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Posted

I need to check for a few wire shorts in my house wiring and require a cable tone generator & probe to track the wiring behind some surface cement work. Does anyone know of a source for one of these kits - preferably cheap as I will not use often. As I live in the sticks in Surin a source that had a web page and would ship would be ideal but any info would be appreciated. Thanks for any help that can be provided.

Posted (edited)

A continuity tester...

a visual indicator unit, cheap, very easy to build (only 4 parts) ...

http://www.simple-el...transistor.html

- 1, 2 AA 1.5v battery holder

- 1, 9013 transistor

- 1, green LED

- 1, 15K ohm resistor

Kits for science projects can be found here,

perhaps in the educational section,

my son built one last year at school,

but I don't know where the teacher got them.

Only does audio.

It's simply a square cube (transistor+piezo)

and a 2xAA battery holder.

Inexpensive.

Google continuity tester.

And many multimeters have a continuity function...

Amorn or China Town...

Edited by howto
Posted (edited)

Thanks all for your input. I will check into the resources although it is disheartening to see 4000 baht plus when they sell inexpensive ones in the US for about $20.

howto - although a tone generator and probe is a continuity tester it allows you to do so without direct contact to the conductor on the probe side. This means you can find hidden breaks in continuity behind wall coverings. That way you don't have to rip out a whole wall to find a break. They are pretty nifty tools. See below if you want to see one in action. Thanks again all!

Edited by BuckarooBanzai
Posted

Oops... Buckaroo my apologies...

never dawned on me you were alluding to that device...

I used those extensively many years ago while at ATT and Sprint.

Back then they were very expensive, over usd 1000-

I'm amazed at the prices you mentioned, usd 20~

(even the Bt 4000 is a surprise)

I could certainly use one.

Could you please update this thread with the results of your quest?

Cheers.

Posted

Oops... Buckaroo my apologies...

never dawned on me you were alluding to that device...

I used those extensively many years ago while at ATT and Sprint.

Back then they were very expensive, over usd 1000-

I'm amazed at the prices you mentioned, usd 20~

(even the Bt 4000 is a surprise)

I could certainly use one.

Could you please update this thread with the results of your quest?

Cheers.

howto - It's interesting to do a search on Ebay where you will find a myriad of the devices at all different price levels.

The problem I have had is that those who ship worldwide add so much to the shipping cost and with the potential

import taxes etc. I have not bothered pursuing this. But it is an interesting search all the same to see what is available.

Will re-post if I find one locally at a good price.

Thanks again.

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