Message-ID: <002101c47469$de0564a0$13bc0150@captbrian>
From: "captbrian" <captbrian@ukonline.co.uk>
To: rsgb_lf_group@blacksheep.org
References: <41067F3D.3229.595E2B@localhost> <000601c473f2$59f7abe0$6507a8c0@Main> <040b01c47403$f00ca160$4d540150@captbrian> <000901c47426$2b878ee0$6507a8c0@Main>
Date: Wed, 28 Jul 2004 07:12:30 +0100
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Subject: LF: Re: Re: Re: Re: Found earth rod source
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Thanks for that.
I am well aware that resistance at RF is different from that at DC BUT can
we assume (oops.... justifiably guess) that changes which reduce DC
resistance  to ground also reduce RF resistance to ground, ? I exclude
inductances obviously.

Bryan G3GVB
----- Original Message -----
From: Alan Melia <Alan.Melia@btinternet.com>
To: <rsgb_lf_group@blacksheep.org>
Sent: Tuesday, July 27, 2004 10:52 PM
Subject: LF: Re: Re: Re: Found earth rod source


> Hi Brian, Nothing, but Nothing, is undisputed unless you measure it at
your
> location at 136kHz !! Just coz it might work in my location doesnt mean it
> will definitely give the same effects for you. Make a little simple Bridge
> to measure R & C in series  <www.alan.melia.btinternet.co.uk/aelossbr.htm>
> measure an untuned wire. It doesnt have to be the final wire layout, but
> something close slung up with "rope insulators" .....they may not stand
any
> power but the will do to measure. You can then see what kind of
developments
> you need to get the resistance down. Lay the "radials on the lawn before
you
> bury them, and if it makes little difference, save the effort, unless of
> course you want to work 160m, 80m and 40m, in which case the effort will
> most probably pay off up there. You can connect one stake at a time and
then
> the lawn wires, the mains earth...see what makes the loss-resistance drop
> most. When you can't get any more with copper in the ground start
puttingit
> in the sky as top-load.  I have found you can't get by with guessing on
this
> topic.
>
> The water trick dont work when you have three strata of flints each about
> 4inches thick to drive through....its fine on the sandy bits bit but the
> pipe is then a bit "loose" and needs to have soil washed round it to bed
in.
> On a hole dug through the flints (abt 5 foot down) you dont even need
water
> here, just lean on the pipe and it goes straight in down to 3m...in pure
> yellow "building" sand. I am not sure that the stake has much effect in
the
> sand layer.....but as I said this one has not been measured yet.
>
> Cheers de Alan G3NYK
>
> ----- Original Message -----
> From: "captbrian" <captbrian@ukonline.co.uk>
> To: <rsgb_lf_group@blacksheep.org>
> Sent: 27 July 2004 19:02
> Subject: LF: Re: Re: Found earth rod source
>
>
> > Is it undisputed that 3 mtrs 20 mm cu straight down into your flinty
stuff
> > is significantly better than same buried horizontally under the lawn ?
> [says
> > he,  about to relay a lawn and looking at a coil of cu toob.....]
>
>
>
>