On 9/23/05, Ulrich Weiss <dj2ya@t-online.de> wrote:
>
> hello Ron,
>
> From: "Herb Schoenbohm" <herbs@vitelcom.net>
> > You can get close to what you want (about 25 ohms) by tying two pieces
> of
> > 50 ohm coax equal half wave lengths (in coax factoring the velocity
> factor)
> > in parallel hooked shield to shield and center conductor to center
> > conductor...in series with the 50 ohm coax feed and the antenna. This
> > should bring you in the ballpark and totally avoid any tuner losses.
>
> Herb's suggestion will reduce your SWR to 1.6... using 75 ohm line would
> yield 1.4 and if you can get hold of 60 ohm line you'd be pretty close to
> a
> perfect match...
> after reading Maxwell's, Another Look at Reflections, I ask myself (and
> the
> reflector) if it's really worthwile to improve the match at the feedpoint
> of
> the vertical...
> regards
Shouldn't the coax lengths be electrical quarter wavelength rather than half
wavelength?
73,
Barry N1EU
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