[TowerTalk] CATV Hardline As Elements

[N4CW at aol.com]

Being financially "challenged" and not having any reasonable sources of 
aluminum for antenna experimenting, I thought of using CATV hardline as elements 
(on perhaps a 6- or 10-meter yagi). I've got some 7/8" that I can use. It's 
fairly rigid in short lengths.
Has this been tried before? Successfully?
If not, what are some potential problems? I just plan to ignore the center 
conductor in the parasitic elements (but, I have thought of feeding the center 
conductor in the driven element and allowing capacitive coupling to the 
aluminum outer shield to transfer the r.f. with little loss.)
Thoughts and advice are appreciated.
Bert, N4CW/1