OT - anyone have experience with effects of metal roofs on antenna performace?
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Re: OT - anyone have experience with effects of metal roofs on antenna performace?
 
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On 2013-07-05 22:22, Brian Alsop wrote:
> SWR is a pretty coarse indication of interaction. Interactions can > change directional antenna F/B and F/S ratio by 6-10 db easily (assuming > you have it in the first place) and hardly affect SWR. > > At least, this is my experience from antenna modeling. > > However, we have to live with the hands we're dealt. Without any field > strength measurements or calculations, one probably won't detect much. > Ignorance is bliss. > > 73 de Brian/K3KO > antenna due to interaction with another antenna or "object" and see no nothing on the SWR you measure down in the shack. Then you think everything is fine a perfect, well maybe it´s good since what you don´t know you don´t worry about. /SM2EKM ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
Re: OT - anyone have experience with effects of metalroofs on antenna performace?
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In reply to this post by Paul Chebi
And Phil, they did not teach me the most important thing.......how to solder a PL 259
George, W6GF ----- Original Message ----- From: Paul Chebi <[hidden email]> To: Phil Shepard <[hidden email]> Cc: "[hidden email]" <[hidden email]> Sent: Friday, July 5, 2013 9:13 PM Subject: Re: [Elecraft] OT - anyone have experience with effects of metalroofs on antenna performace? This note is for the log/web manager. I note that each time somebody comments on a thread ( the recent ones on metal roof), a new email is sent to all recipients. This is a nuisance cluttering the inbox. My experience with blogs is all comments are retained on the server Under one heading, and an email is sent daily to anybody interested in that subject upon request. Hope something could be done about that. Paul Chebi Kk4ptv Sent from my iPhone On Jul 5, 2013, at 6:46 PM, Phil Shepard <[hidden email]> wrote: > Ah, memories … I took an antenna class from Balanis, and we used photo copies of his fledgling book, acting as proofers. He was my senior EE project advisor as well. Quite a character. I wish I still remembered a fraction of what I knew then. Hi hi. > > Phil, NS7P > > On Jul 5, 2013, at 3:11 PM, kevinr <[hidden email]> wrote: > >> I was just reviewing my copy of Balanis and remembered the grueling effort of the class. I took it in grad school with a crazy Greek professor who worked with Balanis. He wound up being my thesis advisor :) >> Kevin. KD5ONS >> >> >> >> On 7/5/2013 1:54 PM, george fritkin wrote: >>> I remember the toughest class was antenna theory. As an undergrad EE student, I believed that this class would kill my plan to be an EE. I got a 25 (out of 100)! No bragging, it was the highest grade. They graded on a curve. My prof was a world renown antenna expert. He liked to &@#* with us. So if anyone figures out this antenna stuff email me >>> ______________________________________________________________ >>> Elecraft mailing list >>> Home: http://mailman.qth.net/mailman/listinfo/elecraft >>> Help: http://mailman.qth.net/mmfaq.htm >>> Post: mailto:[hidden email] >>> >>> This list hosted by: http://www.qsl.net >>> Please help support this email list: http://www.qsl.net/donate.html >> >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[hidden email] >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
Re: OT - anyone have experience with effects of metalroofs on antenna performace?
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In reply to this post by Paul Chebi
Paul,
That option is totally up to you. Go to the home page whose link is shown on the bottom of the post and set up the way you want. 73, Mike NF4L On Jul 6, 2013, at 12:13 AM, Paul Chebi <[hidden email]> wrote: > This note is for the log/web manager. > > I note that each time somebody comments on a thread ( the recent ones on metal roof), a new email is sent to all recipients. This is a nuisance cluttering the inbox. > My experience with blogs is all comments are retained on the server Under one heading, and an email is sent daily to anybody interested in that subject upon request. > Hope something could be done about that. > > Paul Chebi > Kk4ptv > > Sent from my iPhone > > On Jul 5, 2013, at 6:46 PM, Phil Shepard <[hidden email]> wrote: > >> Ah, memories … I took an antenna class from Balanis, and we used photo copies of his fledgling book, acting as proofers. He was my senior EE project advisor as well. Quite a character. I wish I still remembered a fraction of what I knew then. Hi hi. >> >> Phil, NS7P >> >> On Jul 5, 2013, at 3:11 PM, kevinr <[hidden email]> wrote: >> >>> I was just reviewing my copy of Balanis and remembered the grueling effort of the class. I took it in grad school with a crazy Greek professor who worked with Balanis. He wound up being my thesis advisor :) >>> Kevin. KD5ONS >>> >>> >>> >>> On 7/5/2013 1:54 PM, george fritkin wrote: >>>> I remember the toughest class was antenna theory. As an undergrad EE student, I believed that this class would kill my plan to be an EE. I got a 25 (out of 100)! No bragging, it was the highest grade. They graded on a curve. My prof was a world renown antenna expert. He liked to &@#* with us. So if anyone figures out this antenna stuff email me >>>> ______________________________________________________________ >>>> Elecraft mailing list >>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft >>>> Help: http://mailman.qth.net/mmfaq.htm >>>> Post: mailto:[hidden email] >>>> >>>> This list hosted by: http://www.qsl.net >>>> Please help support this email list: http://www.qsl.net/donate.html >>> >>> ______________________________________________________________ >>> Elecraft mailing list >>> Home: http://mailman.qth.net/mailman/listinfo/elecraft >>> Help: http://mailman.qth.net/mmfaq.htm >>> Post: mailto:[hidden email] >>> >>> This list hosted by: http://www.qsl.net >>> Please help support this email list: http://www.qsl.net/donate.html >> >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[hidden email] >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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In reply to this post by george fritkin
The secret to that is to get a big-honking-old-fashioned soldering iron to solder with. I have one that AT&T issued my FIL is about 1938 that works great. I had to change the cord to a modern one to keep from electrocuting myself or someone else.
