Moin,
On Thu, 12 Apr 2012 18:28:24 -0400 (EDT)
saidj...@aol.com wrote:
if I remember correctly, the issue is that the ground at the house is
not a real ground when the earth is frozen, as the resistance of frozen
earth goes up substantially over non-frozen earth. So it's like not having
As the power line worker strapped to the million volt wires he is
working on shows, what is important is that all the grounds in the
house stay at the same potential... not that they stay at some
perfect earth ground potential.
It really doesn't matter if a house ground jumps up many
thousands
-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Chuck Harris
Sent: Friday, April 13, 2012 9:14 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Thoughts on lightning protection measures
As the power line worker strapped
...@erols.com
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Sent: Friday, April 13, 2012 7:14 AM
Subject: Re: [time-nuts] Thoughts on lightning protection measures
___
time-nuts mailing list -- time-nuts@febo.com
: Friday, April 13, 2012 9:14 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Thoughts on lightning protection measures
As the power line worker strapped to the million volt wires he is
working on shows, what is important is that all the grounds in the
house stay
: Friday, April 13, 2012 9:14 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Thoughts on lightning protection measures
As the power line worker strapped to the million volt wires he is
working on shows, what is important is that all the grounds
Time-nutters--
Around here (N. Central Flori-DUH) it is not uncommon for
near-by lightning strikes to damage underground cables and
wiring. This is why buried wiring to things like driveway
gate-openers are often placed in conduit rather than done
with direct-burial wiring so that if lightning
On 4/12/12 6:22 AM, Michael Baker wrote:
Time-nutters--
Around here (N. Central Flori-DUH) it is not uncommon for
near-by lightning strikes to damage underground cables and
wiring. This is why buried wiring to things like driveway
gate-openers are often placed in conduit rather than done
with
True if you do not include the cost of the burned down house which is a
possibility.
Bert Kehren
In a message dated 4/12/2012 9:59:08 A.M. Eastern Daylight Time,
jim...@earthlink.net writes:
On 4/12/12 6:22 AM, Michael Baker wrote:
Time-nutters--
Around here (N. Central Flori-DUH) it
I have 2 TBolts but now I'm thinking to buy others to save them from the
sacrifice...
On Thu, Apr 12, 2012 at 3:58 PM, Jim Lux jim...@earthlink.net wrote:
On 4/12/12 6:22 AM, Michael Baker wrote:
Time-nutters--
Around here (N. Central Flori-DUH) it is not uncommon for
near-by lightning
] On
Behalf Of Azelio Boriani
Sent: Thursday, April 12, 2012 10:04 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Thoughts on lightning protection measures
I have 2 TBolts but now I'm thinking to buy others to save them from the
sacrifice...
On Thu, Apr 12, 2012
Only if it's not part of the sacrificial ritual...
On the more serious part, while the lightning processes, and effects are
scientifically researched for ages, an efficient lighting protection
still borders black magic.
On 4/12/2012 5:01 PM, ewkeh...@aol.com wrote:
True if you do not
A very efficient solution would be to get the signal/power conducting
cables out of the lightning path - that means a GPS receiver near the
antenna, with a local power supply (photo cell panels / buffer
accumulator) and signal transmission over optical fiber. Quite feasible,
as a GPS Rx has
On Thu, 12 Apr 2012 17:39:57 +0300
MailLists li...@medesign.ro wrote:
Regarding the TBs, even if they are the only ones directly connected to
the antenna, the cable is already punching through the house Faraday
cage, and chances are quite high that the lightning discharge won't stop
at
You're right, but it's highly depending on the used construction
materials... The building I live in, is quite like a Faraday cage -
reinforced concrete. Even higher frequency radio signals have a tough
time entering, mostly through the windows.
What I wanted to underline is that, even if the
One interesting fact: frozen ground is a bad conductor.
The ground potential around your house may go up many 1000s of volts even with
just a proximity strike, while the power feed stays down, blowing up anything
connected to ground. Thus the special Nordig surge protection requirements
for TV
] On
Behalf Of MailLists
Sent: Thursday, April 12, 2012 11:22 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Thoughts on lightning protection measures
You're right, but it's highly depending on the used construction
materials... The building I live
On Thu, 12 Apr 2012 09:20:37 -0700
Said Jackson saidj...@aol.com wrote:
One interesting fact: frozen ground is a bad conductor.
The ground potential around your house may go up many 1000s of volts
even with just a proximity strike, while the power feed stays down,
blowing up anything
Fortunately, it seems that lightning is not as frequent in high
northern and southern latitudes as is in tropical regions.
I was told about a story of a group of Swedish scientists
involved in thunderstorm studies, having built a little lab
in the village with the best reputation of high
On Thu, Apr 12, 2012 at 7:22 AM, Bob Camp li...@rtty.us wrote:
Hi
Is your house hit multiple times per year now? If so, I'd suggest that's the
issue that needs to be solved. If not, then mount the antenna lower than the
peak of the house and move on.
Did you not read the first post in this
Hi Attila,
if I remember correctly, the issue is that the ground at the house is
not a real ground when the earth is frozen, as the resistance of frozen
earth goes up substantially over non-frozen earth. So it's like not having
grounded the wires at all.
This is a real issue for cables
Said,
The ground is a decent thermal isolator. And will in nordic countries not
often go deeper than about 1 meter. You need to build your houses
foundation deep enough to stand on non frozen ground. Otherwise your
house will move to much with the seasons and likely break. It is not that
hard to
Hi Bjoern,
Possibly, I am just reciting what I read in the Nordig requirements a
looong time ago. Maybe they are worried about far north permafrost scenarios
that go deeper? The requirements for receiver RF input surge protection were
much higher than the usual US requirements..
bye,
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