps. it comes and goes and was on when i turned on the radio this morning, and was gone bylte afternoon.(too late to talk to anyone.) someone on the radio said its probably a cell phone tower. i would like to build a direction finding antenna to find the source; whatever it is. does anyone know how to make one? or does anyone know if what im describing is a cell tower or not? HELP! im missing all the fun!
matt |
Road_warrior
Intermediate Member
Username: Road_warrior
Post Number: 316
Registered: 7-2004
| | Posted on Monday, February 28, 2005 - 12:51 am: |
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Do you have any Chiropractor (back doc) offices
close by your home??? Machines they use cause
this type of interference./ I have cell phone
towers close, never recieved any noise from
them./ If you have a Walkie Talkie or mobile
Cb radio you can easily track it down./ Its
probably within a few blocks or more from your
home.
JIM/CENTRAL PA/CEF 375 |
Road_warrior
Intermediate Member
Username: Road_warrior
Post Number: 317
Registered: 7-2004
| | Posted on Monday, February 28, 2005 - 1:05 am: |
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Check & see if the carrier is in there the
same times everyday./ Since today is Sunday
most places are closed, at least they are
around here./ Check for any businesses that
operate on Sunday ect. ect./ If you have a mobile
Cb drive around until you get a strong signal.
It could be from a business or a homeowner
creating the noise./ If it stops about the same
time everyday, then more & likely its a business.
JIM/CENTRAL PA/CEF 375 |
Kid_vicious
Intermediate Member
Username: Kid_vicious
Post Number: 242
Registered: 9-2004
| | Posted on Monday, February 28, 2005 - 10:41 pm: |
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yes, it does seem to be on at regular intervals. i have tracked this signal to within a mile radius of my house, but its so strong in this area that i cant get a closer reading on it.
i need to build a direction finding loop antenna, just dont know how. the reason i suspect it might be a CB, is because most old walkie talkies from radio shack came from the factory with one crystal in them. what channel was the crystal ALWAYS for? ch14!
thanks for all and any help
matt |
Jp1116
Member
Username: Jp1116
Post Number: 94
Registered: 5-2002
| | Posted on Tuesday, March 01, 2005 - 7:51 am: |
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Turn your rf gain down as you get closer, maybe even unplug the antenna and then use the RF gain. You will be able to get closer that way. |
Hotwire
Intermediate Member
Username: Hotwire
Post Number: 141
Registered: 1-2005
| | Posted on Tuesday, March 01, 2005 - 10:48 am: |
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I have the same prob on channel 38. It seems to be an AM carrier but when I go Lower sideband it becomes a loud high pitch hum. Only at night. I think somebody is trying to jam local sidebanders |
Mdiver
Intermediate Member
Username: Mdiver
Post Number: 232
Registered: 11-2003
| | Posted on Tuesday, March 01, 2005 - 10:53 am: |
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Kid vicious
Thanks for your post... I also need how to build directional finding antenna
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Road_warrior
Intermediate Member
Username: Road_warrior
Post Number: 321
Registered: 7-2004
| | Posted on Tuesday, March 01, 2005 - 8:16 pm: |
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I found 95% of my noise sources using a
Walkie Talkie, hasn't let me down yet.
And as Jp1116 said, if using your mobile
use Rf gain or remove coax from your radio.
You will then be able to pinpoint the
noise source.
JIM/CENTRAL PA/CEF 375 |
Kid_vicious
Intermediate Member
Username: Kid_vicious
Post Number: 244
Registered: 9-2004
| | Posted on Tuesday, March 01, 2005 - 9:13 pm: |
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i've been trying to locate it with the rf gain down, the problem is that my mobile is an rci2950, and the light bars read the same for an s-5 signal as they do for an s-9 signal. when i remove the coax from the radio its gone. this is why i think that a direction finding antenna is the way to go. plus i want to know how to use one anyway. seems like a good skill to have if youre into radios. i doubt they are hard to construct. im guessing that i could build one out of a T connector and some coax. then you probably have to mount it to something that you can rotate but that shouldnt be too hard. i might also need some advice on what to do if it turns out to be coming from a house.
thanks for all the help so far guys.
