[SMCARA] SMCARA Antenna build off
Clarke, Tom AIR4.0P NATOPS
frederic.clarke at navy.mil
Tue Dec 9 12:12:04 EST 2014
I find that a little levity helps in technical discussions!
Tom/OKW
-----Original Message-----
From: Dave Q [mailto:quickskys at gmail.com]
Sent: Tuesday, December 09, 2014 12:07 PM
To: Clarke, Tom AIR4.0P NATOPS
Cc: SMCARA Reflector
Subject: Re: [SMCARA] SMCARA Antenna build off
I appreciate this conservation. Being new I get to learn all kinds of thinks from you guys. Next time I'm trying to work a rare DX....I'm moving my F-150 out of the garage to improve my "natural polarization shift". Hi Hi
73
Dave - W3DLQ
On Tue, Dec 9, 2014 at 11:40 AM, Clarke, Tom AIR4.0P NATOPS <frederic.clarke at navy.mil> wrote:
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 <tel:301%20769%201111>
>
>
> 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
> > >>
> > >>
> > >
> > >
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