{"id":613,"date":"2017-08-11T10:07:55","date_gmt":"2017-08-11T08:07:55","guid":{"rendered":"http:\/\/www.ljudmila.org\/~savskib\/?p=613"},"modified":"2018-01-11T14:37:27","modified_gmt":"2018-01-11T12:37:27","slug":"real-theremin","status":"publish","type":"post","link":"https:\/\/www.turborebop.net\/?p=613","title":{"rendered":"Tapravi teremin"},"content":{"rendered":"<p>In 2017 I decided to finish building two pieces of &#8220;classic&#8221; theremin by using the two printed circuit boars that i etched five years ago. The circuit is basically the &#8220;etherwave&#8221; theremin by Robert Moog. The prototype was built and tried successfully at that time &#8211; but then the time somehow evaporated. So this now is the psycho-disciplinary action: finishing what was started &#8211; and: something to do in-between.<\/p>\n<p>I was able to do the instrument building in the workshop of <a href=\"http:\/\/www.cirkulacija2.org\" target=\"_blank\" rel=\"noopener\">Cirkulacija 2<\/a> &#8211; with all the nice machinery (and people) around.<\/p>\n<p>Theremin is one of the first electronic musical instruments &#8211; from the start developed with the music in mind. It was devised by Lev Termen in the 1920s. Further historical information is elsewhere.<\/p>\n\n\t\t<style type=\"text\/css\">\n\t\t\t#gallery-1 {\n\t\t\t\tmargin: auto;\n\t\t\t}\n\t\t\t#gallery-1 .gallery-item {\n\t\t\t\tfloat: left;\n\t\t\t\tmargin-top: 10px;\n\t\t\t\ttext-align: center;\n\t\t\t\twidth: 33%;\n\t\t\t}\n\t\t\t#gallery-1 img {\n\t\t\t\tborder: 2px solid #cfcfcf;\n\t\t\t}\n\t\t\t#gallery-1 .gallery-caption {\n\t\t\t\tmargin-left: 0;\n\t\t\t}\n\t\t\t\/* see gallery_shortcode() in wp-includes\/media.php *\/\n\t\t<\/style>\n\t\t<div id='gallery-1' class='gallery galleryid-613 gallery-columns-3 gallery-size-thumbnail'><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/www.turborebop.net\/wp-content\/uploads\/2017\/11\/CAM00848.jpg' class=\"thickbox no_icon\"><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/www.turborebop.net\/wp-content\/uploads\/2017\/11\/CAM00848-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" \/><\/a>\n\t\t\t<\/dt><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/www.turborebop.net\/wp-content\/uploads\/2017\/11\/CAM00851.jpg' class=\"thickbox no_icon\"><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/www.turborebop.net\/wp-content\/uploads\/2017\/11\/CAM00851-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" \/><\/a>\n\t\t\t<\/dt><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/www.turborebop.net\/wp-content\/uploads\/2017\/11\/CAM00856.jpg' class=\"thickbox no_icon\"><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/www.turborebop.net\/wp-content\/uploads\/2017\/11\/CAM00856-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" \/><\/a>\n\t\t\t<\/dt><\/dl><br style=\"clear: both\" \/><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon portrait'>\n\t\t\t\t<a href='https:\/\/www.turborebop.net\/wp-content\/uploads\/2017\/11\/CAM00854.jpg' class=\"thickbox no_icon\"><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/www.turborebop.net\/wp-content\/uploads\/2017\/11\/CAM00854-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" \/><\/a>\n\t\t\t<\/dt><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon portrait'>\n\t\t\t\t<a href='https:\/\/www.turborebop.net\/wp-content\/uploads\/2017\/11\/CAM00852.jpg' class=\"thickbox no_icon\"><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/www.turborebop.net\/wp-content\/uploads\/2017\/11\/CAM00852-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" \/><\/a>\n\t\t\t<\/dt><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/www.turborebop.net\/wp-content\/uploads\/2017\/11\/CAM00859.jpg' class=\"thickbox no_icon\"><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/www.turborebop.net\/wp-content\/uploads\/2017\/11\/CAM00859-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" \/><\/a>\n\t\t\t<\/dt><\/dl><br style=\"clear: both\" \/>\n\t\t<\/div>\n\n<p>The design seems to be important with this kind of builds, since there is a number of existing products around. It is about identity &#8211; the difference.<\/p>\n<p>The form is clearly that of a half of the violin. Theremin was first played by trained violinists. The playing is also quite resemblant to that of a violin- especially the vibrato. And: the sound that is preferred is very similar to that of a violin. Of course, theremin is not a violin, and the cutoff side is there for all the knobs and buttons. The prolonged aluminium tube is not a neck of the violin, but it is the mounting point for the pitch antenna. The design is the mirror image of the most theremin designs: the pitch antenna is on the left and the volume antenna is on the right (hand on the loudspeaker turns the volume down).<\/p>\n<p>Electronic part are:<br \/>\n&#8211; theremin board<br \/>\n&#8211; small power amplifier board with output transformer and loudspeaker to provide power below 7W<br \/>\n&#8211; power line transformer<br \/>\n&#8211; still to come: the addition of digital interface that outputs MIDI<\/p>\n<p>The small output transformer was used to electrically isolate the theremin from other equipment &#8211; when connected to a audio mixing desk or the likes.The power line transformers that i have are rated 48V\/ 0.3A &#8211; so a step down transformed for a loudspeaker was anyway needed.<\/p>\n<p>Mechanical parts are:<br \/>\n&#8211; front plate aluminium L profile to hold the theremin PCB<br \/>\n&#8211; box made of cheap fake parquet boards cut with CNC2 router<br \/>\n&#8211; transparent plexiglass cover cut with CNC2 router (still needs the opening holes for the loudspeaker sound)<br \/>\n&#8211; another plexi will be thermo-formed with the use of a form already prepared &#8211; this will be the sides of the violin\/ theremin body<br \/>\n&#8211; the stand (theremin needs to be isolated from proximity of other grounded equipment &#8211; and persons)<\/p>\n<p>will continue&#8230;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>&#8230;work in progress: theremin is one of the first electronic musical instruments &#8211; from the start developed with the music in mind.<\/p>\n","protected":false},"author":1,"featured_media":619,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[39,1,3],"tags":[40],"class_list":["post-613","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-devices","category-archive","category-tech","tag-builds"],"_links":{"self":[{"href":"https:\/\/www.turborebop.net\/index.php?rest_route=\/wp\/v2\/posts\/613","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.turborebop.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.turborebop.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.turborebop.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.turborebop.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=613"}],"version-history":[{"count":0,"href":"https:\/\/www.turborebop.net\/index.php?rest_route=\/wp\/v2\/posts\/613\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.turborebop.net\/index.php?rest_route=\/wp\/v2\/media\/619"}],"wp:attachment":[{"href":"https:\/\/www.turborebop.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=613"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.turborebop.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=613"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.turborebop.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=613"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}