Don’t know if this Rev 5 is the latest as Larry made some value changes over time. www.mtmscientific.com/preamp.pdf Steve WB6RSE On Aug 28, 2015, at 10:12 AM, Jeff Kincaid <w6jk at sbcglobal.net> wrote: Now that we've all retested the broken link, does anyone have a copy of the pdf? 'JK