If you are getting crystals made in 7 days they are going to be green and they will move all over the place until they finish growing and then they stabilize themselves. They will also move off- frequency with temperature changes. Butch
From: "K. Venkataramanan" <[EMAIL PROTECTED]> Reply-To: [email protected] To: [email protected] Subject: Re: [Repeater-Builder] Mitrek Date: Sun, 19 Dec 2004 16:58:46 +0530 Hi Mike Thanks. Our frequencies are not same as US. We are confined to 434-438. So I cannot expect availability of crystals / channel elements in this range. Of course they may be useless in the US. The local manufacturer of crystals can supply me with whatever I need within 7 days and that too for a cost under $3 but I need to specify the parameters - that is less than what it will cost for mere postage from the US!!. I do not think any one in India has even seen a Mitrek. So it becomes important to be able to specify. Of course I can just blindly specify 3rd overtone crystal - series resonant and see what happens. Then I could alter parameters after I see what it does. Even if I have to waste a couple of crystals is no big deal compared to the hassle of ordering and getting the xtals from US. If I get hold of the manual including the schematics I can make a more intelligent guess looking on the channel element circuit diagram. There is a ham in Bangalore who used to work for Motorola and I hope he will be able to hunt out some information. I thought someone in the US has a clue!! Are there service manuals around - could one beg, borrow or steal one ? Thanks for your help. 73s Venkat VU2KV At 03:51 AM 19/12/2004, you wrote: >I may be able to help, but it will take a day or two... > >While I make a couple of phone calls, Venkat what >frequencies do you need? > >Maybe someone on this group has them in their box of >elements left over from their amateur radio conversions. > >Of maybe someone has a leftover set of UHF commercial >elements with good crystals that are near his frequency and >can send them to Venkat. >His supplier could take those crystals, plug them into a test >circuit and determine the parameters by what loading is >needed to pull the test crystals onto the indicated frequency. > >Mike WA6ILQ > > >At 02:05 PM 12/18/04, you wrote: > > >I glanced at the call and thought it was a Canadian one. Ooops. > >I forget that world wide web means just that. Too used to thinking > >there's just North Americans on the list for some foolish reason. > > > >Chuck > >WB2EDV > > > >----- Original Message ----- > >From: "Paul Kelley" <[EMAIL PROTECTED]> > >To: <[email protected]> > >Sent: Saturday, December 18, 2004 4:58 PM > >Subject: Re: [Repeater-Builder] Mitrek > > > > > Me too, but we live in the U.S.! I suspect living in India > > > gives one a very different perspective on that. I hope > > > someone can help Venkat with the xtal info. (Maybe someone > > > already has... I was only partially following the topic > > > since I don't have the requested info.) > > > > > > Paul N1BUG > > > > > > > > > On Saturday 18 December 2004 04:42 pm, Chuck Kelsey wrote: > > >> With all due respect, if the crystal manufacturer cannot > > >> make a crystal for a Mitrek with just the channel element > > >> part number, I'd seriously be looking for a different > > >> supplier. > > >> > > >> Chuck > > >> WB2EDV > > >> > > >> ----- Original Message ----- > > >> From: "krmvsjr" <[EMAIL PROTECTED]> > > >> To: <[email protected]> > > >> Sent: Saturday, December 18, 2004 6:01 AM > > >> Subject: [Repeater-Builder] Mitrek > > >> > > >> > Can anyone tell me details of crystal specifications > > >> > for UHF mitrek. I am getting a T44JJA390DK and would > > >> > like to replace the crystals for local frequencies. I > > >> > would like to get confirmation that the crystals are > > >> > 3rd overtone crystals - series resonant - 32pf capacity > > >> > - (freq =10.7 / 9 for RX) I do not know the freq > > >> > multiplication for TX crystal. There is a local > > >> > crystal manufacturer who can supply xrystals if the > > >> > operating parameters are specified. Can anywho has a > > >> > the service manual make me a copy ? Venkat VU2KV > > > > > > >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/
