[Antennas] Coax questions

rbethman rbethman at comcast.net
Sat Aug 28 13:49:27 EDT 2010


  First, I'll say that I would NOT worry about "crowded".

There is information being asked for that is relevant to a fair sized 
number of members.

Now, to address the use of a metal detector.

Yes, if it is anything other than some $20 to $50 "junk" toy, any decent 
metal detector such as you speak of being used by beachcombers, will 
ABSOLUTELY be able to find the copper shield braid.  I have located a 
silver dollar coin buried about three feet deep.  I have also found the 
scrap trimmings from aluminum siding buried over half a foot down.

A "good" detector that I am referring to has two different modes.  It 
has an "ALL" metal mode, and it has a "DISCRIMINATOR" mode.  The latter 
mode will only indicate copper, brass, lead, silver, and gold materials 
items.  IOW, those things that are desirable.

We will use the ALL mode when sweeping a beach.  That is how we end up 
with items such as watches.  Not to mention rings, coins, and bracelets.

So try one in the property if you can get hold of one, or find someone 
with one to assist you.

They do take a "little" experience to be very effective.

Bob - N0DGN (Still making infrequent sweeps with one along the driveway 
and sidewalk - providing pocket change and a couple of sterling silver 
rings!)

On 8/28/2010 1:12 PM, Edward Dickinson, III wrote:
> -----Original Message-----
> From: antennas-bounces at mailman.qth.net
> [mailto:antennas-bounces at mailman.qth.net] On Behalf Of r miles
> Sent: Saturday, August 28, 2010 1:04 PM
> To: antennas; towertalk
> Subject: [Antennas] Coax questions
>
> I have a few towers scattered over 2 acres in the back yard. All have  coax
> runs buried in PVC. I'm planning another antenna out  amongst them. I have a
> general idea where all the runs are buried but not to the exact inch. I can
> just start digging  lightly to find the PVC but that's a long process. Is it
> possible to use a metal detector? Something like the beachcomers use.The PVC
> is about 4''-6''  below the surface. Frost line is not a problem in the Tn
> delta.  Has anyone used one to find coax?
> Is there more than BuryFlex on the market? I just want to consider what will
> be best. This will  be an HF run so no worry about VHF/UHF losses.
> Please contact me off reflector to make it less crowded.
> K9IL



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