Yes, and the switch from 15 kHz (wideband) to 5 kHz (narrowband 20K0F3E) was simple compared to the "new" narrowband 11K2F3E emission, which has specific emission masks that are mandatory.
73, Eric Lemmon WB6FLY -----Original Message----- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Chuck Kelsey Sent: Friday, August 27, 2010 12:32 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Can a Master 3 narroband I'm guessing it was permitted back then. Chuck WB2EDV ----- Original Message ----- From: "MCH" <m...@nb.net <mailto:mch%40nb.net> > To: <Repeater-Builder@yahoogroups.com <mailto:Repeater-Builder%40yahoogroups.com> > Sent: Friday, August 27, 2010 3:26 PM Subject: Re: [Repeater-Builder] Can a Master 3 narroband > How did they handle this back in the 60s/70s when I remember seeing > "Adjusted for narrowband +/- 5 kHz" stickers on the radios? Were those > factory stickers? > > Joe M. > > Eric Lemmon wrote: >> Tom, >> >> The "narrowbanding kit" produced by Communications Specialists and others >> is >> for the receiver section, and does not affect the transmitter section. >> The >> emission mask specified by the FCC for mandatory narrow band operation >> must >> be incorporated by the equipment manufacturer and then tested by an >> FCC-approved agency. This process has never been in the hands of the >> owner >> or user, despite widespread popular belief to the contrary. Simply >> reducing >> the deviation to a lower setting does not magically make a transmitter >> narrow band compliant; the limiting circuitry must be modified as well. >> Moreover, the FCC Type Acceptance for both the MSR2000 and the Mitrek >> does >> not include narrow band (11K2F3E) emissions. Naturally, these >> requirements >> apply only to commercial usage under Part 90 Rules. >> >> 73, Eric Lemmon WB6FLY >> >> >> -----Original Message----- >> From: Repeater-Builder@yahoogroups.com <mailto:Repeater-Builder%40yahoogroups.com> >> [mailto:Repeater-Builder@yahoogroups.com <mailto:Repeater-Builder%40yahoogroups.com> ] On Behalf Of Tom Manning >> Sent: Friday, August 27, 2010 10:57 AM >> To: Repeater-Builder@yahoogroups.com <mailto:Repeater-Builder%40yahoogroups.com> >> Subject: Re: [Repeater-Builder] Can a Master 3 narroband >> >> >> >> Hello Jim >> I note your message about narrowbanding and the comment about the >> MSR2000. I have seen no info on doing so but it seems to me that the >> MSR200 >> could be narrowbanded. The MSR is very similar to the Mitrek and it can >> be >> narrowbanded by using a kit by a company that slips my mind. Therefore I >> feel narrowbanding would be possible. I will be attempting this in six >> months or so. 73 de Tom Manning, AF4UG >> >> ----- Original Message ----- >> From: Jim in Waco WB5OXQ <mailto:wb5...@grandecom.net <mailto:wb5oxq%40grandecom.net> > >> To: Repeater-Builder@yahoogroups.com <mailto:Repeater-Builder%40yahoogroups.com> >> Sent: Friday, August 27, 2010 10:07 AM >> Subject: [Repeater-Builder] Can a Master 3 narroband >> >> >> >> >> I have a uhf master 4 that has been used for years as a paging >> exciter. Now the pager business is in the tank I would like to make the >> master 3 into aq repeater for commercial needs to replace a msr2000 >> because >> the msr cannot narroband. If the ge can't either I dont want to waste >> time >> and just buy a new repeater that can narroband. >> wb5...@grandecom.net <mailto:wb5oxq%40grandecom.net> >> >> >> >> >> >> >> >> >> ------------------------------------ >> >> >> >> Yahoo! Groups Links >> >> >> >> >> ---------------------------------------------------------- >> >> >> Internal Virus Database is out of date. >> Checked by AVG - www.avg.com >> Version: 9.0.783 / Virus Database: 271.1.1/2746 - Release Date: 03/14/10 >> 03:33:00 >> > > > ------------------------------------ > > > > Yahoo! Groups Links > > > ---------------------------------------------------------- No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.851 / Virus Database: 271.1.1/3097 - Release Date: 08/27/10 02:34:00
