[MRCA] 40M NVIS - no go
ersmar at comcast.net
ersmar at comcast.net
Sun Mar 19 15:08:09 EST 2006
Rob et al:
The local PVRC contest club reported stinko conditions on 80 and 40 yesterday during a Russina contest. I suppose I had experienced a taste of those bad condx. Plus, I didn't have the V wires for 80M ops with me, just 40, and my rig's internal tuner balked at loading the 40M wires on 80.
Oh, well, back to my income tax paper work.
73 de
Gene Smar AD3F
-------------- Original message ----------------------
From: "Robert Flory" <robandpj at earthlink.net>
> 25 feet is fine for NVIS on 40m. Half wavelength is the bummer height
> where you have a null straight up. 25 less than a quarter.
>
> Sounds like you needed to be on 80.
>
> Rob Flory
> robandpj at earthlink.net
> www.home.earthlink.net/~navyradio WWII Navy Radio
> www.home.earthlink.net/~robandpj Les Flory Television and Electronics
>
>
> > [Original Message]
> > From: <ersmar at comcast.net>
> > To: <mrca at mailman.qth.net>
> > Date: 3/19/2006 11:50:52 AM
> > Subject: [MRCA] 40M NVIS - no go
> >
> > Gents:
> >
> > When I arrived at the site of the disaster preparedness demo
> yesterday,
> > I found that another Ham had already strung up a 40M dipole between to
> mil
> > masts on the asphalt -paved parking lot. We used his skywire all day.
> >
> > I believe he had it suspended too high for adequate NVIS work. My
> guess
> > is the center was about 25 feet in the air and the ends were a bit
> higher.
> > In any case, 40 was long for us all morning. I worked SC, MI and NH, but
> > nothing like MD, VA, PA or DE. There were a few local stations checked
> in
> > to ECARS but I couldn't hear them.
> >
> > The room we were in (we didn't set up outside) was filled with
> > spectators and others demo'ing their wares (Search Dog teams, horseback
> S&R
> > folk, local PD, EMTs, etc.) and the background noise was deafening. I
> > couln't hear the RX well without turning up the volume and interfering
> with
> > adjacent conversations. Next time I'll bring two sets of headphones: one
> > for me and one for visitors.
> >
> > However, I now have about 80% of the NVIS antenna system we
> discussed
> > here last year. I'll construct the 80/60M dipole portion, install it and
> > the 40M kit in the front yard somehow, and report to you gents. My guess
> is
> > that the 80M version might be too long to install at Gilbert in the small
> > grassy square in front of the exhibition hall we typically set up in.
> Any
> > suggestions?
> >
> > 73 de
> > Gene Smar AD3F
> >
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>
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