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lan tracer

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nuckolls.bob(at)aeroelect
Guest

Posted: Wed Jan 26, 2011 8:47 pm Post subject: lan tracer

At 10:01 PM 1/26/2011, you wrote:

  	  Quote: 	
		  hi all,

  anyone have any experience with a wire tracer that they can recommend one? under $ 60 i hope.

           bob noffs 	


  How about these?



  http://tinyurl.com/49bj2pa 



  http://tinyurl.com/4hnlvvh 



 

   Bob . . .    [quote][b]

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icubob(at)gmail.com
Guest

Posted: Thu Jan 27, 2011 5:02 am Post subject: lan tracer

thanks bob,

   anyone have a tracer they can recommend? one of the trackers on this wedsite is the one i bought [one with long black antenna] from harbour freight. purely worthless. when i called the tech guy to make arrangements to ship it back he ''checked something'' then came back on the phone and said just toss it and he would give me credit. on my card.  also, the gb i have been looking at is on one of these sites at a great price but i have read that it works and that it doesn't. any feedback from a trusted  aerolectric follower would be appreciated.

   bob noffs

 On Wed, Jan 26, 2011 at 9:42 PM, Robert L. Nuckolls, III <nuckolls.bob(at)aeroelectric.com (nuckolls.bob(at)aeroelectric.com)> wrote:

 [quote]  At 10:01 PM 1/26/2011, you wrote:

  	  Quote: 	
		  hi all,

 anyone have any experience with a wire tracer that they can recommend one? under $ 60 i hope.

          bob noffs 	




 How about these?



http://tinyurl.com/49bj2pa 

 

http://tinyurl.com/4hnlvvh 



 

  Bob . . .   	  Quote: 	
		  



ist" target="_blank">http://www.matronics.com/Navigator?AeroElectric-List

ttp://forums.matronics.com

_blank">http://www.matronics.com/contribution



	


 



[b]

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nuckolls.bob(at)aeroelect
Guest

Posted: Thu Jan 27, 2011 7:12 am Post subject: lan tracer

At 07:57 AM 1/27/2011, you wrote:

 	  Quote: 	
		  thanks bob,

   anyone have a tracer they can recommend? one of the trackers on 

 this wedsite is the one i bought [one with long black antenna] from 

 harbour freight. purely worthless. when i called the tech guy to 

 make arrangements to ship it back he ''checked something'' then 

 came back on the phone and said just toss it and he would give me 

 credit. on my card.  also, the gb i have been looking at is on one 

 of these sites at a great price but i have read that it works and 

 that it doesn't.


	


   You could build one. They function based on the

   simple-ideas that drive the occasional need for

   shielded wire. Electro-Static Coupling.



   The 'transmitter' is usually a two-transistor

   multi-vibrator or perhaps an IC audio amplifier

   set up as an oscillator. The goal is to generate

   a square-wave at about 400-1000 hz that has

   VERY fast rise and fall times. In other words,

   very high harmonic content. A 9v battery, two

   transistors, 4 resistors and 4 capacitors would

   do the trick.



   The receiver is nothing more than a high gain

   audio amplifier with a capacitive probe . . .

   a metallic tip that can be placed in close

   proximity to the wire ends being explored

   for 'continuity'.



   Capacitive coupling through the insulation

   of the excited wire will come across as the

   400-1000 Hz audio note. In fact, your probe is

   really detecting the much higher frequency

   harmonics that couple across the insulation

   modulated at the audio rate.



   Failure to function for any such product can

   be a combination of factors. Edges of the

   square wave are too slow. Amplifier in probe

   is too low in gain. Receiver electronics poorly

   shielded for the effects of other noises not

   impressed through the probe.



   These things appear really easy to make work

   and they are. But it's a bit like learning

   to make biscuits. Just having the ingredients

   and a rough notion of how they go together

   is not a recipe for success. There are

   subtle but critical design goals to be

   met.



   I've seen some chatter on the DIY sites

   suggesting that a transistor AM pocket radio

   can be jeeped into a really good detector.

   The transistor oscillator isn't a big deal

   either.

   Bob . . .

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jonlaury

Joined: 06 Nov 2006
Posts: 336

Posted: Fri Jan 28, 2011 8:39 am Post subject: Re: lan tracer

Try www.allelectroincs.com , cat#28, $12

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Bob McC

Joined: 09 Jan 2006
Posts: 258
Location: Toronto, ON

Posted: Fri Jan 28, 2011 10:41 am Post subject: lan tracer

John;



Check the link you posted. It leads to a website phishing for cell phone

numbers.



I suspect that when you wrote "allelectroincs" you might have meant

"allelectronics", but catalogue #28 does not appear to exist on their

website and all of their part numbers appear to consist of an alpha prefix

followed by a dash and then a number. There do not appear to be any numbers

fitting your posting.



Please clarify.



Bob McC



[quote] --

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_________________
Bob McC
Falco #908
(just starting)

jonlaury

Joined: 06 Nov 2006
Posts: 336

Posted: Sat Jan 29, 2011 8:08 am Post subject: Re: lan tracer

 	  Quote: 	
		  	

PostPosted: Fri Jan 28, 2011 10:41 am    Post subject: lan tracer

John;



Check the link you posted. It leads to a website phishing for cell phone

numbers. 	




Bob,

After fixing my typo "allelectroIncs",  http://www.allelectronics.com/ pops the website right up for me. Sorry about the Part #... should have been CT-28. I put it in the search box and it goes right to it ready to buy and check out.



Do not Archive

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Bob McC

Joined: 09 Jan 2006
Posts: 258
Location: Toronto, ON

Posted: Sat Jan 29, 2011 8:55 am Post subject: lan tracer

Thanks John;



The missing "CT" was the last part of the puzzle. The URL typo was fairly

easy to surmise.



Bob McC



Do not archive



[quote] --

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_________________
Bob McC
Falco #908
(just starting)

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