I dont know of any local source to me that has strap at a reasonable cost,
they all have minimum orders. There used to be several scrap dealers that
let me poke around but they have all been turned into malls and condos. The
few remaining wont allow picking.
The 1/4" tubing is cheap enough at HD plus you can get fittings to extend
the lengths.
I suppose that even bare CATV hardline could be used if economy is
important. Ive had some scrap lengths out in the woods for almost 20 years
and except for staining it is still in fine shape.
Carl
KM1H
----- Original Message -----
From: "Russell Hill" <rustyhill@earthlink.net>
To: "Gary Schafer" <garyschafer@comcast.net>; "'jeremy-ca'"
<km1h@jeremy.mv.com>; <wc1m@msn.com>; <towertalk@contesting.com>
Sent: Friday, August 17, 2007 8:50 AM
Subject: Re: [TowerTalk] Ground System
> Is there a convenient sousrce for copper strap or copper plate?
>
> Home Depot has the copper tubing I reckon.
>
> Thanks,
> Rusty, na5tr
>
>
> ----- Original Message -----
> From: "Gary Schafer" <garyschafer@comcast.net>
> To: "'jeremy-ca'" <km1h@jeremy.mv.com>; <wc1m@msn.com>;
> <towertalk@contesting.com>
> Sent: Thursday, August 16, 2007 9:00 PM
> Subject: Re: [TowerTalk] Ground System
>
>
>> Copper strap is cheaper than tubing for a given amount of surface area
>> verses tubing. If I had a choice of where to run that extra copper I
>> would
>> run it in another direction from the tower and some from the single point
>> ground entrance panel, rather than in the same trench with the cables.
>> Make
>> radials.
>>
>> 73
>> Gary K4FMX
>>
>>> -----Original Message-----
>>> From: towertalk-bounces@contesting.com [mailto:towertalk-
>>> bounces@contesting.com] On Behalf Of jeremy-ca
>>> Sent: Thursday, August 16, 2007 8:45 PM
>>> To: Gary Schafer; wc1m@msn.com; towertalk@contesting.com
>>> Subject: Re: [TowerTalk] Ground System
>>>
>>> Would it help to run 1/4" copper tubing (as used for refrigerator ice
>>> makers) in the trench? Then bond that to several ground rods and also
>>> tape
>>> the coax to that tubing.
>>>
>>> Carl
>>> KM1H
>>>
>>>
>>>
>>> ----- Original Message -----
>>> From: "Gary Schafer" <garyschafer@comcast.net>
>>> To: <wc1m@msn.com>; <towertalk@contesting.com>
>>> Sent: Thursday, August 16, 2007 9:38 PM
>>> Subject: Re: [TowerTalk] Ground System
>>>
>>>
>>> >
>>> >
>>> >> -----Original Message-----
>>> >> From: towertalk-bounces@contesting.com [mailto:towertalk-
>>> >> bounces@contesting.com] On Behalf Of Dick Green WC1M
>>> >> Sent: Monday, August 13, 2007 10:32 PM
>>> >> To: 'K4SAV'; towertalk@contesting.com
>>> >> Subject: Re: [TowerTalk] Ground System
>>> >>
>>> >> > Coax shields won't take very much current before they melt. A large
>>> >> ground
>>> >> > wire will lower the impedance between the tower and the common
>>> >> > point
>>> >> > ground, as well as reduce the voltage drop for these low frequency
>>> >> > components.
>>> >>
>>> >> RG-8 style coax shields won't take much current before they melt, but
>>> as
>>> >> I
>>> >> mentioned, I have two runs of 1-5/8" heliax running between the tower
>>> and
>>> >> shack, connected to the tower ground system at one end and the SPG at
>>> the
>>> >> other end. For those not familiar with this type of cable, the outer
>>> >> conductor of each run is nearly 2" in diameter -- basically a big,
>>> >> flexible
>>> >> copper pipe with a lot of surface area. I don't have a spec on the
>>> >> thickness
>>> >> of the copper, but it's probably on the order of 1/64". The
>>> >> resistance
>>> >> per
>>> >> foot is .14 ohm/1000 feet. I don't know the current handling
>>> >> capacity,
>>> >> but
>>> >> the power rating is 310 KW. Although the heliax is jacketed, and
>>> >> therefore
>>> >> won't conduct a surge to ground like a bare wire in the trench, it
>>> seems
>>> >> to
>>> >> me that the two large copper tubes present a much more inviting path
>>> >> to
>>> >> the
>>> >> SPG than the bare wire. True or false?
>>> >>
>>> >> 73, Dick WC1M
>>> >>
>>> >
>>> > There will be a great amount of capacitive coupling to ground provided
>>> by
>>> > those long cables even being insulated. A great deal of lightning
>>> > energy
>>> > is
>>> > connected to earth by capacitance in any ground system. Yes a DC (bare
>>> > wire)
>>> > connection would be better and help more with the low frequency energy
>>> > coupling.
>>> >
>>> > 73
>>> > Gary K4FMX
>>> >
>>> >
>>> > _______________________________________________
>>> >
>>> >
>>> >
>>> > _______________________________________________
>>> > TowerTalk mailing list
>>> > TowerTalk@contesting.com
>>> > http://lists.contesting.com/mailman/listinfo/towertalk
>>> >
>>>
>>> _______________________________________________
>>>
>>>
>>>
>>> _______________________________________________
>>> TowerTalk mailing list
>>> TowerTalk@contesting.com
>>> http://lists.contesting.com/mailman/listinfo/towertalk
>>
>>
>> _______________________________________________
>>
>>
>>
>> _______________________________________________
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>> http://lists.contesting.com/mailman/listinfo/towertalk
>>
>
>
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