Topband: 160m Inverted L High SWR

Bill Stewart cwopr at embarqmail.com
Thu Oct 3 15:47:53 EDT 2013


To all who responded...many thanks. 
I am now in the process of reading over all the suggestions, which 
were plentiful. 
  
So far I have tried folding back (shortening) the C-P wires by 2 ft....no 
change, but I'm gonna make a more drastic change and see what that 
does. I changed the coax run also, with no change. SWR still just shy of 
3:1. I will move on to some of the other suggestions. 
  
Question 1: there was mention of tuning the C-P wires. Does that mean to 
trim them to the desired operating freq (swr min)...leaving the vert as is? 
Would the method be to apply rf between one wire (all others unhooked) 
and the vert and adj the C-P wire for the desired freq. 
  
Question 2: there was also mention of using a choke at the feed point. 
Recommendations were 30T of 9913 on 8" dia & 30T of RG8 on 6" dia. 
I'm using RG8X so I guess abt the same T/dia would work..doesn't seem 
too critical.  
  
I can only extend the horiz. section abt ten more feet before the end gets 
into the support tree so will probably have to leave it around 130' long. 
I will only be running a max of 200w so no hi-pwr coax or other HV devices 
should be needed. 
  
Again, thanks for all the helpful comments...now out to the back yard..again. 
73 de Bill K4JYS 


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