There are many 1.2 repeaters in Northern California that are comprised of a pair of TM-541's. Several of the systems are linked and get alot of activity with no failures. The Mitsubishi power brick in the 541's is rated at ~18 watts. From the factory the high power setting is 10 watts, so it is some what de-rated to start with. I've just added two small fans to the heat sink and my repeater has been going strong with the original radios since 1995.
Here are a few pics of a TM-241 showing the COS connection point, it's the same in all the x41 and x31 radios. http://www.fitzharris.com/~fitz/x41/ For duplexers check out Angle Linear and Telewave. I'm using Wacom, but we all know they are gone. -Sean On Tue, 27 Jul 2004, Russ wrote: > I see that icom makes the D-star didi/ana repeater but i have not heard > results , and as far as mobles being used , well the local 2 meter > repeater here in canton is a pair of 1971 icom -28A radios modded out > hooked to Scomm7K controller , 31 yrs and still strong at 30 watts , > not to mention 4 different antennii and 2 changes of Feedline , > Lightning is not kind in my area esp when the 200' tower is on one of > the highest hills around ..... > > I was thinking of going the kenwood tm541 direction my self but the > only problem is where to tap the COR/COS point , and after that what > kind of duplexer or notch filter would u use at that freq , i know > comet makes a nice 14.1 dbi base/repeater for around $150 , and we > have enuf hardline to send it upa 100' tower , just not sure of the > actual radios and controller yet and all the interfacing of it ........ > > Russ > N3TIH > > ----- Original Message ----- > From: "Jack White" <[EMAIL PROTECTED]> > To: <[email protected]> > Sent: Monday, July 26, 2004 7:46 PM > Subject: RE: [Repeater-Builder] 1.2 ghz repeater > > > > Russ, > > I have been looking for the same information myself. Haven't found much > yet > > other than the Icom D-Star someone mentioned. They are supposed to work > > digital and analog! I have heard of a few installations where guys are > > running 2 Kenwood 541s back to back with some minor mods. I don't usually > > recommend using ham mobiles for repeater duty but they will work in a > pinch. > > The main problem using mobiles is that the power amps are designed for > > intermittent duty, not 100% duty as needed for repeater operation. > Switching > > to low power and using a fan can help. Sometimes ham mobile transmitters > > have spurious emissions that hinder repeater operation. A repeater > > transmitter needs to be clean. Check the Kenwood specs. Maybe they're ok. > > If you find any More information that helps, I'd love to hear about it. > > > > Good Luck, > > J. White > > WA2RZG > > > > -----Original Message----- > > From: Russ [mailto:[EMAIL PROTECTED] > > Sent: Monday, July 26, 2004 12:03 PM > > To: [email protected] > > Subject: [Repeater-Builder] 1.2 ghz repeater > > > > who makes 1.2 ghz equipment for repeater usage , im drawing a blank > and > > web searches arnt proving helpful either ... > > > > Russ > > N3TIH > > > > > > > > > > > > > > > > Yahoo! Groups Links > > > > > > > > > > > > > > > > > > > > > > > > > > Yahoo! Groups Links > > > > > > > > > > > > > > > > > > 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/
