11691D and 11692D Directional Couplers to be discontinued June 1, 2009 Agilent will discontinue the sale of the 11691D and 11692D direction couplers on June 1, 2009. The support life will end on May 31, 2012. The recommended replacement for the 11691D is 773D and the 772D replaces the 11692D. The 773D and 772D provide comparable specifications at a lower cost, but with a slightly different look and dimension. Contact Agilent for more information on these replacement products.