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 [email protected], "Joe Burkleo" <[EMAIL PROTECTED]> 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 ..."
