Trivia provided by bob WB9UKQ Out in the shed I have a 1 1/2 # soldering iron (properly called a soldering copper) that used to be heated by a blow torch. That believe you me provides plenty of heat to heat any joint. Can be also used to solder pails, barrels commutators etc. Doubt that you would want to carry it to the top of a tower tho. Very SOC equipment.