No harm - no foul, Tom! ;-) Mark- N9WYS
-----Original Message----- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of wb6dgn Sent: Monday, November 23, 2009 8:37 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Re: MSF5000 internal 14.4MHz osc. Mark, I think I duplicated your references further down. Sorry, somehow I missed your post. Too much skipping here and there instead of sticking to one thread. Tom DGN --- In Repeater-Builder@yahoogroups.com, "Mark" <n9...@...> wrote: > > Steve, > > Not sure I understand what it is you are needing... I believe you said that > you require the 14.4 oscillator. But then there was mention of the 5 MHz > OCXO. (Or was that another thread?) > > Anyway, if you have the freq reference tray but are missing the HSO > (Hi-Stability frequency reference Oscillator), ANY 5 or 10 MHz OCXO will > work. Look here for the solutions we used here in the US to get a series of > GPS-referenced, 900 MHz stations operating as stand-alone repeaters: > http://www.repeater-builder.com/motorola/msf/900-msf.html and > http://www.repeater-builder.com/motorola/msf/msf5000-conversion.html > > You'll see references to the frequency reference tray about 1/3 of the way > down in each article... The HSO normally gets installed in the open space > on the left side. > > Hope this helped. > Mark- N9WYS > > > -----Original Message----- > From: Repeater-Builder@yahoogroups.com On Behalf Of sjs1005 > > Thanks Bill for your reply and info > > There appears to be a REF OSC on the uni board, > Part id and numbers are; > > KXN1096A > 14.40000MHZ (M) > X9211 > Located top edge (opened) about halfway. Next to a seriously big can / RF > cover ? > > Its a matter of now finding out which parts to take out or add ? > > I used fix old teles and radios 25-30 yrs ago since then i have worked for > the state government in a different field. I cant even remember those days > clearly anymore !, curse of working for the govt i suppose and stuck to one > occupation. But now feel the need to catch up ! Seem to have plenty of time > these days with the kids growing up. > > I do appreciate any help, i beleive a circuit diagram would probbarly be of > the greatest assistance ? Difficult to find an UHF one. Plenty of 800-900 > mhz though, but unfotunately those bands do not have the on board REF OSC. > Motorola's (AU) position is that they now longer support these repeaters and > to give the net a try ? > > Have pictures if needed. > > Thanks all > > Steve > Sydney AU > > > > --- In Repeater-Builder@yahoogroups.com, "Bill" <jawjabillatl@> wrote: > > > > > > > > First be sure the xtal is on the board, if not you may search for a spare > uni board to transfer the parts. If the cost or time get out of control, > consider putting in a rubidium osc that can be programmed to the 14.4 mhz. > They are plentiful on ebay and some what reasonably priced. Some operate at > 15 to 18 volts. > > . > > bill > > atlanta > > . > > > > --- In Repeater-Builder@yahoogroups.com, "sjs1005" <sjs1005@> wrote: > > > > > > Hello all, > > > > > > I hope someone can help me out with a couple of msf5000s (UHF r3) > > > > > > I brought these 2nd hand from a govt department, thay are in good order. > > > > > > They are the CXB type. > > > > > > For the repeaters to fire up or lock in, they require a external 14.4Mhz > reference input. I sig gen'd a 14.4 MHz signal and sure enough they locked > in. > > > > > > I have been looking and reading a bit about these repeaters and > discovered that they have a built in 14.4Mhz motorola Osc xtal on the RF > board. This saves me building a exernal oven type osc on 14.4Mhz. > > > > > > What i need help with is reversing the external input freg and re enable > the on board 14.4Mhz osc xtal? I have searched everywhere for any specific > info on this as well for a manaul to no avail. > > > > > > Basically i need to know what resistors etc to replace or remove etc? to > fire up this osc xtal ? > > > > > > Can anyone assist me with this ? and many thanks to all. > > > > > > Steve > > > > > > > > > > ------------------------------------ > > > > Yahoo! Groups Links > > > > No virus found in this incoming message. > Checked by AVG - www.avg.com > Version: 8.5.425 / Virus Database: 270.14.78/2521 - Release Date: 11/23/09 > 07:52:00 > ------------------------------------ Yahoo! Groups Links No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.425 / Virus Database: 270.14.78/2521 - Release Date: 11/23/09 07:52:00
