Again, explain how the mixing products or intermod changed. If that's true, maybe you're really on to something. If I can eliminate intermod by changing the PL tone or the CWID, that would be an incredible breakthrough in RF physics.
Joe M. Jim Cicirello wrote: > > > I can tell you that the same tones on different frequencies inside the > same site can cause a problem. My 2-meter repeater was on 151.4, the > same tone as the local high band fire and channel on the VHF community > repeater. When a combination of the units with 151.4 came up, I had > inter-mod on my 2-meter machine. Also at times there was noise on the > fire that we could tell disappeared when the 2-meter dropped along with > the community repeater. Luckily I own the tower so I was able to move > my 2-meter repeater to 123.0 and it happened that my private channel on > the community repeater was also 151.4 which I also changed. Now I try > to make sure that every PL inside my site is different. Since there is > NO two PL’s the same, the problem went away. Our Motorola Tech told me > this is common at tower sites using the same PL on different frequencies. > > > > 73 JIM > > > > *From:* [email protected] > [mailto:[email protected]] *On Behalf Of *WA3GIN > *Sent:* Sunday, August 30, 2009 9:07 AM > *To:* [email protected] > *Subject:* [Repeater-Builder] Nearby Repeaters > > > > > > Looking for opinions. > > > > Our club has a couple of 2m repeaters; we chose to run them with PL and > we picked 107.2 because that tone freq. was not in use in the area. > Recently two other clubs who also have 2m repeaters have decided to > utilze the same PL tone freq. > > > > Does having numerous repeaters PL'd with the same tone freq. increase > the probability of the normally generated intermod/mixed signal to > now carry within the produced signal a correct PL tone that may land > on the input freq. of another local repeater? Is it considered a bad > practice to utilize the same PL for numerous repeaters in the same band > all located within a few miles of each other? > > > > Thanks, > > dave > > wa3gin > > > > ------------------------------------ Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/Repeater-Builder/join (Yahoo! ID required) <*> To change settings via email: mailto:[email protected] mailto:[email protected] <*> 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/
