robert barns wrote: > > I think that using a ball end (say 1/8" dia.) or > a disk is easier. I have put a photo of my pivot which uses a disk (about > 1 1/2" in dia.) on my web site. www.webspan.net/~bbarns > The disk simply rests on a flat brass bar. This makes it easy to position > the contact since it can be anywhere on the bar. > Many hardware stores carry 1/2" dia. aluminum rod. I think that this is > good for the boom. > Bob Barns > Bob, Went to your web site and saw the pivot. Your disk roughly resembles a glass cutter metal disk. I presume its like a washer put in a drill press collet with a bolt/nut attachment and filed down as it was spun? Meredith Lamb _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L)
Larry Cochrane <cochrane@..............>