PSN-L Email List Message
Subject: Re: Mini Lehman Damping
From: JAMES RIDOUT jamesridout@..............
Date: Thu, 12 Jun 2008 06:55:58 +0100 (BST)
Hi,
This is a link to a picture of my mini lehman, It is one I made from bits of scrap aluminium
from work. It has a NeFe 3/4" x 1.5" magnet inside a coil of 6000 turns of 0.18mm
enamelled copper wire, coupled directly to a chart recorder on the 50Mv setting NO amplification or filters ( is this wrong????). I pick up constant microseisisms all the time
at about 5 secs period. The unit I have managed to tune to 15 seconds, and still be
quite stable.
James
http://www.freewebs.com/jridout/apps/photos/photo.jsp?photoID=7080078
Hi,
This is a link to a picture of my mini lehman, It is one I made from bits of scrap aluminium
from work. It has a NeFe 3/4" x 1.5" magnet inside a coil of 6000 turns of 0.18mm
enamelled copper wire, coupled directly to a chart recorder on the 50Mv setting NO amplification or filters ( is this wrong????). I pick up constant microseisisms all the time
at about 5 secs period. The unit I have managed to tune to 15 seconds, and still be
quite stable.
James