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I was wondering if there is anything I need to be concerned about in regards to using a step-down transformer to power my Weller WES51 soldering iron which is rated at 110V in the UK (mains is 240V in UK).

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    \$\begingroup\$ just make sure to have the power rating of the device less than the transformer. i think weller doesnt have fuse on their primary input so maybe you can take care of that. if you want. \$\endgroup\$ – Hasan alattar Feb 5 '19 at 8:42
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    \$\begingroup\$ ...weller doesnt have fuse on their primary input indeed, as discovered by Dave of the EEVBlog connecting his 120 V Weller to 240 V: youtube.com/watch?v=8itTKH5tj3s Your WES51 also doesn't appear to have a primary fuse so make sure you never connect it to 240 V. \$\endgroup\$ – Bimpelrekkie Feb 5 '19 at 8:56
  • \$\begingroup\$ Is the weller good with a 50Hz supply? if not you might need to go with 100V instead of 120 and take a 40% performance hit, \$\endgroup\$ – Jasen Feb 5 '19 at 8:58
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Make sure the output current rating of the step-down transformer is higher than what your station consumes.

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