The antenna analyzer MAY be showing the coaxial impedance but the
'Cushcraft box' at the yagi (4:1 balun, I think) may have an OPEN
secondary, which would then, at RF frequencies, show infinite
impedance = HIGH SWR.
You MAY have to lwoer the yagi and check that 'box'.
Good luck
Don
N8DE
Quoting Gary Stone <n5phtgs@gmail.com>:
> Greetings,
>
> I have a Cushcraft ASL2010, 8 element Log up at 80 feet. All of a sudden
> the SWR went up well over 5:1 on all 5 bands the antenna covers (20-10
> meters).
>
> I have an Array Solutions RatPak - 6 position antenna switch at the base of
> the tower. I have a sloper for 80 meters and a G5RV.
>
> I have completed several trouble shooting steps and still puzzled. The
> most significant trouble shooting route was to use an SWR analyzer directly
> at the base of the tower and in the shack. At the base of the tower
> everything is eliminated except the coax to the beam and the beam itself
> (including of course the little Cushcraft match box at the beam).
>
> And here is the interesting thing: The SWR Analyzer can be set to show SWR
> and IMPEDANCE. On all 5 bands the IMPEDANCE is around 50 ohms (which would
> be correct) HOWEVER, the SWR remains very high.
>
> Any help greatly appreciated.
>
> Gary Stone, N5PHT
>
> ****** Gary Stone, N5PHT ******
> **** 347 CR 1250 ****
> **** Savoy, Texas 75479 ****
> UNITED STATES OF AMERICA
> _______________________________________________
>
>
>
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