[TowerTalk] Remote Fed Doublet?

[Tony]

  All,

I have a 38 foot fiberglass push-up pole which I'd like to use to 
support a Doublet antenna. The perfect location for the mast is some 15 
feet away from the shack.

The existing coax feeds that go to my tower run outside the house from 
the bottom floor and the shack is on the second floor; I would have to 
feed the Doublet the same way.

The question is, would it be possible to run 25 feet (or so) of coax 
using a remote balun without compromising the effectiveness of the 
antenna too much or running into tuning problems?

Thanks,

Tony