Charles, We would tell them that you are going to use a side arm bracket for a and antenna that is similar to the DB314 and then put a DB408 pointing up on the top and a DB264 pointing down (or similar antennas). Use a RX- TX XBC-020-80 to couple the two antennas at the top of the tower and use a single feed line to the repeater with another RX-TX unit to de- couple for each repeater.
We've done this on a couple of installations and got past the "one antenna" requirement and it works very well. Technically it's one feedline and one mounting arm, so it's not too far off. Just be truthful with the antenna legnths so the tower owners know what the wind loading is. Dwayne Kincaid WD8OYG > > Let me start by saying that I have been around ham repeaters for a long > time but I have not set one up this way. I have been given the > opportunity to use a 220 foot tower near the high school radio club's > location. We are being allowed to mount one antenna at the top and use > of the building at the base. We have two repeaters one on 145.35 and > one on 444.625 that will need to use one antenna. I need advice on the > antenna choice and diplexor for the setup. I know this may not be the > best solution but it is what we are allowed. We have 300' of new > andrews 1/2" hardline and new connectors and hardware donated by a > former student of mine. Any advice would be appreciated. > > Charles Lowery, NM4V >
