Re: [TowerTalk] There's 'ground', and then there's 'ground'

[Gary Schafer <garyschafer@comcast.net>]

Well, If you turn that statement around to read the way I meant it..
"You do not have a good ground unless it is moist".

73
Gary  K4FMX

David Robbins K1TTT wrote:
> You can not 'require' moist ground for an adequate ground... in fact you
> usually have to design for the worst case and be sure you have a good enough
> ground even when the soil is dead dry.
>
>
> David Robbins K1TTT
> e-mail: mailto:k1ttt@arrl.net
> web: http://www.k1ttt.net
> AR-Cluster node: 145.69MHz or telnet://dxc.k1ttt.net
>  
>
>
> > -----Original Message-----
> > From: Gary Schafer [mailto:garyschafer@comcast.net]
> > Sent: Monday, January 17, 2005 17:14
> > To: David Robbins K1TTT
> > Cc: 'Alan NV8A (ex. AB2OS)'; 'towertalk reflector'
> > Subject: Re: [TowerTalk] There's 'ground', and then there's 'ground'
> >
> > Yes the main reason for keeping them away from the foundation is to keep
> > them in a more moist ground. The ground tends to be much dryer under the
> > eves of the house.
> >
> > Concrete is not a bad lightning conductor but the foundation wall of a
> > house with a basement will be rather dry.
> >
> > Lightning is in the range of DC to around 1 mhz so it is not high
> > frequency energy for the bulk of it although some of it does extend
> > higher. Moist ground is a requirement for a good lightning ground.
> >
> > 73
> > Gary  k4FMX
> >
> > David Robbins K1TTT wrote:
> >
> > > That is a convenient way to say 'keep them away from the foundation'...
> > > moisture helps for low frequency and low current grounding where ion
> > > conduction is the main conduction method, but does almost nothing for
> >
> > high
> >
> > > frequencies or lightning.
> > >
> > >
> > > David Robbins K1TTT
> > > e-mail: mailto:k1ttt@arrl.net
> > > web: http://www.k1ttt.net
> > > AR-Cluster node: 145.69MHz or telnet://dxc.k1ttt.net
> > >
> > >
> > >
> > >
> > > > -----Original Message-----
> > > > From: Alan NV8A (ex. AB2OS) [mailto:nv8a@att.net]
> > > > Sent: Monday, January 17, 2005 17:00
> > > > To: towertalk reflector
> > > > Cc: David Robbins K1TTT
> > > > Subject: Re: [TowerTalk] There's 'ground', and then there's 'ground'
> > > >
> > > > I have read that the ground rods should be out from the eaves,
> > > > presumably (my guess) because the ground there will stay moister.
> > > >
> > > > Alan NV8A
> > > >
> > > >
> > > > On 01/17/05 11:38 am David Robbins K1TTT tossed the following
> > > > ingredients into the ever-growing pot of cybersoup:
> > > >
> > > >
> > > >
> > > > > Depending on the spacing of the 2 existing rods you could reduce your
> > > >
> > > > ground
> > > >
> > > >
> > > > > impedance by 50% or more with 2 more rods.  Maybe a LOT more depending
> > > >
> > > > on
> > > >
> > > >
> > > > > the exact geometry of the situation.  Lots of people make a big mistake
> > > >
> > > > by
> > > >
> > > >
> > > > > driving a rod right next to the foundation, you should note that this
> > > > > reduces the effectiveness of the rod because half of the circle around
> > > >
> > > > it is
> > > >
> > > >
> > > > > cut off by the foundation forcing all the current to go in only one
> > > > > direction.
> > >
> > > _______________________________________________
> > >
> > > See: http://www.mscomputer.com  for "Self Supporting Towers", "Wireless
> >
> > Weather Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with
> > any questions and ask for Sherman, W2FLA.
> >
> > > _______________________________________________
> > > TowerTalk mailing list
> > > TowerTalk@contesting.com
> > > http://lists.contesting.com/mailman/listinfo/towertalk
>
>
> _______________________________________________
>
> See: http://www.mscomputer.com  for "Self Supporting Towers", "Wireless Weather Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with any questions and ask for Sherman, W2FLA.
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk



_______________________________________________

See: http://www.mscomputer.com  for "Self Supporting Towers", "Wireless Weather Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with any questions and ask for Sherman, W2FLA.

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