Steve wrote: > It seems logical that if a rptr tx is running 200w, and the mobile is running > say 50w then it is going to be one way ie mobile hears rptr but rptr don't > hear mobile too well
Common misconception. Lets say the mobile radio has a receive sensitivity of -116 dBm and 50 watts of transmitter power. The repeater has a receive sensitivity of -122 dBm - how much power will it take to balance out the receive advantage of the repeater? If you said 6 dB, you are correct. 50 watts with a 6 dB improvement is 200 watts. I have seen several VHF and UHF repeater systems with -125 dBm actual sensitivity on air - connected to the antenna and duplexing. You do the math... 400 watts is the answer. The original poster mentioned an LDG voter and remote links. If the repeater has remote receivers that will increase the distance of operation from the transmitter, he'll need all of his 200 watts. Kevin Custer
