you can get China-made variable transformer for 1/10nth the price
https://www.ebay.com/itm/184465797517?chn=ps&_trkparms=ispr%3D1&amdata=enc%3A1B-desg9PRCGIPQC2Kxfh-Q61&norover=1&mkevt=1&mkrid=711-213727-13078-0&mkcid=2&itemid=184465797517&targetid=4580702890871448&device=c&mktype=&googleloc=&poi=&campaignid=418640321&mkgroupid=1233652283797640&rlsatarget=pla-4580702890871448&abcId=9300602&merchantid=51291&msclkid=371f7d3fa6a01d6094091c0461bc8ec0
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