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
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