[SECC] swr on 6 mtr beam

[David Thompson]

I skipped getting the 4 el 6 meter beam as it is rated at 400 watts PEP.  Sounds like there is something in the beam that did not like the high power thus the change in SWR and frequency.

Dave K4JRB
  ----- Original Message ----- 
  From: Courtney Judd 
  To: ACG 
  Cc: SECC 
  Sent: Monday, September 09, 2013 4:24 PM
  Subject: [SECC] swr on 6 mtr beam


  ok antenna gurus what did i do wrong? originally the swr on this 4 el Hygain 6 mtr beam was a perfect 1:1 at 50.1 . But I wanted to run high power thru it so the manual calls to change the coax balun from rg58 to rg213 which i did except I think that the coax was RG8. It was cut to the same length as the 58 as per the manual. Now the swr at 50.1 is 2:1 and the resonant point for 1:1 is clear up at 52.0 . I don't want to change the element lengths as they should be right on. Only thing else is move the beta match in or out some.... or match it some other way. Would the 213/rg8 make that kind of difference? Maybe I should change the length of that coax! Ideas? help!!!! lol, Cort K4WI



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