will placing magnets in repel mode will demagnetize them.

[grogmark]

ok I think I see what you mean, if the mangets are the same size and stength, and Ballanced they will not lose stength? that's all I was trying to find out.

I was watching an agument on this subject else where on this forum and it disageement confused me.

this is all I knew about about magnet live before I talked to you.

 that they have I life of hundreds of years in attaction mode.

 and with so many people talking about magnets losing thier stength much faster in repel mode I wondered what life span to expect in this configuration.

 since magnets have a much more powerful interaction in repel mode I thought it was reasonable to expect a shorter life.

you've convinced me, I'll drop it now
thanks for taking the time to set me straight
mark

[d3adp00l]

generally speaking alinco magnets in repel mode won't lose strength so much as the fields will warp and push around, this takes many years from my experience. Some of my assemblies that have sat for 6+ years have warped. In basic terms think  like innertia the fields will hold their strength (if not in contact with ferrous metals) and fields will tend to stay put, until they start to move and when they start to shift they shift fast and faster, until they can achieve a lowest energy configuration. So unless you plan on leaving them for a relatively long time, no worries.
I haven't seen neos warp like alincos, yet.. Give it a couple more decades.