To anyone who wishes to help: Is 18" too tall for the main support with the Lehman? Has anyone used a piece of threaded rod for the boom, or is it better to stick with an aluminum dowel, say 1/2" in dia. ? Is the angle of the boom support wire, in relationship to the boom, a critical item, or is it just desirable to keep it somewhere around 30 degrees? Thanks, and sorry for the elementary questions. Jim Martin New Haven, Indiana _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L)
Larry Cochrane <cochrane@..............>