matt |
Road_warrior
Intermediate Member
Username: Road_warrior
Post Number: 323
Registered: 7-2004
| | Posted on Wednesday, March 02, 2005 - 12:25 am: |
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If you unplug your coax & its gone, then
your not close enough to the signal yet./
You may want to make a new post on how to
build a direction finding loop./
If its coming from a house or business its
going to be a touchy situation in approaching
them./ When i contacted the Chiroprators office
they more or less told me to take a flying
leap, but, someplaces will work with you, if
your lucky & if its not to expensive for them
to correct the problem./ Hopefully, if its a
homeowner they are happy-go-lucky---LOL
JIM/PA/CEF375
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Tinker91
New member
Username: Tinker91
Post Number: 3
Registered: 2-2005
| | Posted on Wednesday, March 02, 2005 - 9:12 pm: |
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Kid Vicious if it is with in a mile of your home just drive around with a SWR/Field Strength meter as a directional finding antenna. It will lead you right to the front door. I have done this a lot back in the 70 and 80's. still have the meter and use it to check the out put pattern of Antennas
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Kid_vicious
Intermediate Member
Username: Kid_vicious
Post Number: 247
Registered: 9-2004
| | Posted on Wednesday, March 02, 2005 - 9:18 pm: |
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i think a new post is a good idea. thank you for all your help. you'll know i found it when you hear me on the net!
matt |
Scrapiron63
Advanced Member
Username: Scrapiron63
Post Number: 781
Registered: 12-2001
| | Posted on Thursday, March 03, 2005 - 12:20 pm: |
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Some radios have a harmonic oscillation hum or noise from the radio itself right on channel 13. A tech on this forum explained it sometime back. My Magnum S-45 happens to be one of those, it's about a "3" on the signal meter, so I can still hear most stations over the noise, but it's there. One channel either way and it's gone. My saturn doen't have the noise but I haven't checked my galaxy and ranger mobiles yet. |
Mdiver
Intermediate Member
Username: Mdiver
Post Number: 235
Registered: 11-2003
| | Posted on Thursday, March 03, 2005 - 1:16 pm: |
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Kid found this website of many out there
http://home.att.net/~jleggio/projects/rdf/rdf.htm |
Road_warrior
Intermediate Member
Username: Road_warrior
Post Number: 338
Registered: 7-2004
| | Posted on Thursday, March 03, 2005 - 10:14 pm: |
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Now, just tonight i started getting a
ear piecing ringing noise on ch 15A...lol
9 1/2 db signal...Deafning!
Glad i don't talk on that channel...lol
Can't track it because my mobile or
walkie talkie doesn't have that channel.
JIM/PA/CEF 375 |
Kid_vicious
Intermediate Member
Username: Kid_vicious
Post Number: 251
Registered: 9-2004
| | Posted on Thursday, March 03, 2005 - 10:44 pm: |
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thanks mdiver, i dont know if it would be practical to make one of these for 27mhz, but im glad i now know how.
tinker91, could you give me some details on how to use the field strength meter for this purpose?
i have an old knight 10-2 that would be great for this.
thanks to both of you.
matt |
Kid_vicious
Intermediate Member
Username: Kid_vicious
Post Number: 252
Registered: 9-2004
| | Posted on Thursday, March 03, 2005 - 10:46 pm: |
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could this be the dreaded BPL we're all fearing?
matt |
Tinker91
New member
Username: Tinker91
Post Number: 4
Registered: 2-2005
| | Posted on Friday, March 04, 2005 - 2:18 am: |
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Matt it is easy and works on 10, 11 and 12 meter. It does not work real good on SSB. If they use a amp it is real easy. Use the S meter on your mobile radio. When it max's out then use the Field Strength meter. The closer you get the higher the reading will be on the meter. The longer the antenna is on the meter will have more range. I have 3 antennas for mine. With the long one I can geat a reading on it about four blocks away from the source. when the meter pegs out I go to a shorter antenna and start all over agine. it takes time but it is fun to track some one down that likes to dead key when others are trying to talk.
Back a very long time ago we had a guy in the area that would not let anyone talk. We tracked him down this way. We put his address out on the air, but he would not take the hint. A little later someone put a pin in his coax and that put him and his radio and amp off the air. No it was not me, I was at sea at the time it happen. Play with your Field Strength meter around the house and see what happens. |
Kid_vicious
Intermediate Member
Username: Kid_vicious
Post Number: 258
Registered: 9-2004
| | Posted on Saturday, March 05, 2005 - 8:22 pm: |
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thanks tinker91, i'll gewt my first chance to try this tomorrow. either that or i'll actually be on the net!
matt |
Road_warrior
Intermediate Member
Username: Road_warrior
Post Number: 350
Registered: 7-2004
| | Posted on Monday, March 07, 2005 - 6:34 pm: |
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How did you make out with your noise
tracking adventures KId -V???
