[NJARC] question regarding long wire antennas

[Al Klase]

Shudda been a picture.  (Ya just cant get good help!)



On 9/1/2017 4:58 PM, Al Klase wrote:
> Just remember
> Reply = Poster
> Reply All = Everyone
>
> _________________________________________________________
>
>
> Matt,
>
> The lead-in wire as well as the ground go to the radio.  The arrester, 
> hopefully, shunts most of a lightning strike to ground outside the 
> house.  Traditional arresters were typically simple air gaps, I'm 
> guessing in the neighborhood of 0.01 inch. Normally, the arrester is 
> an open circuit.
>
> For most of us, our antennas are lower than the nearby tree, 
> buildings, and power lines, so the chance of a direct strike is 
> minimal.  In this case, a simple arrester, and disconnecting the 
> radios, especially solid state things is sufficient.
>
> If your antenna is high and exposed, things get complicated.
>
> Al
>
> On 9/1/2017 11:10 AM, Matt Reynolds wrote:
>>
>> 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
>>
>> ------------------------------------------------------------------------
>> *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
>> >
>> > _________________________________________________________
>> >
>> > ______________________________________________________________
>> > NJARC mailing list
>> > Home: http://mailman.qth.net/mailman/listinfo/njarc
>> > Help: http://mailman.qth.net/mmfaq.htm
>> > Post: mailto:NJARC at mailman.qth.net
>> >
>> > This list hosted by: http://www.qsl.net
>> > Please help support this email list: http://www.qsl.net/donate.html
>>
>> -- 
>> Al Klase – N3FRQ
>> Jersey City, NJ
>> http://www.skywaves.ar88.net/
>>
>> ______________________________________________________________
>> NJARC mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/njarc
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:NJARC at mailman.qth.net
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>
> -- 
> Al Klase – N3FRQ
> Jersey City, NJ
> http://www.skywaves.ar88.net/
>
>
>
> ______________________________________________________________
> NJARC mailing list
> Home: http://mailman.qth.net/mailman/listinfo/njarc
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:NJARC at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html

-- 
Al Klase – N3FRQ
Jersey City, NJ
http://www.skywaves.ar88.net/

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/mailman/private/njarc/attachments/20170901/2802bd95/attachment-0001.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: hajkobfnpbimgcjo.png
Type: image/png
Size: 53953 bytes
Desc: not available
URL: <http://mailman.qth.net/mailman/private/njarc/attachments/20170901/2802bd95/attachment-0001.png>