Tracing coaxial cables - diyAudio
Go Back   Home > Forums > General Interest > Everything Else

Everything Else Anything related to audio / video / electronics etc) BUT remember- we have many new forums where your thread may now fit! .... Parts, Equipment & Tools, Construction Tips, Software Tools......

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 11th August 2008, 06:05 PM   #1
diyAudio Member
 
weinstro's Avatar
 
Join Date: May 2003
Default Tracing coaxial cables

This is probably a long shot, but I need some advice on how to trace (find) coaxial cables installed in a wall.

I know where one end is, but not the other.

Thanks!
  Reply With Quote
Old 11th August 2008, 06:42 PM   #2
diyAudio Member
 
jan.didden's Avatar
 
Join Date: May 2002
Location: Great City of Turnhout, Belgium
Blog Entries: 7
Where I live, the local 'home depot' sells small battery-powered thingies that locate any cabling or piping, as long as it is metallic, in a wall. I don't know how they are called at your end, probably something like 'cable finder'...

Jan Didden
__________________
If you don't change your beliefs, your life will be like this forever. Is that good news? - W. S. Maugham
Check out Linear Audio!
  Reply With Quote
Old 11th August 2008, 06:58 PM   #3
diyAudio Member
 
Peter Daniel's Avatar
 
Join Date: Jul 2002
Location: Toronto, Canada
Send a message via AIM to Peter Daniel
Maybe this could work: http://www.homedepot.com/webapp/wcs/...ctId=100395149
__________________
www.audiosector.com
“Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC
  Reply With Quote
Old 13th August 2008, 05:23 PM   #4
DcibeL is offline DcibeL  Canada
diyAudio Member
 
DcibeL's Avatar
 
Join Date: May 2003
Location: Saskatchewan
That will find AC lines only (due to large radiating magnetic field). It will not find a coax cable with a small video signal or no signal at all.

If you know where one end of the cable is, and you want to find the other end, you can short the end that you do have (connect the centre conductor to the shield). Take your multimeter and check all the coax cables you can find, hopefully one of them will be shorted.
__________________
The power of Science compels you!
  Reply With Quote
Old 13th August 2008, 07:31 PM   #5
Elvee is online now Elvee  Belgium
diyAudio Member
 
Elvee's Avatar
 
Join Date: Sep 2006
Hi,

If you have access to one end and the other is more or less floating, you can use the kind of cable tracer used by telephone workers: it is a small device connected between the shorted pair (the coax braid in your case) and the ground (earth, distribution frame, pipe, etc.... ). It sends a powerful and characteristic audio signal which is picked up capacitively by a high impedance receiver. It can detect a cable at up to some tens of centimeters, if there isn't too much obstruction.
LV
  Reply With Quote
Old 14th August 2008, 06:42 AM   #6
diyAudio Member
 
weinstro's Avatar
 
Join Date: May 2003
Quote:
Originally posted by Elvee
Hi,

If you have access to one end and the other is more or less floating, you can use the kind of cable tracer used by telephone workers: it is a small device connected between the shorted pair (the coax braid in your case) and the ground (earth, distribution frame, pipe, etc.... ). It sends a powerful and characteristic audio signal which is picked up capacitively by a high impedance receiver. It can detect a cable at up to some tens of centimeters, if there isn't too much obstruction.
LV
That could work, thanks.

What I was initially thinking of was a device I used many years ago, where you would place a battery operated probe across the power leads in a junction box, and then walk around with a sniffer and follow the cable. It would work through metal conduits - pretty cool. I was stymied with coax, since it's shielded, but I like your approach. It worked by overlaying a high frequency signal (about 1-2 kHz) over the power line fundamental.

However, in the end, I had some notion of where I buried that cable in the wall, and just removed a 6 foot slice of drywall and found it. More work, but no fancy test gear to go buy.

Thanks for the creative suggestions!
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
coaxial adason Multi-Way 28 2nd June 2007 01:18 AM
ssabripo's DIY Interconnect cables: $200 cables for 1/10 th the cost! ssabripo Everything Else 3 26th October 2006 02:33 PM
Matching and curve tracing jan.didden Solid State 1 27th August 2004 03:57 AM
cables for diy amps, preamps, and speaker cables ... paulspencer Solid State 5 3rd August 2004 07:14 AM
signal tracing or other circuit checkout methods Zapped Pass Labs 7 12th September 2002 06:53 PM


New To Site? Need Help?

All times are GMT. The time now is 01:46 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright ©1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2