Re: [TowerTalk] K6STI Receiving loop question

[Joe - WDØM <WD0M@centurytel.net>]

Good point - how close is "close enough" - but if you're doing it the first 
time, why not 'do it right" instead of having to do it over?  :-)
73,
Joe
WDØM

At 01:11 PM 11/18/2004, Pete Smith wrote:
> On the other hand, if it is a receiving antenna, do you care?  The 
> additional loss in the feedline due to SWR *may* be trivial in this 
> application.
>
> 73, Pete N4ZR
>
> At 02:51 PM 11/18/2004, Joe - WDØM wrote:
>
> > Hi Dave,
> >
> > Perhaps the easiest way (if you have an antenna analyzer or access to 
> > one) is to check the impedance at the antenna using an antenna 
> > analyzer.  That will tell you which way to go in modifying the turns 
> > ratio.  I just put a beverage antenna together, and the analyzer was very 
> > helpful in assembling the transformer.  I used my Autek analyzer - and 
> > it's probably the best investment I've made to be sure every watt I own 
> > gets to the antenna and then on to the other guy's radio.  ;-)
> >
> > 73,
> > Joe
> > WDØM
> >
> >
> > At 11:47 AM 11/18/2004, Dave Quick wrote:
> > > I recently put up a K6STI loop for 80m. It's about 8 feet off the ground
> > > and built according to the plans in the Sep. 95 issue of QST. It's 21
> > > feet on each side and I used 450 ladder (window) line and a 77 mix
> > > ferrite bead for the transformer.
> > >
> > > My problem is that I can't get the SWR below about 3:1 or so. I do get a
> > > dip as I adjust the cap, but never below 3:1. I'm guessing that I need
> > > to adjust the turns ratio of the transformer, which is 4 turns to 10
> > > turns as the QST article specifies, but I'm not sure which way to go
> > > with the turns ratio.
> > >
> > > Does anyone have an advise for me?
> > >
> > > Thanks.
> > >
> > > Dave Quick K0EKL
> >
> >
> > _______________________________________________
> >
> > See: http://www.mscomputer.com  for "Self Supporting Towers", "Wireless 
> > Weather Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with 
> > any questions and ask for Sherman, W2FLA.
> >
> > _______________________________________________
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> > TowerTalk@contesting.com
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_______________________________________________

See: http://www.mscomputer.com  for "Self Supporting Towers", "Wireless Weather Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with any questions and ask for Sherman, W2FLA.

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