[TowerTalk] velocity factor?

[TexasRF--- via TowerTalk]

Hans, I have seen foam filled hardline with velocity factors in that range. 
 Your loss test shows that the cable is ok.
 
73,
Gerald K5GW
 
 
 
In a message dated 10/8/2014 10:19:35 A.M. Pacific Daylight Time,  
towertalk at contesting.com writes:

Dear Ham  Friends,


Recently I checked my feed lines to my tower. I have 1"  hardlines, each 88 
feet long. I checked the loss by measuring the SWR at  various frequencies. 
(~0.8dB @150MHz)


I decided to also check the  velocity factor. I was a little puzzled to get 
a factor of 0.8. Does that make  sense? It's a foam filled coax. I expected 
something around 0.9.  


My resonances were 2.2, 6.767, 11.228, 15.673, 19.945, 24.335,  resp. 28.53 
MHz indication an electric 1/4 length of 33.73 meter or 110.67  feet. 
88/110.67=0.795.


Any comments? Did I do anything wrong? The  coax were open in the other 
end. Does that give me the wrong  value?


73 de,


Hans -  N2JFS
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