I've just started building my QMX+ kit and what I found was that I needed an indicated temperature of 440C to burn the enamel off. My normal 380C barely touched it.? I'm using a WEP 926 LED soldering station.? I'd like to use a little less and will be experimenting as the toroid saga continues.
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FTAOD this is with the 0.33mm wire supplied in the kit.
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HTH
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Chris, G5CTH