Could be ... was thinking that myself.
Identical IF's in the same chassis area can be a problem ... unless everything is very well shielded *and* all interconnected wiring is fully filtered ... even then may not be sufficient. This is the reason the radio equipment manufacturers use a shifted IF on the second receiver in such systems. The Mitrek / MSR2000 systems use a 10.8 MHz Shifted IF ... for more details, see http://www.repeater-builder.com/mitrek/mitrek-channel-elements.html (The information contained is correct I believe but, in my opinion, could be better described ... Mike?) Hope this helps, Neil - WA6KLA mch wrote: > > I think he may mean operating on the same IF frequency, but I'm not > sure. > > Joe M. > > Mike WA6ILQ wrote: > > > > At 02:52 PM 11/29/04, you wrote: > > > > >I have read a few comments in the past about the need for changing > > >the crystal from one side of the operating frequency to the other in > > >a Mitrek. > > >I am not sure I will be wording this properly so please be patient. > > > > > >I will have two repeaters at the same site which are Mitrek > > >conversions. > > >One repeater is on 145.210 MHz (neg. offset) and the other repeater > > >is on 147.240 (pos. offset). > > >At present the 145.210 repeater is not a Mitrek but when I am > > >finished the conversion it will be replaced by the second Mitrek. > > > > > >I would appreciate comments re experiences (ie problems) encountered > > >if both receivers have the same frequency crystal. > > > > > >thanks > > > > > >Bruce, VE1II > > > > The standard 136-174Mhz Mitrek configuration uses high > > side injection, with a 10.7 MHz IF. > > > > And remember, the 147.24 repeater will be listening > > to 147.84, and the 145.21 repeater will be listening to > > 144.61 - with over 3mhz of RX to RX separation I don't > > see a problem at all. > > > > And if you are referring to the two repeaters being on > > the same channel simultaneously, well, that's what > > two different PL tones are for - set up repeater 1 on > > tone A and repeater 2 on tone B. > > > > Or am I not understanding the question? > > > > Mike WA6ILQ > > > > 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/
