I am fairly new to the list but have been playing with several magnets =
over the last few weeks. I currently have a segmented cow magnet =
consisting of 5 rings about 3/4" dia by 1/2" thick and seperated by iron =
washers. After many tries I have concluded that moving several of the =
washers from between the rings to the end of the magnet in the coil will =
give the best performance. I have also placed a speaker magnet on its =
back with the center pole attracting the end of the cow magnet and =
directly below the end of it. This has also improved performance but it =
may be due to the added weight on the magnet stand. My coil is 1# of =
#34 wire in about a 2" coil formed by epoxy and fiberglass cloth tube =
with plywood end plates. =20
Does anyone else have a floating slab construction under a Lehman? I =
have noticed that I seem to get better coupling to the ground by placing =
the sensor near a load bearing wall and also less disturbance from =
walking nearby. I also seem to have blind spots to quakes from the NW =
and SE directions and better reception to the SW. I have the boom E-W =
with the pivot to the W. =20
Finally, I have placed a few of my first quakes at =
http://home.sprintmail.com/~randallpratts Feel free to educate me on =
what I have done.
Randy
I am fairly new to the list but have been playing =
with several=20
magnets over the last few weeks. I currently have a segmented cow =
magnet=20
consisting of 5 rings about 3/4" dia by 1/2" thick and seperated by iron =
washers. After many tries I have concluded that moving several of =
the=20
washers from between the rings to the end of the magnet in the coil will =
give=20
the best performance. I have also placed a speaker magnet on its =
back with=20
the center pole attracting the end of the cow magnet and directly below =
the end=20
of it. This has also improved performance but it may be due to the =
added=20
weight on the magnet stand. My coil is 1# of #34 wire in about a =
2" coil=20
formed by epoxy and fiberglass cloth tube with plywood end plates. =
Does anyone else have a floating slab construction =
under a=20
Lehman? I have noticed that I seem to get better coupling to the =
ground by=20
placing the sensor near a load bearing wall and also less =
disturbance from=20
walking nearby. I also seem to have blind spots to quakes from the =
NW and=20
SE directions and better reception to the SW. I have the boom E-W =
with the=20
pivot to the W.
Finally, I have placed a few of my first =
quakes at http://home.sprintmail.com/~randallpratts =20
Feel free to educate me on what I have done.
Randy