Good luck. Just for shiits and gigles I tried the larson 150/450/800 mobile scanner antenna on 900 but it was a no go. Very high SWR but the receive is preety good, acceptable I would have to say. I was cruising around with a 900 rig testing this a couple weeks ago and I had good range on receive with this antenna on a trunk lip mount. I'm considering one of those Motorola shark fin roof top antennas for 900. The 800 MHz versions seem to work quite well so I was thinking of trying one for 900.