I have it on good advice from Lloyd Alcorn at Wacom Products (RIP Wacom) that Black Magic is involved.
Steve In a nutshell, the cavities are either 1/4 or 3/4 wavelength with coupling loops oriented for a particular degree of coupling, and also the length affects coupling. Some cavities use 2 loops in band pass configuration, and some use one loop for band pass / band reject configuration. Cable lengths plus coupling loop length are set for 1/4 wavelength taking into account velocity factor of the cables and connector length. Interstage cable length has large impact on loss. Get everything just right and it might work. 73, Steve NU5D Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/