Gene, you are right for an H4 mag, as it has an Alnico magnet which is an alloy of iron, aluminium, nickel, and cobalt. It has a high coercivity (resistance to loss of magnetism), so they rarely require the magnet to be recharged. The E4A and F4 (both use the same magnet), which is a hard iron magnet, DOES need to be recharged on occasion. IHC actually had a standard magnet charger as a dealer tool because of that.
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Today's Featured Article - Trenching With a Plow - by Staff. Introduction: This interesting information came from one of the discussion forums here at YT. We thought we should place it up front so it could be read by anyone interested in putting old iron to work. [Editor] I tried something new today, and it worked so well I thought I should post it - in case it might help someone else. I'm running 100 yards of 4" drain pipe from the gutter downspouts of our house to a pond down the hill. This should hel
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