S. Thought well taken...........I'll just reduce dev......All DoD around Seattle/Tacoma has gone to 400mHz. trunking, so I doubt there are going to be any "Neighbors" around my AFMARS frequency!
Thanks, de Tim W7TRH / AFA5TP -------------- Original message ---------------------- From: "skipp025" <[EMAIL PROTECTED]> > 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. > > > > > > > >
--- Begin Message ---
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: <Repeater-Builder@yahoogroups. >com
> > 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.
> >
>
--- End Message ---
