Our local ARES group put together a "portable" 2m repeater... it is a 6 ft rack cabinet disguised as a fly-away case. Un-plug the power, and feedlines, buckle the sides on and you are ready to go... just don't forget the 6 guys needed to move it. The Vertex can be re-programmed with a laptop... but the cans are another matter. Crude tuning can be done with a ht and SWR/power meter. We used this same repeater when the fruit-loops flew that airplane into the Pentagon. It performed very well, just not my idea of "portable".
I saw several FEMA boxes that had been retired on eBay a while back.. minus the radios. You might try looking in the industrial radio section for a cheap building block to start with. The box was approx 14 inches square, and about 12 inches deep. Good luck on your project.. mike -----Original Message----- From: Jim B. [mailto:[EMAIL PROTECTED] Sent: Monday, October 18, 2004 3:45 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Mobile Duplexer Question T.J. wrote: > I acquired a Phelps Dodge 636 3/3 mobile duplexer tuned for TX freq. > of 163.8xxx and a RX freq. of 167.5xxx. What I was wondering was if > this could be tuned down into the ham band with any success for a > mobile repeater using some hand held radios. I was looking in my > Tessco catalog and saw that this unit resembles the RFS Celwave > 636-6A-3/3 with specifications of: Freq. range 164-174 Mhz, max power > 50 watts, min. separation 4.5 Mhz, There's your answer right there-4.5 Mhz is bigger than the entire 2M ham band. No, it's not practical to rebuild them to handle a narrower split. If you want a portable/mobile repeater, you should look towards UHF. The in/out spacing on 2M doesn't make it easy to do anything portable. On UHF however, the whole thing, including duplexer and power supply, can be put in a desktop-size box, about the size of a full size HF rig. -- Jim Barbour WD8CHL Yahoo! Groups Links Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
