To: | <[email protected]> |
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Subject: | Re: Re[2]: LF: Ground |
From: | "Alan Melia" <[email protected]> |
Date: | Tue, 22 Sep 2015 22:26:40 +0100 |
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As to getting good contact between the rod and the ground is important.....
mild steel rusting is likely to give poor and non-linear contact.
Copper-clad steel is probably the best bet for hammering in. I have used
copper water pipe or scrap CH piping. My method was to drive external steel
(external) electrical conduit with rough teeth cut on the bottom. It was
necessary to use a tripod and block to pull it out ! and then replace it
with water pipe (which was a lot cheaper 10 years ago !)
In some instances salt has been used to improve contact to the soil, but it is not very "garden friendly" but gypsum available as a soil improver from garden centres is almost as good. It disolves more slowly and doesn't poison the soil. The disolved gypsum spreads out into the soil effecively increasing the area of the contact. Alan G3NYK----- Original Message ----- From: "Chris Wilson" <[email protected]> To: <[email protected]> Sent: Tuesday, September 22, 2015 7:49 PM Subject: Re[2]: LF: Ground Hello Mike, Tuesday, September 22, 2015Marcin,My experience is that a few earth rods work much better than electrically short radials on 136kHz.But when I operate on 160m, radials are much better than the earth rods.My soil is 1m of clay over chalk.Mike, G3XDV ===========Out here in the sticks I used to buy 2 meter long heavy galvanised angle iron ground stakes from the electric fencing people, but today I found they have gone up to £28 plus VAT (20%) each! I bought 3 off 35mm OD 3mm wall thickness tubular hand rails, each 3.5 meters long, off Ebay for £54 delivered, and these will make 6 good ground rods, I hope. I did consider 22mm copper water pipe, but the moderns stuff is so soft and thin walled I worried about getting them in, I can't realistically run a water hose to some places I want to put them in, to try the pressurised water down them, to erode the soil away, and digging down say 4 feet is messy as I would at best have a hole 18 inches square, and possibly bigger if the soil started to collapse. The tractor on the lawn with the post hole borer is a definite no no, the wife would skin me alive if I left wheel ruts! Anyone know how much better galvanised "clean" rods are compared to uncoated mild steel, that will rust in weeks? -- Best regards, Chris mailto:[email protected] |
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