Here is a Flat Coax Cable that will get the coax from the outside to the inside. In the search box at ,
http://www.solidsignal.com , type in , holland 144823 . I suggest using the antenna you have , you can get creative with Duct Tape or Box Tape and Plastic Bag and seal the antenna for use on the balcony. If you will like to use a outdoor type antenna then use a ,
http://www.antennasdirect.com/store/...VHF-Combo.html ,
http://www.antennasdirect.com , Clear Stream 2 Complete. The Clear Stream 2 Complete will most likley not need a amplifier with the antenna on the balcony.