[CTSARA] NVIS Antenna Challenge

[Jonathan Solomon]

What is NVIS?

In short, it makes your long wave radio wave bounce at a high angle,
allowing you to use HF (normally used for long-er distance communications)
to talk much short distances (40-100 miles).  It has further coverage than
VHF/UHF (even with repeaters).  Think of this analogy:

You are playing basketball with your friends.  You pass the basketball to
your teammate by thrusting from your stomach across the court (laterally).
This is how HF signals normally travel.

Now you are the bully on the playground and you don't want to share.  You
take the basketball above your head and slam it on the ground, causing it
to bounce almost straight up (vertical!), over the nerdy kid with glasses,
and to the other bully.  This is how NVIS works.

NVIS is a good way to get Worked All States in the New England Area. ;)

Here are some places you can look for more information:

http://www.tactical-link.com/field_deployed_nvis.htm

http://www.antennex.com/shack/Jan02/nvis.html

www.w5pms.info/wp-content/uploads/2012/04/*NVIS*-Antennas.pdf

This would be a good "club" project if there is enough interest.

73s


On Fri, May 24, 2013 at 7:51 AM, Jon Perelstein <jon.perelstein at gmail.com>wrote:

> Doug Sharafanowich in Region 2 has come up with a fun idea to try out
> NVIS antennas -- an NVIS Antenna challenge!!
>
> I'm going to participate using my Buddipole and possibly one other
> antenna that I hope to build between now and then.  Basically, the
> concept is a low horizontal antenna about 0.1 or 0.2 wavelength above
> ground (based on the band selected).
>
> 73s
> Jon
>
> -----------------------------
>
>
> Hi Everybody,
>
> QUESTION:
>
> What do you do when repeaters fail, and 144/440 Simplex just won’t go
> the distance?
>
>
>
> ANSWER:
>
> Use your HF Near Vertical Incident System (NVIS) Antenna, of course!
>
>
>
> ANNOUNCING "The 30 Days to NVIS Challenge"
> and
> Great NVIS Antenna Competition
>
> CT ARES - Region 2 is pleased to sponsor this fun NVIS Antenna
> communications event.
>
> - It is open to all CT ARES TEAM members in ALL 5 Regions.
>
> With the change in weather and warming temperatures, AND BEFORE THE
> NEXT HURRICANE SEASON begins,now is a great time to build your "field
> portable/deployable" HF NVIS Antenna .
>
>
>
> Are you up for the challenge?
> Your 30 Days starts TODAY ! (5/15/13)
>
>
>
> NVIS Antenna Competition Date:  Saturday, June 15, 2013
>
>
>
> Complete (updated) details at:
>
>
> http://ctaresregion2.org/forum/antenna-central/190-build-and-test-your-own-nvis-antenna-6-15-13#217
>
>
>
> Regards,
>
> Douglas Sharafanowich – WA1SFH
>
> District Emergency Coordinator, Region 2
>
> Connecticut Amateur Radio Emergency Service (CT ARES)
>
> (Home) 203-876-1189      [Cell] 203-494-3885
>
> www.ctaresregion2.org
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