Re: [TowerTalk] K6STI Receiving loop question

[Joe - WDØM <WD0M@centurytel.net>]

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


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