Has anyone on the 'Zed worked with Celwave mobile style duplexers? I have one that appears to be a 6-cavity unit. (see below) The tag on it says; Cat No: 01-83496R03 Serial #: 02-21E-87 From postings on Repeater Builder, it appears to be a Model 633-6A. Does anyone know where I can pick up some specs on this unit, perhaps a PDF of tuning instructions? From what I can tell from the construction, it seems to be a notch style duplexer. I'm wondering what the limits are on the device. I would like to see if it would do 449.9 on one port and 433.5 on the other.