[Elecraft] OT: NVIS with KX3

[Vic Rosenthal K2VCO]

1) I can't answer the question about power, but it's easy enough to try 
it and see.

2) 40M should work for this application.  Frequencies depend on local 
practice, QRM, etc.

3) You need a horizontal antenna for this mode, so a Buddipole would 
have to be configured that way. But I think -- since you would only be 
operating one band -- that a more efficient and simpler to use system 
would be an ordinary dipole. A good height for an NVIS dipole on 7100 
kHz would be 3 to 5 m above ground. I suspect that a loaded antenna like 
a Buddipole would be more affected by ground losses than a simple dipole.

All of the above is easy to test with two radios and antennas!

On 4/23/2014 9:03 PM, Johnny Siu wrote:
> Hello elecrafters,
>
> It is off topic and you may wish to press 'del' button now.
>
> Local ham clubs together with some hams in the China Mainland are
> going to do some drilling in ARES within the Pearl River Delta area
> (with a radius of about 50km).  NVIS could be one of the operation to
> trial run for ARES.  My questions are:
>
> 1.  Is the power output say 10w from KX3 good enough for such purpose
> under SSB? We don't want CW which requires training operators.  Phone
> mode can be operated by anyone with minimal guidance (a simulation
> under emergency).
>
> 2. During day time, is 40m a proper band to use (no 60m band in ITU
> Region 3)?  If yes, what will be usually frequencies used such
> proposes?
>
> 3.  I am going to use Buddipole for the NVIS antenna.  Did you go
> good results for similar operation in the past?
>
> Looking forward to your advice and thanks in advance.  Please reply
> off-the-list so as to save the bandwidth here.
>
> 73
>
> Johnny VR2XMC

-- 
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco/