Bill, That was the info that I needed. It is so nice to have all of the help that everyone on this site offers up.
Mine is a 4 cavity T4085A 430-470 unit designed for the 3 MHz and wider split. I have not done any more work on it due to work and getting ready for the family to appear for the Holidays. The high pass/low reject side works perfectly, it is the low pass/high reject side that will not tune properly. I think I am going to have to drill out the pop rivets holding everything together and see if I see any problems inside the cans. Just needed to verify exactly what I was working with before I started the dis-assembly process. If it worked once, it can be made to work again. Thanks, Joe --- In Repeater-Builder@yahoogroups.com, "Bill Hudson" <w6...@...> wrote: > > > > There you go Joe! The man with all the answers! That sounds like the exact > situation you have! > > > > Good work on that info! > > > > Now I'll have to go back and see what the deal was with the duplexer we had > here! > > > > Bill - W6CBS > > > > _____ > > From: Repeater-Builder@yahoogroups.com > [mailto:repeater-buil...@yahoogroups.com] On Behalf Of nj902 > Sent: Wednesday, December 03, 2008 2:02 PM > To: Repeater-Builder@yahoogroups.com > Subject: [Repeater-Builder] Re: Motorola Duplexer Info Needed > > > > The technical data for the UHF MSR2000 duplexers is contained in a > section of the UHF station manual, 68-81061E55, behind the "OPTIONS" > tab. > > This section was not included in the original -O release of the > manual but is definitely in newer manuals such as the -C version. > > The MSR2000 duplexer family consists of several 2 and 4 cavity > models covering the frequency range from 406-520 MHz. The same > TRN9041A cavities are used in all of the models, thus the mechanical > construction of the cavities should not be a factor in your issue. > > Different antenna and interconnect cable sets are used for each of > the three frequency ranges: 406-430 MHz, 430-470 MHz, and 470-520 > MHz. > > The 4 cavity T4085A models operate at T-R spacings of greater than 3 > MHz whereas the T5002A models are configured for separations between > 2 and 3 MHz. These use a different set of coupling loops than the > T4085A. > > The maximum input power specification for these duplexers is 250 > Watts. > > ---------------------------------------------------------- > > --- In Repeater-Builder@ <mailto:Repeater-Builder%40yahoogroups.com> > yahoogroups.com, "Joe Burkleo" > <joeburkleo@> wrote: > > "I have a Motorola 4 can duplexer out of a UHF MSR2000 series radio > that is the pass/notch style. ... > > I can not find any info on this unit ..." >
