video cable combination

From: Stooble (stooble_at_stoobletown.com)
Date: 06/04/04 

Date: Fri, 04 Jun 2004 23:58:23 GMT

I want to combine two component video sources into a projector.

I could use a switch but since only one component video source will be
powered up at any one time could I buy 3 rca y female splitters and combine
the 2 sets of component cables into one output.

Would such an approach cause an impedence mismatch and problems or could it
work ok