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Hey there, Dave here, the old codger!!! I solder n scale track and ho track for a friend. I also taught soldering to Mil-Spec for the air force for 5 years. 1. Use an iron, not a gun. I recommend a weller princess 60 watt with a 1/16" flat tip. The iron is thermostatically controlled for a tip temp of 700 degrees. 2. Use eutectic solder (Sn63/Pb37) It will melt at the lowest temperature and has no plastic state, it is either liquid or solid, period. 3. I use a liquid rosin flux, comes in a bottle, and helps the solder flow better, and at a lower temperature. 4. If you use this setup, you shouldn't have to remove ties, etc. because you will be applying heat for a very short time. Of course the ideal mathod would be to use a conductive tweezer setup, but they cost over 200 bucks. They only heat the work that the tweezers are actuallt grabbing at the time. DO NOT try to solder track with a 15 watt iron, by the time the rail is hot enough to solder, you will have damaged ties. You iron should be 60 watts. I don,t like soldering guns because the heat on them is not real consistent. Make sure your iron tip is well tinned, (has shiny solder on it) for optimum heat transfer. Hope this helps, Dave
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