Have you ever used diplexers at each end of a coax run? I am liking that idea for a couple repeater sites. One LMR 900 would be half the price of two. All the repeater sites have antennae at different frequencies.
Mike At 09:30 PM 10/29/2009, Marlon wrote: >How high is the tower this is all on? > >If you run the calcs for line loss, even at 5 gig, up to 100' of coax isn't >horrible much of the time. I'm putting more and more radios back on the >ground these days. > >LMR 600 or 900 can pay for it's self in a climb or two. > >laters, >marlon > >----- Original Message ----- >From: "Mike" <m...@aweiowa.com> >To: "WISPA General List" <wireless@wispa.org> >Sent: Thursday, October 29, 2009 6:04 PM >Subject: [WISPA] Fault tolerant tower deployment > > > >I have been thinking of putting together a fully fault tolerant tower > >setup. > > > > 1 antenna; two radios. Separate CAT5, separate box. If one radio > > failed, the other would come on-line. The replacement climb would be > > taken out of the EMERGENCY category. > > > > A complete system would be a 3) 5.8 120 degree sectors, plus 3) 2.4 > > (or 900 MHz) degree sectors. 6) small waterproof enclosures would > > contain a router and one of each radio. > > > > I know on some of the MT router boards there is a fan header that > > could be used to energize a relay. Microwave relays are readily > > available and have acceptable insertion loss. Would a stripline > > divider like Cameron suggested in another thread be the answer > > instead? Passive solutions are always better. If the antennas were > > dual-band, wind load on a tower could really be lowered. Besides > > redundancy, consolidating wind load would be my goal. > > > > Has anybody done anything like this? Can't seem to find any on the net. > > > > Am I mad? Mike > > > > > > > > > > > -------------------------------------------------------------------------------- > > WISPA Wants You! Join today! > > http://signup.wispa.org/ > > > -------------------------------------------------------------------------------- > > > > WISPA Wireless List: wireless@wispa.org > > > > Subscribe/Unsubscribe: > > http://lists.wispa.org/mailman/listinfo/wireless > > > > Archives: http://lists.wispa.org/pipermail/wireless/ > > > >-------------------------------------------------------------------------------- >WISPA Wants You! Join today! >http://signup.wispa.org/ >-------------------------------------------------------------------------------- > >WISPA Wireless List: wireless@wispa.org > >Subscribe/Unsubscribe: >http://lists.wispa.org/mailman/listinfo/wireless > >Archives: http://lists.wispa.org/pipermail/wireless/ -------------------------------------------------------------------------------- WISPA Wants You! Join today! http://signup.wispa.org/ -------------------------------------------------------------------------------- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
