Re: [Repeater-Builder] need input on changing Mitrek oscillator crystal
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: Repeater-Builder@yahoogroups.com 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/
[Repeater-Builder] Question on Mitrek conversion
Hi, I do not recall seeing a "commandment" saying that the existing white coax coming from the antenna relay to the receiver and to the transmitter should definitely be replaced with something better. Is it double shielded cable? I realize that in its first life the Mitrek mobiles were not duplex. In my first two conversions I used small hardline to replace the coax entirely, but maybe this is not necessary? Thanks Bruce, ve1ii 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 the Yahoo! Terms of Service.
Re: [Repeater-Builder] Free Preamp Encloser.
- Original Message - From: Tedd Doda [EMAIL PROTECTED] To: Repeater Repeater-Builder@yahoogroups.com Sent: Wednesday, March 24, 2004 10:24 AM Subject: [Repeater-Builder] Free Preamp Encloser. Hi Guys: Does anyone have any use for a well heatsinked preamp encloser? The active devices are shot, but the box, connectors (SMA) and heatsink may come in handy. Just cleaning out some future projects which never became a reality :) Some pictures: http://www.sentex.ca/tedds_place/preamp-1.jpg http://www.sentex.ca/tedds_place/preamp-2.jpg http://www.sentex.ca/tedds_place/preamp-3.jpg All I ask for is the shipping costs...US$6.00 to anywhere in Canada and the lower 48. Paypal ONLY..I really get tired of the money orders that never show up. Tedd Doda, VE3TJD Lazer Audio and Electronics Baden, Ontario, Canada 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/
Re: [Repeater-Builder] Free Preamp Encloser.
Sorry about that last message from me hit send b4 I typed anything else! :-( Tedd I would be interested in getting that enclosure from you. Please send info re payment directly to me. [EMAIL PROTECTED] Thanks, bruce, ve1ii - Original Message - From: Tedd Doda [EMAIL PROTECTED] To: Repeater Repeater-Builder@yahoogroups.com Sent: Wednesday, March 24, 2004 10:24 AM Subject: [Repeater-Builder] Free Preamp Encloser. Hi Guys: Does anyone have any use for a well heatsinked preamp encloser? The active devices are shot, but the box, connectors (SMA) and heatsink may come in handy. Just cleaning out some future projects which never became a reality :) Some pictures: http://www.sentex.ca/tedds_place/preamp-1.jpg http://www.sentex.ca/tedds_place/preamp-2.jpg http://www.sentex.ca/tedds_place/preamp-3.jpg All I ask for is the shipping costs...US$6.00 to anywhere in Canada and the lower 48. Paypal ONLY..I really get tired of the money orders that never show up. Tedd Doda, VE3TJD Lazer Audio and Electronics Baden, Ontario, Canada 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/
