Louis, You might be in luck. I'm near you and bet I know which event you are gearing up for. Is Charlie involved?
I have a personal project with parts already acquired. UHF GE EXEC Mobile with xtals Coordinated for Texas portable use, NHRC micro controller. Etc. My goal was to build a low power portable rptr that used minimum current for temp battery use that I could loan out to events. Mikes comment were helpful also, cept I prefer to drive the 4 wheeler up if possible. Hihi. Email me direct. Mycall at mycall.com 73 Don Kirchner W5DK From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of Louis Sent: Monday, September 29, 2008 9:45 PM To: [email protected] Subject: [Repeater-Builder] Portable Temporary Repeater I apologize if this has been addressed previously, or even close! Do not have a substantial amount of time to complete this research! Situation: An event in a remote area, one hill top is well enough that coverage at around 10 watts VHF for the repeater could cover most of our Aid Stations, 2 with HT's, the other 3 with Portables at 25 watts or so, could get into the repeater! In the past, we have used crossband UHF in, VHF out, and it worked ok! Except for issues with a couple of HT's not being able to cut the input out during transmit! My goal, is to design a lite weight, low power consumption (i.e. fewest batteries possible, as the hill top is only assessable by hiking or horseback! What I have on hand: Single band 2m HT for receive Single band Yaesu 2M FT2800R for transmit @ 12.5 watts! Pair of homebrewed 2 m aluminum j-poles Need to acquire: simple controller - NHRC-2 looks workable! batteries - based on estimated power consumption of final configuration! Basically the question is: at a 2 mhz seperation (odd split) on VHF can one get away without using duplexers (cans), utilizing separate rx/tx antenna's, spaced about 20 ft apart! Without desense or other issues! Being such a remote area, and the nearest 2 meter repeater is well over 50 miles away, and nowhere near these frequencies - 145.500 rx/147.500 out using a tone of 179.9, I do not see any interference issues there! Observations, suggestions, and your crazy are appreciated! Thank You, K1STX
