Mike, I thought there was some reference to a signal generated by the oscillator crystal in one receiver getting into the other receiver and causing a problem. I have not been able to find ref to it in a search of the messages. Perhaps it is only a concern if two receivers are operating on the very same frequency as with voting. I understood there was a recommendation for using a high side crystal frequency in one receiver and a low side crystal frequency in the other. Might it have implied that the receivers might pick up the "wrong" input signal as interference? Hardly any repeaters up here in the boonies are set up to use PL tones. I see only one repeater in Nova Scotia is listed as requiring PL tones. Perhaps our two repeaters should be the second and third! :-) I know were do have some problems at times where one repeaters output signal causes the other to come on. But it only happens once in a while. Just wanting to cover my bases! I appreciate any advice.
Bruce ----- Original Message ----- From: "Mike WA6ILQ" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Tuesday, November 30, 2004 5:20 AM Subject: Re: [Repeater-Builder] need input on changing Mitrek oscillator crystal > > 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 > > > > > > > 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/
