Re: [Repeater-Builder] Re: ICM Crystals Off Frequency? (More MSR-2000 stories)
Glad to be of help! I have some UHF 5PPM 1088A's which also work in the VHF Mitreks and MSR2000's (just one less tripler stage in the exciter)... $3.00 each plus a token amount for shipping, if you're interested. George, KA3HSW / WQGJ413 -Original Message- >From: Robin Midgett <[EMAIL PROTECTED]> >Sent: Mar 15, 2007 4:39 PM >To: Repeater-Builder@yahoogroups.com >Subject: Re: [Repeater-Builder] Re: ICM Crystals Off Frequency? (More >MSR-2000 stories) > >Bingo! >Thanks George. That is exactly what happened. Apparently if I can >find a set (actually a pair; main & back up) of the 5PPM elements I >will be in good shape. > > >At 01:43 PM 3/15/2007, you wrote: >>When you ordered the crystals, did you specify that they were for a >>1095A element? If ICM assumed that they were for a 1088B (.0005%), >>that might account for the difference maybe... maybe not ? >> >>George, KA3HSW / WQGJ413 >> >> >> >>-Original Message- >> >From: Robin Midgett <[EMAIL PROTECTED]> >> >Sent: Mar 15, 2007 2:43 PM >> >To: Repeater-Builder@yahoogroups.com >> >Cc: [EMAIL PROTECTED] >> >Subject: Re: [Repeater-Builder] Re: ICM Crystals Off Frequency? >> (More MSR-2000 stories) >> > >> >Hi Skipp, >> >I've looked and not found such an adjustment. The RBTI page shows a >> >hidden variable inductor, but that isn't the element I have. The >> >element I have is labeled KXN1095A; maybe that's not what I have, but >> >that's the label on it. >> >This element has the IDC adjustment, and one variable inductor for >> >frequency adjustment. There's an access hole in the top of the >> >element cover for each. >> > >> >> >> >> >> >>
Re: [Repeater-Builder] Re: ICM Crystals Off Frequency? (More MSR-2000 stories)
Bingo! Thanks George. That is exactly what happened. Apparently if I can find a set (actually a pair; main & back up) of the 5PPM elements I will be in good shape. At 01:43 PM 3/15/2007, you wrote: >When you ordered the crystals, did you specify that they were for a >1095A element? If ICM assumed that they were for a 1088B (.0005%), >that might account for the difference maybe... maybe not ? > >George, KA3HSW / WQGJ413 > > > >-Original Message- > >From: Robin Midgett <[EMAIL PROTECTED]> > >Sent: Mar 15, 2007 2:43 PM > >To: Repeater-Builder@yahoogroups.com > >Cc: [EMAIL PROTECTED] > >Subject: Re: [Repeater-Builder] Re: ICM Crystals Off Frequency? > (More MSR-2000 stories) > > > >Hi Skipp, > >I've looked and not found such an adjustment. The RBTI page shows a > >hidden variable inductor, but that isn't the element I have. The > >element I have is labeled KXN1095A; maybe that's not what I have, but > >that's the label on it. > >This element has the IDC adjustment, and one variable inductor for > >frequency adjustment. There's an access hole in the top of the > >element cover for each. > > > > > > > > >Yahoo! Groups Links > > > Thanks, Robin Midgett K4IDC 615-322-5836 office - rolls to pager 615-835-7699 pager 615-301-1642 home [EMAIL PROTECTED] http://www.people.vanderbilt.edu/~robin.midgett/index.htm
Re: [Repeater-Builder] Re: ICM Crystals Off Frequency? (More MSR-2000 stories)
When you ordered the crystals, did you specify that they were for a 1095A element? If ICM assumed that they were for a 1088B (.0005%), that might account for the difference maybe... maybe not ? George, KA3HSW / WQGJ413 -Original Message- >From: Robin Midgett <[EMAIL PROTECTED]> >Sent: Mar 15, 2007 2:43 PM >To: Repeater-Builder@yahoogroups.com >Cc: [EMAIL PROTECTED] >Subject: Re: [Repeater-Builder] Re: ICM Crystals Off Frequency? (More >MSR-2000 stories) > >Hi Skipp, >I've looked and not found such an adjustment. The RBTI page shows a >hidden variable inductor, but that isn't the element I have. The >element I have is labeled KXN1095A; maybe that's not what I have, but >that's the label on it. >This element has the IDC adjustment, and one variable inductor for >frequency adjustment. There's an access hole in the top of the >element cover for each. >
Re: [Repeater-Builder] Re: ICM Crystals Off Frequency? (More MSR-2000 stories)
Hi Skipp, I've looked and not found such an adjustment. The RBTI page shows a hidden variable inductor, but that isn't the element I have. The element I have is labeled KXN1095A; maybe that's not what I have, but that's the label on it. This element has the IDC adjustment, and one variable inductor for frequency adjustment. There's an access hole in the top of the element cover for each. At 10:01 AM 3/15/2007, you wrote: >Hi Robin, > >There is a range adjustment under the cover of In/on some msr-2000 & >mitrek channels. You simply need to range the coarse adjustment >within the ball park. > >Also know the crystals will age and change a bit over the first few >months of operation. > >Some people cut open the channel element top to expose the coarse >range adjustment but I've never bothered. Just know the channel >element cover being on or off will change the output Frequency >quite a bit. So you need to ensure the alignment is checked with the >cover in place. > > >Funny... I had this same problem the last time I bought ICM rocks. >But I don't have this problem when using Bomar crystals. Both >brands of crystals work very well... I just like Bomar's much cheaper price. > >cheers, >skipp > > > Robin Midgett <[EMAIL PROTECTED]> wrote: > > Either I'm missing something or ICM sent me defective crystals. > > I ordered two pairs of crystals to put a MSR-2000 repeater on 147.105 > > Tx / 147.705 Rx. I've tried both Tx crystals in the KXN1095A channel > > element only to find the frequency to end up ~36kHz. high. The > > crystal itself is putting out energy at 12.26180 MHz.; it should be > > 12.25875 MHz. The bag label indicates them to be cut for 12.25875, > > but they don't oscillate at (barely even near) that frequency. > > Should I have to pad the new crystals with a cap to net them on > > frequency? If so, what value? > > > > Thanks, > > Robin Midgett K4IDC > > VHF+ Glutton EM66se > > > > > > > > >Yahoo! Groups Links > > > Thanks, Robin Midgett K4IDC 615-322-5836 office - rolls to pager 615-835-7699 pager 615-301-1642 home [EMAIL PROTECTED] http://www.people.vanderbilt.edu/~robin.midgett/index.htm
