I have a 1945 American printing of the 1940 third edition, the section you quoted is in part three of chapter 16 in mine. It's a good book and worth reading. Good google-fu finding that, Russell! Friendly regards, Bob On Wed, Jan 7, 2015, at 02:04 AM, RussellMc wrote: > That ref was Chapter 11 of 4th edition (1952) of Radiotron Desgners > Handbook. > 1422 Pages >=20 > Scanned good quality copy b chapter here >=20 > http://www.paleoelectronics.com/RDH4/ >=20 > TOC here >=20 > http://www.paleoelectronics.com/RDH4/TOC.PDF >=20 > Links elsewhere t full version in one file are broken. > If anyone finds full copy in 1 file please advise url >=20 >=20 > Russell --=20 http://www.fastmail.com - Access your email from home and the web --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .