[pskmail] Re: Antennas

  • From: Kovelan <kovelan@xxxxxxxxx>
  • To: pskmail@xxxxxxxxxxxxx
  • Date: Wed, 10 Jun 2009 08:15:45 -0700 (PDT)

The server uses a vertical at ground level and the NWS (a client)
uses a vertical set of ham sticks (dipole) up about 20', on one 
crowded tower.  

eddie (kd5wdq)

--- On Wed, 6/10/09, Per Crusefalk <per@xxxxxxxxxxxx> wrote:

From: Per Crusefalk <per@xxxxxxxxxxxx>
Subject: [pskmail] Re: Antennas
To: pskmail@xxxxxxxxxxxxx
Date: Wednesday, June 10, 2009, 8:37 AM

I agree with Rick, vertical antennas are easy to install and work great
for pskmail on 30 meters.

I use a 12 meter (40 feet) fiberglass flagpole, one of these actually:
http://www.flagmore.com/en/index.php?id=290

The manufacturer installed a rather thick wire inside it (I think its a
12 mm wire) and I feed that using an ICOM AH-4 installed at the base of
the flagpole. I have abt 16 radials buried around the pole, they are 13
meter long each.

This gives me an invisible antenna, no neighbor or xyl has complained.
The takeoff angle is abt 20 degrees on 30 meters and thats pretty good
for center europe. It has worked great for me, I hear wb5con every night
and tracked c56dl across the atlantic.

73 de Per, sm0rwo

ons 2009-06-10 klockan 08:11 -0500 skrev Rick W:
> Good questions Mike,
> 
> The 30 meter band is not available for NVIS in most areas, so it is 
> working with longer haul, lower angle propagation. The physical length 
> of a dipole (or inverted vee) is around 45 - 46 feet so is much easier 
> to work with than the lower frequencies. And a full size vertical is 
> only about half that, so is very easy to install.
> 
> I use a ground mounted Butternut HF-9V vertical with just over 30 
> radials for most bands above 80 meters. Verticals can work well as an 
> omnidirectional antenna for multiple bands, however they can not be used 
> as well for NVIS operation.
> 
> Daytime coverage on 30 meters is typically farther than 40 meters. My 
> station in SW Wisconsin can often connect with WB5CON in northern 
> Mississippi (~ 1000 miles). Thirty meters can shut down at night during 
> low sun spots, but if it stays open, can go very long and probably would 
> not be as useful for that kind of distance.
> 
> A practical network of stations, where you can connect with high 
> reliability, must have multiple bands of operation and could even have 
> VHF coverage.
> 
> 73,
> 
> Rick, KV9U
> 
> 
> 
> Decossas, Michael wrote:
> > All,
> >        Mike, here in New Orleans, just a question for everyone on the 
> > group. Is there a preferred antenna type? Vertical, horizontal, VEE etc.
> >  
> > On the testing server I have set up, I am running a 30M inverted "VEE" 
> > style wire antenna at about 30'.
> >  
> > For 30M, what is everyone else using? What kind of "coverage" are you 
> > getting and who, if anyone has decent propagation after about 9:00pm...
> >  
> > Just some questions.
> >  
> > I am almost done testing the server side, e-mail is flowing in and 
> > out, now to just get the web monitoring part going....
> >  
> > Thanks,
> >  
> > Mike-KB5OZE
> > ------------------------------------------------------------------------
> >
> >
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> >   
> 
> 





      

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