From a reply on FB<\/p>\n
I built a speaker for a swimming pool. It was a large can of steel with an audio transformer mounted inside. The ‘I’ laminations were removed so the ‘E’ laminations could be very close to the end. I drove it with a 2N3055 on a heatsink. The secondary winding must have DC flowing to magnetize the laminations. I used a car battery for power.<\/p>\n
I soldered the lid back on the can. I put clear silicone sealant around the lid where the two wires went through. It worked okay for awhile but the water leaked in and the steel rusted. <\/p>\n","protected":false},"excerpt":{"rendered":"
From a reply on FB I built a speaker for a swimming pool. It was a large can of steel with an audio transformer mounted inside. The ‘I’ laminations were removed so the ‘E’ laminations could be very close to the end. I drove it with a 2N3055 on a heatsink. The secondary winding must <\/p>\n (Read More…)<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,8],"tags":[],"class_list":["post-12247","post","type-post","status-publish","format-standard","hentry","category-magnetics-electromagnetics","category-audio"],"_links":{"self":[{"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/12247","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=12247"}],"version-history":[{"count":3,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/12247\/revisions"}],"predecessor-version":[{"id":12258,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/12247\/revisions\/12258"}],"wp:attachment":[{"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=12247"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=12247"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=12247"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}