On 8 January 2015 at 03:06, wrote: > It's here: > http://www.tubebooks.org/technical_books_online.htm > Mark Jordan > > Many thanks Astounding! The most amazing collection of vacuum tube era documentation I've ever seen= .. Russell --=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 .