Hi Tim, Do yourself a big favor and don't change or touch the xtal filters in your/the MSR-2000 Receiver.
In the real world you need only reset the proper levels after cranking down the tx deviation pot and you'll find the MSR-2000 to pretty much already be able to operate narrow band. The factory filters in the receiver are already pretty darn tight/narrow. Other than levels you are probably not going to be bothered by narrow band adjacent channel operation at most typical locations. "What you gain by replacing the xtal filters is also what you lose by replacing the (same) xtal filters". In other words... unless you have a real specific reason to retrofit the MSR-2000 Receiver Xtal Filters... don't replace them to be able to check off some paper that says they are narrow band compliant. The Evil Eye of Fire in Narrow-Banding (aka Sauron of Mordor) doesn't care nearly as much about your receiver filter Window/band-pass. The Ring Carrier (Frodo) is the Transmitter deviation (modulation and signaling) Move on to other the issues and you'll be much happier you didn't train-wreck the receiver. cheers, s. (Gandalf) > [EMAIL PROTECTED] wrote: > > That is Good News! I'll get with Comm Spec. and take a look! This rpt. has been running flawlessly for over 12 yrs! It is part of the family. If those filters will make it compliant w/ the narrow banding regs, then I shall celebrate! Thanks for your valuable input! > > 73's de Tim W7TRH / AFA5TP Wa. > -------------- Original message ---------------------- > From: "George Henry" <[EMAIL PROTECTED]> > > An MSR-2000 shouldn't be difficult to narrow-band... Communications > > Specialists sells a kit of narrow crystal filters to fit it. I've already > > done one Mitrek and a Johnson PPL6060. > > > > George, KA3HSW / WQGJ413 > > > > > > ----- Original Message ----- > > From: <[EMAIL PROTECTED]> > > To: <[email protected]> > > Sent: Wednesday, November 07, 2007 4:47 PM > > Subject: Re: [Repeater-Builder] Re: Need preamp card for MSR 2000 > > > > > > > You bet Skipp! That would be the way to go. I really did not see much > > > improvement, except maybe a little more internod!! My MSR 2000 has been > > > running for twelve years trouble free. Have reduced power to about 90 > > > watts. It is going to be a sad day when the "Narrow Banding" takes place, > > > as it is on a USAF MARS fx., and we fall under the new regs!! I guess I > > > will have to convert to 2m HAM, and re tune the Waccom Duplexers!! 73's DE > > > TIM W7TRH/AFA5TP Vashon Wa. > > >
