[SMCARA] SMCARA Antenna build off

[Clarke, Tom AIR4.0P NATOPS]

70 dB loss might be a bit pessimistic!  20 dB is the general rule of thumb for path loss due to cross polarization.  If your path excess is 18 dB and with the 20 dB effect of cross polarization, the result is "No signal, grasshopper"!  You can Google this, but standby for some high powered math!

Same thing on HF, but to a lesser extent due to natural polarization shift caused by nearby objects, trees, your house, a fence, the Earth, that F-150, as well as atmospheric and propagation effects (skip).

Always remember "Clarke's First Law of Antennas";: "If it sounds/looks stupid, but it works, it's not stupid"!

Wonderful stuff!

73 Tom/W4OKW

-----Original Message-----
From: SMCARA [mailto:smcara-bounces at mailman.qth.net] On Behalf Of Rene Ramirez
Sent: Tuesday, December 09, 2014 9:28 AM
To: Daniel Metcalf
Cc: SMCARA Reflector
Subject: Re: [SMCARA] SMCARA Antenna build off

I was under the impression that SSB/CW was done in HORIZONTAL polarization and FM work was done in the vertical.  I know there is no set "law" saying as much but there is that pesky 70db loss thing if you try to work a station horizontal if you are vertical and the other station is opposite.

Ren...


On Tue, Dec 9, 2014 at 8:54 AM, Daniel Metcalf <kb3uun at gmail.com> wrote:

>
> Good thoughts Gary.
>
> We are currently reviewing all of the suggestions including the
> proposed rules that were created by Tom (ND3N).
>
> The suggested test procedures can be found in the back of the 22nd
> Edition of the ARRL Antenna Book. If I remember correctly it is
> section 27. I can confirm and send out another email once I get back
> to my shack this afternoon. For those who do not have a copy of the
> 22nd Edition of the Antenna Book I have the desired section in PDF
> form. I can place it in my dropbox and send a like to it if there is enough interest.
>
> 73,
> Dan (KB3UUN)
> c. 301 769 1111
>
>
> On Tue, 2014-12-09 at 01:23 -0500, Martin Gary wrote:
> > Hey guys,
> >
> > If you’re building a vertical antenna (for SSB) cut it for 144.5
> > MHz. If
> its vertical (FM) cut it for 146.500 MHz. I think FM should be the
> target band because everyone has an FM 2 meter radio. Just M.H.O. 73,
> Marty - N3HRT
> >
> >
> > > On Dec 2, 2014, at 1:16 PM, Daniel Metcalf <kb3uun at gmail.com> wrote:
> > >
> > > Jason,
> > >
> > > Don't start building yet. We are still getting the contest organized.
> > > The operating or test frequency is something that we still need
> defined.
> > > Do you have a preference?
> > >
> > > Dan
> > >
> > > On Tue, 2014-12-02 at 13:05 -0500, jbr13 at md.metrocast.net wrote:
> > >> Dan,  I am starting to gather things for the 2 meter antenna
> > >> build off and have one question I don't remember seeing the
> > >> answer to.  What target frequency should the antenna's be built for?
> > >>
> > >>
> > >>
> > >> Thanks
> > >>
> > >> N3YUG
> > >>
> > >> Jason Rearick
> > >>
> > >>
> > >
> > >
> > > ______________________________________________________________
> > > SMCARA mailing list
> > > Home: http://mailman.qth.net/mailman/listinfo/smcara
> > > Help: http://mailman.qth.net/mmfaq.htm
> > > Post: mailto:SMCARA at mailman.qth.net
> > >
> > > This list hosted by: http://www.qsl.net Please help support this
> > > email list: http://www.qsl.net/donate.html Message delivered to
> > > martin.gary at verizon.net
> >
> > "Life's tough …it's even tougher if you're stupid."
> >
> > - John Wayne
> >
> > ______________________________________________________________
> > SMCARA mailing list
> > Home: http://mailman.qth.net/mailman/listinfo/smcara
> > Help: http://mailman.qth.net/mmfaq.htm
> > Post: mailto:SMCARA at mailman.qth.net
> >
> > This list hosted by: http://www.qsl.net Please help support this
> > email list: http://www.qsl.net/donate.html Message delivered to
> > kb3uun at gmail.com
>
>
> ______________________________________________________________
> SMCARA mailing list
> Home: http://mailman.qth.net/mailman/listinfo/smcara
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:SMCARA at mailman.qth.net
>
> This list hosted by: http://www.qsl.net Please help support this email
> list: http://www.qsl.net/donate.html Message delivered to
> w3bnyren at gmail.com
>
______________________________________________________________
SMCARA mailing list
Home: http://mailman.qth.net/mailman/listinfo/smcara
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:SMCARA at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html Message delivered to frederic.clarke at navy.mil