ightning hits.
>>
>> Bob
>>
>> -Original Message-
>> 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 measur
uck 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 to the million volt wires he is
working on shows, what is important is that all the groun
hers!
Lee Mushel K9WRU
- Original Message -
From: "Chuck Harris"
To: "Discussion of precise time and frequency measurement"
Sent: Friday, April 13, 2012 7:14 AM
Subject: Re: [time-nuts] Thoughts on lightning protection measures
__
-Original Message-
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 po
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
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 ha
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,
Said
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 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 cable
On Thu, Apr 12, 2012 at 7:22 AM, Bob Camp 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 thread?
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 probabil
On Thu, 12 Apr 2012 09:20:37 -0700
Said Jackson 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 connected to "grou
ailto:time-nuts-boun...@febo.com] 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
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 T
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 ho
On Thu, 12 Apr 2012 17:39:57 +0300
MailLists 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 them.
A house is
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 low
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 includ
bo.com] 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,
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 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 strikes to dam
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)
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 di
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