Depends on the kit you're running. A Hytera RD985 DMR/Analog mixed-mode duplexer is 2RU in height and the duplexer (a diplexer is a different thing) is interna

Depends on the kit you're running. A Hytera RD985 DMR/Analog mixed-mode duplexer is 2RU in height and the duplexer (a diplexer is a different thing) is internal if you buy the fitting kit. I have a Raycom analog repeater which is 1RU, including the internal duplexer and a basic repeater controller. If you want to use a beer-keg duplexer then yes, that'll cost more rackspace. Probably another 5-6RU. And if you insist on running an old, obsolete Motorola analog repeater (say, a Eurobase), you're into 3RU to start, plus the duplexer (the Moto standard ones of that era are usually 2-3RU).