[NJARC] question regarding long wire antennas

[Chuck]

Hi Matt,
The lightning arrestor I have on my ham antenna works like the spark plugs on your car engine.
If you put enough current into it, it will short out over the gap to the ground side and ground out the source.
Lightning certainly has enough current to jump over the gap to ground --- So it works just like a spark plug.
I hope this helps.
See you at the next meeting...

Chuck
AC2DP


From: Matt Reynolds 
Sent: Friday, September 01, 2017 11:10 AM
To: Al Klase ; njarc at mailman.qth.net 
Subject: Re: [NJARC] question regarding long wire antennas

Just remember
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While we are on the subject, Can someone "explain like I'm five" how the lightning arrestor works?



You run a long wire in your backyard, all the way up to your window.  The arrestor has two terminals.  One goes to the long wire, the other goes to a wire you ran to earth ground.



Then what?  How does the antenna go into the radio then?  Capacitive coupling? or do you wire it into one of the terminals?



I get that the idea is to put a path into ground as direct as possible if the long wire is struck, but if you ran the wire directly to the long wire terminal what's to stop it from going both to ground and to the set?  I'm guessing you don't connect it to ground either.  If you connect it to ground is the gap capactively coupled?  



I'm sure this is relatively simple to many of you, but I'm not sure if I understand it correctly.



Matt



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From: njarc-bounces at mailman.qth.net <njarc-bounces at mailman.qth.net> on behalf of Al Klase <ark at ar88.net>
Sent: Friday, September 1, 2017 10:26:47 AM
To: njarc at mailman.qth.net
Subject: Re: [NJARC] question regarding long wire antennas 

Just remember
Reply = Poster
Reply All = Everyone

_________________________________________________________
Joe,

Mike is correct.  KISS = keep it simple, stupid!  You might also want to 
think about a lightning arrestor or grounding switch if the antenna is high.

Al

On 9/1/2017 9:08 AM, Mike Feher wrote:
> Just remember
> Reply = Poster
> Reply All = Everyone
>
> _________________________________________________________
> Joe -
>
> I suggest that you use the left over length as the feedline coming into the
> house and forget about coax. Unmatched coax can act like a big capacitor and
> ground all your incoming RF substantially. Regards - Mike
>
> Mike B. Feher, N4FS
> 89 Arnold Blvd.
> Howell NJ 07731
> 848-245-9115
>
> -----Original Message-----
> From: njarc-bounces at mailman.qth.net [mailto:njarc-bounces at mailman.qth.net]
> On Behalf Of Joe Giliberti
> Sent: Friday, September 1, 2017 8:44 AM
> To: New Jersey Antique Radio Club <njarc at mailman.qth.net>
> Subject: [NJARC] question regarding long wire antennas
>
> Just remember
> Reply = Poster
> Reply All = Everyone
>
> _________________________________________________________
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-- 
Al Klase – N3FRQ
Jersey City, NJ
http://www.skywaves.ar88.net/

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