Why do so many public safety systems stay on 150 MHz VHF (or heaven forbid, low band (27-50 MHz) VHF)?
- adjoining agencies with zero budget–can be mitigated with system linking hardware at the main site
- fireground mutual aid–this is standardized under NFPA 1221. Will each department keep radios for all adjoining departments? Console patch ties up resources.
- they use crossband repeaters in command vehicle for fireground/mutual aid
VHF systems often require voting receivers due to the poor performance of VHF portables. The body attenuation on a belt-mounted portable radio, particularly when using a speaker/mic on a VHF portable is of order 20 dB – only 1% of the transmitted signal gets out, maybe less.
If your agency is considering a radio refresh (major new purchase) talk to me first. I’m not in the business of selling radios. I provide professional expertise and I’m no favorite to any one technology or brand. The initial consultation as always is free, and I will work with your agency no matter how small to find a price that fits your budget. Your taxpayers can’t afford a wrong decision with 10-year consequences when so many peoples’ lives depend on your agency having the most effective communications.