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Thanks for the info BF.I'm concerned about the heat from a conventional soldering iron. I have a low wattage iron but I still fear what it may do to the ties.I'm thinking of building a resistive type iron and trying that. There are some web pages that discribe how to build one and they all call for a different rated transformer. They call for anything from a 1 1/2 to 8 amp rated transformer. I have built a power supply for a foam cutting hot wire. The transformer I used is rated at 2 amp and I was wondering if that is large enough.Anyone have any thoughts
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