Re: How to locate 22/4 jacketed buried in wall.

["ABLE_1" <royboynospam@xxxxxxxxxxxxx>]

UPDATE!!

I had an issue today that required me to redo my blown rig.  Then I realized
that I had a 10 ohm wirewound load resistor across the leads at the output
of the siren driver that I forgot to mention previously.  I was using a
driver board from a dead flush mount ATW siren.  Driver was good but the
speaker was dead.  It is the long skinny board that is mounted on the grill.

Again make sure the wire you are looking for is not shorted before hooking
up.

If you have the time and want to experiment a bit try this.

I used one of these.
http://www.radioshack.com/product/index.jsp?productId=2062291&cp=2032058.2032230.2032267&parentPage=family

Depending upon the siren driver try putting two of the above in parallel.
It will give 5 ohm load.  It should make for a stronger output thus a
greater distance or range.  May not be necessary but it would depend on your
challenge.

Today my challenge was to find a open cavity from the 2nd floor to the a
basement crawl space.  I took a box of 22/2 and stripped the end of the
wire.  Taped back one lead and stripped the insulation off the other about
3" worth.  Used a 1" spade bit as a weight and looped the bare wire thru the
hole in the spade bit, this would make a bigger target.  Taped it off and
dropped the bit into the open cavity.  Then connected my new tool at the box
tab end of the wire coil.  Went to the basement with my probe and the tone
was audible in a 12" - 14" area with a very loud sweet spot.  Job done!!!

Hope this helps someone in a jamb.

Good luck and someone let me know how the 4 or 5 ohm resistor works.

Later,

Les




> A small warning.  Make sure that the wire is open before connecting the
> driver and walking to the other end to find the buried wire.  Because if
> you don't you will not be ABLE to find the tone.  This will be due to the
> driver smoking a bit.
>
> I have to rebuild mine because of this little whoops.  I think the next
> one will have a 10ohm load resistor built in, but I don't know how much
> that will decrease the output.  Must experiment a little on this.
>
> So all should be aware before actually making MY type of tone generator.
>
> Good luck and have a good weekend.
>
> Les
>
>
>
> "Bob La Londe" <nospam@xxxxxxxxx> wrote in message
> news:47613d47$0$26041$88260bb3@xxxxxxxxxxxxxxxxxxxx
>>>
>>> Step Five  --  If it can't be located because it is too deep then take
>>> any siren driver connect to other end of wire add battery and use above
>>> probe to locate.  It will be very very loud and much easier to find.
>>
>>
>> I like #5.  I may just make up a small project box unit for this sort of
>> thing.  Great idea to put a "high power" tone generator on the line.  It
>> would probably work as the signal source for a underground cable too.
>> Set it up with a switch to select solid tone or warble tone.  Now to test
>> battery life and see how small a (battery/battery set) would actually be
>> useful for this.
>>
>>
>> --
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>
>