I'd certainly investigate the opportunity.  My current vhf/uhf 
antenna is mounted to the air conditioner enclosure outside the house 
and the performance is barely acceptable.  Twenty or so feet up would 
be a nice advantage.  Use the best coax you can afford.
Good luck.
Pat, K9JAUAt 04:50 PM 10/15/2015, you wrote:
>Hello List:
>
>I am currently situated in an apartment(one story), and was wondering about
>the feasibility of mounting a vertical,  dual band antenna(Comet gp-3 model
>for example) to a disused, non-rotatable sattelite tv dish which I'm told is
>attached to the building's roof.  I believe that the antenna is close to 6
>feet in length, and roof is 20-25 feet high.  Has anyone had some practical
>knowledge of doing this, and would it be a worthwhile endeavor for a dual
>band transceiver base station?
>
>Not sure of length/type of coax run I would need to where I hope to locate
>my "shack".  Any suggestions/advice welcome.
>
>Best regards,
>
>
>
>David S. Pearson-wa4dsp
>
>
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