[MRCA] NVIS on 40M - reprise

[Roger Klingman]

Rev. Don,
Good to se you back on the MRCA, when I didn't hear from you I was afraid
your computer was down. Do you still have those Gonset crystals for sale?
73,
Roger - k0rmk
----- Original Message ----- 
From: "Rev. Don Sanders" <innatehealing at bigplanet.com>
To: "Military Radio Collectors Association" <mrca at mailman.qth.net>
Sent: Sunday, March 12, 2006 5:56 PM
Subject: Re: [MRCA] NVIS on 40M - reprise


> A couple years ago there was a listing on
> QRP-L  I believe showing a home brew
> version of the AS-2259 NVIS-I lost the
> URL in a disk crash but I have a printed
> copy.  His model is non resonant and
> requires a tuner. He references a web
> site by WB5UDE with a lot of info on
> the NVIS.
> Healthfully yours,
>                           DON W4BWS
> ----- Original Message ----- 
> From: <ersmar at comcast.net>
> To: <mrca at mailman.qth.net>
> Sent: Sunday, March 12, 2006 5:31 PM
> Subject: [MRCA] NVIS on 40M - reprise
>
>
> > Gents:
> >
> >      I got to thinking a bit about that low resonant frequency that I
> measured for my 40M inverted V yesterday.  Today I actually took out a
> calculator and did the math: 468/70 feet = 6.69 MHz.  So in reality my
> measured low SWR freq for the V was right on the money for 70 feet of
wire.
> (Something's gotta be wrong.)  So I'll proceed to prune some length (70
> feet - (468/7.25 MHz = 64.5 feet)) or about 5.5 feet total off the wires
> next time I erect it so the SWR will be lower in the SSB portion of the
> band.
> >
> >      Also, today I added a foot of plastic chain (Home Despot again)
> between the ends of the wires and the nylon guy rope (HD, irridescent
red.)
> As I expected, the rope, chain and wires wrapped up nicely and neatly on
the
> rope's original plastic spindle.  I have one half of the dipole/V on each
> spindle.  (I got this idea from ebay.  Someone was selling a special
forces
> wire antenna kit from the Brits.  The kit clearly showed a plastic chain
set
> in line between the guy rope and antenna wire.  Pretty slick.)
> >
> >      BTW - I used #14 stranded insulated house wire (HD) for the dipole.
> I'll experiment with this stuff, and even use it in the demo next week.
> Then I'll rebuild the dipole with some superflex #536 from The Wireman.  I
> believe it's not on his web pages, but he had some special made for
another
> customer and I bought 300 feet of it.  It's very soft but relatively heavy
> gauge.  I believe it's #14, as well.
> >
> >
> > 73 de
> > Gene Smar  AD3F
> >
> > P.S.  I'm also awaiting delivery of my second RT-70/AM-65 set.
Hopefully
> will have one of the two at Gilbert this year.
> >
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> >
>
>
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