My new noise was only in there for a few
days & has disappeared...
JIM/PA/CEF 375
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Kid_vicious
Intermediate Member
Username: Kid_vicious
Post Number: 264
Registered: 9-2004
| | Posted on Monday, March 07, 2005 - 10:21 pm: |
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road warrior, you aren't going to believe this.
the noise on 14 hasn't returned. i was able to make a couple of contacts on the cef net. CEF 463 i think. the only interference i had was mexico and the bleedover from 19 and ch.6.
i wonder why the chosen net freq. is equidistant between the two biggest bleedover channels.
here's the part you wont believe. while flpping through the dial today, i heard a very distinct beeping noise on what channel you may ask? 15A!
go figure.
matt |
Captian_radio
Junior Member
Username: Captian_radio
Post Number: 21
Registered: 9-2004
| | Posted on Tuesday, March 08, 2005 - 7:19 am: |
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Kid Vicious check out my post of a couple of weeks ago on CEF net connections, I explained that your noise might be comming from a cordless mouse from someones PC . They transmit on all the RC or A channels mostly 27.145= 15a.Have a read , same thing happens here from time to time.
Good luck , Bob CEF451
= |
Chad
Intermediate Member
Username: Chad
Post Number: 184
Registered: 11-2004
| | Posted on Tuesday, March 08, 2005 - 9:07 am: |
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The battery in the RF grenade somebody threw in your gutter died  Check your gutter for tennis balls.
Just kidding!
Chad |
Racer_x
Intermediate Member
Username: Racer_x
Post Number: 123
Registered: 2-2005
| | Posted on Tuesday, March 08, 2005 - 5:59 pm: |
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Gee - I've never heard of that Chad I can see where a nice wide banded oscillator placed very close the the antenna of someone with a very dirty radio would make it difficult for him to hear anything at all for days and days.
It's safer and less destructive than pinning coax too. |
Kid_vicious
Intermediate Member
Username: Kid_vicious
Post Number: 270
Registered: 9-2004
| | Posted on Tuesday, March 08, 2005 - 6:25 pm: |
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no wonder the dog wont touch it! LOL
captain radio, thanks for the response! i'll check that post right now.
matt |
Allagator
Advanced Member
Username: Allagator
Post Number: 556
Registered: 9-2002
| | Posted on Tuesday, March 08, 2005 - 6:49 pm: |
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HEY KID VICIOUS !
try this !!!!
1-3-way switch box .
2-peice of wire hooked to some coax on top of the car or truck .
3- 3" of wire from a PL 259
hook this all up to your mobile and drive around
till you find your noise !
when you start picking it up switch to the wire antenna and drive around till it gets louder !
now the 3" of wire is to get rite up the the door of the noise or where it is comming from !
I hope this will help you as it did me !!!!!
Allagator !! |
Kid_vicious
Intermediate Member
Username: Kid_vicious
Post Number: 273
Registered: 9-2004
| | Posted on Tuesday, March 08, 2005 - 9:20 pm: |
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thank you allagator!!
i will be trying this soon!
matt |
S2art
Junior Member
Username: S2art
Post Number: 26
Registered: 2-2004
| | Posted on Wednesday, March 09, 2005 - 12:51 am: |
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I have a directional loop I bought form copper about 15 years ago (from the old paper catalog). It still works and I still use it. Actually I purchased several, the first being destroyed during a very exciting night of signal hunting, beer drinking, and several high-speed car chases. Oh to be young and stupid again! (I was born in 1966)
I tried to find a loop on the Copper website, but with no luck. Maybe I didn’t look hard enough. Perhaps when I hit my mid-life crisis, I might attempt another adventure like that, except replace the beer with something stronger like Geratol.
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Kid_vicious
Intermediate Member
Username: Kid_vicious
Post Number: 277
Registered: 9-2004
| | Posted on Wednesday, March 09, 2005 - 4:17 pm: |
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s2art, if you can still reach that loop antenna in the junk bin, could you give me a few of the design details? radius, feed, etc.
thanks,
matt |
