--- In Repeater-Builder@yahoogroups.com, Roger Grady <[EMAIL PROTECTED]> wrote: > > At 12:29 PM 12/19/2005, Coy Hilton wrote: > > >It may sound interesting (and cheap) but the reason that no one else > >has suggested it is because the impedance miss matches it causes. > >That is why you need something like a multicoupler whis is first a > >pre amp to keep the loss to a minimum then sends the pre amp to a > >splitter that maintains the 50 ohm match required by the receivers > >on each output port. > > You can handle the impedance matching by using 1/4 wave sections of 75 ohm > coax between the receiver input and the T. The 1/4 wave 75 ohm section > steps the 50 ohm receiver input impedance up to 100 at the other end, two > of those in parallel at the T gets you back to 50 to match the feedline. > Any number of receivers other than 'powers of 2' is more complicated. This > does nothing for the loss of course. > > Roger Grady K9OPO >
It's called a Wilkinson splitter. Here is a link to some of the theory. http://www.microwaves101.com/encyclopedia/Wilkinson_splitters.cfm 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/
