Just added 4 more radials to my 17m vertical now I have the minimum of 8. Probably gained somewhere around a db but thats a pretty cheap db! Checked the VSWR prior to adding the radials and after and was pleased with the results so much so that I am going to add another 4 radials to the 40m, 30m and 20m verticals that I recently built.
Freq before the addition of radials after the addition
18.0 1.25:1 1.05:1
18.068 1.25:1 1:1 WOW!
18.2 1.3:1 1.1:1
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