VHF 136-174 MHz MHz replacement whip SMA antenna XTS1500 XTS2500 XTS3000 XTS3500 XTS5000 HT1000 JT1000 PR1500 MT1500 MT2000 MTS2000 MTX800 MTX838 MTX850 MTX850LS MTX8000 MTX8250 MTX8250LS MTX9000 MTX-LS STX Visa Astro-Saber