[Elecraft] “ELECRAFT NVIS field day”

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I put up an NVIS antenna for 80m a number of years ago.  It works great 
for local 80m nets.
It is a full wave length loop (more square) mounted about 10' above the 
ground.
It is feed with 450 ohm ladderline from a 1:1 current balun at the ATU.
EZNEC shows the radiation is UP.
It also shows gain and not as much UP on 40m and 20m.
I have worked DX on all bands.

73, steve WB3LGC

On 12/18/21 4:09 AM, Ken WA8JXM wrote:
> --- "In Hawaii, 40 meters worked great for NVIS probably 11 out of 12
> months a year. Someone else who knows can comment, but I got the impression
> that 40 meters almost never works for NVIS in the mainland US.  If this is
> true, an Elecraft NVIS field day might be limited to those who either have
> room for an 80 meter dipole, or who can devise some other kind of 80 meter
> antenna that can radiate up."
>
>
> I think it depends on time of day, time of year, and what part of the
> sunspot cycle.  40m is pretty much the top limit for NVIS though.  But
> sometimes 40 works for NVIS.  That's one of the reasons for our 60m
> allocation, NVIS when 40 is too  long and 80m is dead.   OTOH  I've seen
> 160 too long for statewide coverage at times.
>
> FWIW, I agree a vertical is not an NVIS antenna.  Some people may be
> confusing groundwave (usually up to 25 miles) with NVIS.  They are totally
> different propagation modes.
>
> Ken WA8JXM
>
> On Fri, Dec 17, 2021 at 7:22 PM David Herring <david.n5dch at gmail.com> wrote:
>
>> It is absolutely true that antennas intended for NVIS use do not have to
>> be hung low.  But they CAN be.  And there are instances where doing so can
>> be desirable.
>>
>> When I lived in Hawaii, we used NVIS for reliable statewide HF
>> communications to very good effect.  When I hung my dipole up about 30 feet
>> or so, I would frequently get calls from hams in Japan, Oceana, mainland
>> US, Canada and elsewhere. Ordinarily that would be nice, but when one is
>> specifically focused on local comms, that can get to be a problem. When I
>> hung my NVIS dipole down around 10 feet, I still got excellent statewide
>> communications but no longer got calls from afar.
>>
>> So I kept my dipole low for local, and erected a vertical for DX.  Both
>> worked perfectly for their intended use.
>>
>> In Hawaii, 40 meters worked great for NVIS probably 11 out of 12 months a
>> year. Someone else who knows can comment, but I got the impression that 40
>> meters almost never works for NVIS in the mainland US.  If this is true, an
>> Elecraft NVIS field day might be limited to those who either have room for
>> an 80 meter dipole, or who can devise some other kind of 80 meter antenna
>> that can radiate up.
>>
>> 73,
>> Dave - N5DCH
>>
>>
>>
>>
>>> On Dec 17, 2021, at 11:05 AM, Julia Tuttle <julia at juliatuttle.net>
>> wrote:
>>> Wait, why would people think verticals are good for NVIS? Isn't a
>>> vertical's radiation pattern pretty much "sideways but not up", and NVIS'
>>> desired radiation pattern "up but not sideways"?
>>>
>>> On Fri, Dec 17, 2021, 12:54 Jim Brown <jim at audiosystemsgroup.com
>> <mailto:jim at audiosystemsgroup.com>> wrote:
>>>> On 12/17/2021 6:12 AM, Greg Herman wrote:
>>>>> What if there was the annual event called the The Elecraft
>>>>> NVIS field day?
>>>> There is a major myth regarding NVIS that antennas must be low. This is
>>>> totally false. The facts are that vertical antennas are terrible for
>>>> NVIS, and that horizontal antennas work better up to nearly one-half
>>>> wavelength above ground. This study ran in National Contest Journal
>>>> several years ago.
>>>>
>>>> http://k9yc.com/AntennaPlanning.pdf
>>>>
>>>> 73, Jim K9YC
>>>>
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