Yes, definitely good quality rosin core solder. I do keep a small bottle of liquid rosin flux because I add it to the desoldering braid when needed. I have an old Radio Shack 50 watt adjustable soldering iron. I run it at the full 50 watts on these kits. I would look for something like it to replace it when I need a new one. Another indispensable item, at least for me, is a binocular magnifying headset.??
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73, Dan - W2DLC
Daniel Conklin