Willis 'Cookie' Cooke K5EWJ & Trustee N5BPS, USS Cavalla, USS Stewart ________________________________ From: george fritkin <[hidden email]> To: El <[hidden email]> Sent: Saturday, July 6, 2013 2:48 AM Subject: Re: [Elecraft] OT - anyone have experience with effects of metalroofs on antenna performace? And Phil, they did not teach me the most important thing.......how to solder a PL 259 George, W6GF ----- Original Message ----- From: Paul Chebi <[hidden email]> To: Phil Shepard <[hidden email]> Cc: "[hidden email]" <[hidden email]> Sent: Friday, July 5, 2013 9:13 PM Subject: Re: [Elecraft] OT - anyone have experience with effects of metalroofs on antenna performace? This note is for the log/web manager. I note that each time somebody comments on a thread ( the recent ones on metal roof), a new email is sent to all recipients. This is a nuisance cluttering the inbox. My experience with blogs is all comments are retained on the server Under one heading, and an email is sent daily to anybody interested in that subject upon request. Hope something could be done about that. Paul Chebi Kk4ptv Sent from my iPhone On Jul 5, 2013, at 6:46 PM, Phil Shepard <[hidden email]> wrote: > Ah, memories … I took an antenna class from Balanis, and we used photo copies of his fledgling book, acting as proofers. He was my senior EE project advisor as well. Quite a character. I wish I still remembered a fraction of what I knew then. Hi hi. > > Phil, NS7P > > On Jul 5, 2013, at 3:11 PM, kevinr <[hidden email]> wrote: > >> I was just reviewing my copy of Balanis and remembered the grueling effort of the class. I took it in grad school with a crazy Greek professor who worked with Balanis. He wound up being my thesis advisor :) >> Kevin. KD5ONS >> >> >> >> On 7/5/2013 1:54 PM, george fritkin wrote: >>> I remember the toughest class was antenna theory. As an undergrad EE student, I believed that this class would kill my plan to be an EE. I got a 25 (out of 100)! No bragging, it was the highest grade. They graded on a curve. My prof was a world renown antenna expert. He liked to &@#* with us. So if anyone figures out this antenna stuff email me >>> ______________________________________________________________ >>> Elecraft mailing list >>> Home: http://mailman.qth.net/mailman/listinfo/elecraft >>> Help: http://mailman.qth.net/mmfaq.htm >>> Post: mailto:[hidden email] >>> >>> This list hosted by: http://www.qsl.net >>> Please help support this email list: http://www.qsl.net/donate.html >> >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[hidden email] >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
Re: OT - anyone have experience with effects of metal roofs on antenna performace?
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In reply to this post by Jan Erik Holm-2
A 4 square can be badly affected by metal (towers, masts, metal roofs). The
gain is similar but it loses front to back ratio in the affected direction. David G3UNA > You forgot the Gain. Forexample you can loose 2 - 3 dB gain on an antenna due to interaction with another antenna or "object" and see no nothing on the SWR you measure down in the shack. Then you think everything is fine a perfect, well maybe it´s good since what you don´t know you don´t worry about. /SM2EKM ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
Re: OT - anyone have experience with effects of metalroofs on antenna performace?
