Thanks!!!
Allen
N5WJZ
I could dig up the following
Magazine:Ham Radio, Issue February 1985, page 12-27
Book: FM and Repeaters, 1972 page 103-111 from ARRL, Library of Congres
Catalog Card number 72-96087
You could try the links:
http://www.seits.org/seits/
http://rfsolutions.com/TXRX.htm
I hope it will help.
Frans.