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Old October 16th 08, 02:50 AM posted to rec.radio.amateur.antenna
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Default Locating underground conduit

Jerry wrote:

That's an excellent idea.... but I really hate water in my electrical
conduits.... I'll use that as a last resort. Thanks.

Ed



When in doubt, couple ways the Pros do it:

1) Run a Metalic Snake thru it, and hook to a (Low Power RF , or a
Fairly high power A.F. source-- follow the snake (above ground with
an inductive sampler ( or rf receiver)) to the end - use a cable
marker (Paint) to follow the duct if needed to find an intermediate
point , then repeat agan if necessary.

2) for those that have access to a "THUMPER", can do the same
Apply high level of sound to the PVC, and use a listening device
to follow the noise, in the ground.

Works for locating buried cables for utilities- should work for you!
Jim NN7K
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Old October 16th 08, 04:27 AM posted to rec.radio.amateur.antenna
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Default Locating underground conduit


"Jim-NN7K" . wrote in message
...
Jerry wrote:

That's an excellent idea.... but I really hate water in my electrical
conduits.... I'll use that as a last resort. Thanks.

Ed



When in doubt, couple ways the Pros do it:

1) Run a Metalic Snake thru it, and hook to a (Low Power RF , or a
Fairly high power A.F. source-- follow the snake (above ground with
an inductive sampler ( or rf receiver)) to the end - use a cable
marker (Paint) to follow the duct if needed to find an intermediate
point , then repeat agan if necessary.

2) for those that have access to a "THUMPER", can do the same
Apply high level of sound to the PVC, and use a listening device
to follow the noise, in the ground.

Works for locating buried cables for utilities- should work for you!
Jim NN7K


What an interesting thread!

How about one of those 'stage' smoke machines pumped into the open end?

VK5JE


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Old October 16th 08, 05:18 AM posted to rec.radio.amateur.antenna
Ed Ed is offline
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Default Locating underground conduit



How about one of those 'stage' smoke machines pumped into the open
end?

VK5JE



That's a good one, too, but in my case, I KNOW that I duct taped the
end of the conduit in such a manner that it is truly air tight... even
possibly under pressure. Thanks anyway.

Ed
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Old October 16th 08, 06:17 PM posted to rec.radio.amateur.antenna
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Default Locating underground conduit


"Ed" wrote in message
. 192.196...


How about one of those 'stage' smoke machines pumped into the open
end?

VK5JE



That's a good one, too, but in my case, I KNOW that I duct taped the
end of the conduit in such a manner that it is truly air tight... even
possibly under pressure. Thanks anyway.

Ed


Hi Ed

Will the taped end will not leak with 80 PSI air in the conduit?

Jerry KD6JDJ




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Old October 16th 08, 08:50 PM posted to rec.radio.amateur.antenna
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Default Locating underground conduit

On Thu, 16 Oct 2008 17:17:05 GMT, "Jerry"
wrote:

Will the taped end will not leak with 80 PSI air in the conduit?
Jerry KD6JDJ


Well, if it does leak, the sand above the duct tape will dribble down
into the 3/4" conduit creating a rather awkward clean up exercise.
That's why conduit runs usually terminate above the ground, not below.
The trick is to find the conduit end without blowing off the seal.

--
Jeff Liebermann
150 Felker St #D
http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558
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Old October 16th 08, 09:31 PM posted to rec.radio.amateur.antenna
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Default Locating underground conduit


"Jeff Liebermann" wrote in message
...
On Thu, 16 Oct 2008 17:17:05 GMT, "Jerry"
wrote:

Will the taped end will not leak with 80 PSI air in the conduit?
Jerry KD6JDJ


Well, if it does leak, the sand above the duct tape will dribble down
into the 3/4" conduit creating a rather awkward clean up exercise.
That's why conduit runs usually terminate above the ground, not below.
The trick is to find the conduit end without blowing off the seal.

--
Jeff Liebermann
150 Felker St #D
http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558


Hi Jeff

It may be of little interest to the OP, but the sand might have difficulty
leaking back into a conduit with air blowing out of it. In addition, the
air might leak from a small rupture below the oipen end of the conduit.
The OP may have no access to compressed air anyway.

Jerry KD6JDJ


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