🚀 go-pugleaf

Several years ago I but some energy into researching a particular
"brand" of magnetic levitation and did not really get the answers 
that I was looking for.  Maybe someone on the net can point me in
the right direction.

I would like to magnetically levitate an object by using only apparatus
which is underneath the object to be levitated.  The object to be 
levitated, therefore, must not require wires to be connected to it
or a pole to run up though the center of it.  The demonstrations that 
I have seen always have a pole or rod going up through the center in order
to keep them from "falling off" the magnetic field.

Any pointers on where to find information on this subject would be
greatly appreciated.  

I attempted to build such a device about 4 years ago using a large
electro-magnet fed with ordinary (U.S.) household A.C. (60 hz, 120V).
I tried levitating several types of materials - metal washers, disks,
etc made of several different materials but nothing worked (i.e. no
repulsive effect was observed).

Specific Questions:

1. What is the correct material to use for the levitated metal?
2. What is the correct material to use, if any, for the electro-magnet
core?
3. What is the optimum frequency to use for alternating the magnetic
field?
4. Will this approach work at all (maybe this should be question 1 :-)?

Reply to the net if you wish, however to save bandwith I will be happy
compile Email responses and post a follow-up to the net.

Thanks for your assistance.

Jimmy
jru@Comtech.com