And if you are planning to put up towers for lightning protection, make sure
the tops are blunt rather than pointed… ole Ben lost the bet with King George
III.
Cheers,
James Forsman - K7BIE
jamesforsman@me.com
https://jrquark.smugmug.com/HamRadio
On Sep 7, 2019, at 2:03 PM, Richard Smith <n6kt1@sbcglobal.net> wrote:
I visited the launch base at Kourou, French Guiana, a few years ago. They have
4 towers around the rocket at the launch site, for lightning protection.
Overkill for a ham station, but maybe there is an idea there.
Ariane 5 rocket arrives at launch pad with two TV broadcast satellites –
Spaceflight Now
|
|
|
| | |
|
|
|
| |
Ariane 5 rocket arrives at launch pad with two TV broadcast satellites –...
|
|
|
73, Rich, N6KT
On Saturday, September 7, 2019, 10:38:21 AM PDT, Grant Saviers
<grants2@pacbell.net> wrote:
Isn't that done in high voltage switchgear centers? I see lots of tall
poles with spikes on top.
Also google "oil field lightning protection"
One of my EE professors supposedly got very rich doing this during Texas
wildcatting days.
Grant KZ1W
On 9/7/2019 8:39 AM, Richard Smith wrote:
> Is there any value in the idea to put up some kind of structure, fairly far
> away from your antennas, and design it so that it has a better lightning path
> to ground than your towers and antennas??? Could it draw lightning strikes
> away from your towers and antennas?
> Trying to think outside the box...
> 73, Rich, N6KT
> On Thursday, September 5, 2019, 06:43:27 AM PDT, john@kk9a.com
> <john@kk9a.com> wrote:
>
> Lightning is very good at finding a path to ground. make it a more
> desirable one.
>
> John KK9A
> Sent via the Samsung Galaxy 7 edge, an AT&T 4G LTE smartphone.
>
>
> On Thu, Sep 5, 2019 at 9:37 AM Chuck Dietz <w5prchuck@gmail.com> wrote:
>
>> I had everything disconnected but the ground and a clock on top of an amp.
>> Lightning surge came through the power lines, through the clock and in to
>> the amp on its way to ground.
>> Now I disconnect the ground.
>>
>> Chuck W5PR
>>
>> On Thu, Sep 5, 2019 at 8:01 AM <john@kk9a.com> wrote:
>>
>>> What ground??? Do you use a seperate ground going from your radio
>>> chassis to a ground rod? I have my equipment bonded together but no RF
>>> ground and no RFI issues.
>>>
>>> John?? KK9A/4
>>>
>>>
>>> K9MA wrote:
>>>
>>>
>>> My theory has always been that, with the station equipment well bonded
>>> together, it is safe to leave the ground connected, as long as
>>> EVERYTHING else is disconnected. That leaves no path for current to flow
>>> through anything. I can disconnect the transmitting antennas with one
>>> coax, all the control cables and rx antennas with another big connector,
>>> and power with one 120 and one 240 V plug. That just leaves the ethernet
>>> cable, which I try not to forget.
>>>
>>> In any case, my primary goal is to prevent a fire, and disconnecting the
>>> ground from the equipment probably wouldn't help there. I hope I never
>>> have to test that theory.
>>>
>>> 73,
>>>
>>> Scott K9MA
>>>
>>> _______________________________________________
>>>
>>>
>>>
>>> _______________________________________________
>>> TowerTalk mailing list
>>> TowerTalk@contesting.com
>>> http://lists.contesting.com/mailman/listinfo/towertalk
>>>
>>
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|