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In reply to this post by Paul Chebi
This is a mailing list. The whole point of a mailing list is to forward
email responses to previous posts. So, in a way, it is designed to "clutter" your inbox. You have options in the way the list sends messages to you here: http://mailman.qth.net/mailman/listinfo/elecraft But understand, this list is inherently different than a "blog" and the point of the list is to disseminate information to participants. Thus, there is going to be significantly more traffic than you're used to and inbox "clutter" is part of the bargain. 73, Scott, N9AA On 7/6/13 12:13 AM, Paul Chebi wrote: > This note is for the log/web manager. > > I note that each time somebody comments on a thread ( the recent ones on metal roof), a new email is sent to all recipients. This is a nuisance cluttering the inbox. > My experience with blogs is all comments are retained on the server Under one heading, and an email is sent daily to anybody interested in that subject upon request. > Hope something could be done about that. > > Paul Chebi > Kk4ptv > > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
Re: OT - anyone have experience with effects of metalroofs on antenna performace?
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In reply to this post by kevinr@coho.net
And that's why they invented the "delete" key.
Have a great day, Dale - WC7S -----Original Message----- From: Scott Manthe <[hidden email]> Date: Sat, 6 Jul 2013 16:43:54 To: <[hidden email]> Subject: Re: [Elecraft] OT - anyone have experience with effects of metalroofs on antenna performace? This is a mailing list. The whole point of a mailing list is to forward email responses to previous posts. So, in a way, it is designed to "clutter" your inbox. You have options in the way the list sends messages to you here: http://mailman.qth.net/mailman/listinfo/elecraft But understand, this list is inherently different than a "blog" and the point of the list is to disseminate information to participants. Thus, there is going to be significantly more traffic than you're used to and inbox "clutter" is part of the bargain. 73, Scott, N9AA On 7/6/13 12:13 AM, Paul Chebi wrote: > This note is for the log/web manager. > > I note that each time somebody comments on a thread ( the recent ones on metal roof), a new email is sent to all recipients. This is a nuisance cluttering the inbox. > My experience with blogs is all comments are retained on the server Under one heading, and an email is sent daily to anybody interested in that subject upon request. > Hope something could be done about that. > > Paul Chebi > Kk4ptv > > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
Re: OT - anyone have experience with effects of metalroofs on antenna performace?
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See elecraft.com/elist.html for alternative list viewing pages. (Both nabble and mail-archive can view our posts sorted by subject etc.)
In the interest of keeping list volume and SNR under control, let's end this thread at this time. 73, Eric List Manager elecraft.com _..._ On Jul 6, 2013, at 7:03 PM, "Dale Putnam " <[hidden email]> wrote: > And that's why they invented the "delete" key. > Have a great day, > Dale - WC7S > > -----Original Message----- > From: Scott Manthe <[hidden email]> > Date: Sat, 6 Jul 2013 16:43:54 > To: <[hidden email]> > Subject: Re: [Elecraft] OT - anyone have experience with effects of > metalroofs on antenna performace? > > > This is a mailing list. The whole point of a mailing list is to forward > email responses to previous posts. So, in a way, it is designed to > "clutter" your inbox. You have options in the way the list sends > messages to you here: > > http://mailman.qth.net/mailman/listinfo/elecraft > > But understand, this list is inherently different than a "blog" and the point of the list is to disseminate information to participants. Thus, there is going to be significantly more traffic than you're used to and inbox "clutter" is part of the bargain. > > 73, > Scott, N9AA > > > On 7/6/13 12:13 AM, Paul Chebi wrote: >> This note is for the log/web manager. >> >> I note that each time somebody comments on a thread ( the recent ones on metal roof), a new email is sent to all recipients. This is a nuisance cluttering the inbox. >> My experience with blogs is all comments are retained on the server Under one heading, and an email is sent daily to anybody interested in that subject upon request. >> Hope something could be done about that. >> >> Paul Chebi >> Kk4ptv > Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
Re: OT - anyone have experience with effects of metalroofs on antenna performace?
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In reply to this post by Scott Manthe-2
My suggestions for handling email from any email reflector or Yahoo group:
Sign up for individual emails - BUT - set a filter in your email client to move all emails containing "[Elecraft]" in the subject into a separate folder in your inbox (I call mine Elecraft). That effectively creates your own personal "digest", with the advantage that you can reply to any individual email (Note that with this list, just "Reply" goes only to the sender. If your email client does not have a "Reply to List", you must "Reply All" and edit out the sender's address if you want it to only be sent to the list). Just my suggestion for handling email from any list or Yahoo group. Some email clients will show you the posts in threaded fashion if you like that better (Thunderbird does that), but I prefer to list the emails in date/time received and if I want to see threaded posts, I look on Nabble (but I don't ever post or reply from Nabble) As a separate request for those who do reply using Nabble, please include a bit of the relevant thing you are responding to in the body of your post. Often the subject line no longer has anything to do with what is being referred to (such as this post) 73, Don W3FPR On 7/6/2013 12:43 PM, Scott Manthe wrote: > This is a mailing list. The whole point of a mailing list is to > forward email responses to previous posts. So, in a way, it is > designed to "clutter" your inbox. You have options in the way the list > sends messages to you here: ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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