{"id":10275,"date":"2025-02-03T08:44:43","date_gmt":"2025-02-03T08:44:43","guid":{"rendered":"https:\/\/museumkesher.org.il\/catalog\/quartz-crystal\/"},"modified":"2025-02-03T08:44:43","modified_gmt":"2025-02-03T08:44:43","slug":"quartz-crystal","status":"publish","type":"catalog","link":"https:\/\/museumkesher.org.il\/en\/catalog\/quartz-crystal\/","title":{"rendered":"Quartz Crystal"},"content":{"rendered":"<p>Natural Quartz crystals were used for oscillators in electronic equipment since 1921, and were the common means to determine transmitters\u2019 frequencies from the 1930\u2019s until late 1950\u2019s.<br \/>\nQuartz crystal in a certain structure has a piezoelectric property \u2013 an electrical voltage applied to the crystal creates a mechanical force \u2013 or alternatively, a mechanical force creates an electrical voltage. The crystal behaves as a precise resonant circuit, at a frequency determined by the physical dimensions of the crystal.<br \/>\nQuartz crystals in military communication equipment were based on a natural crystal plate, cut at an suitable angle and mounted between two metal plates, which held it at its four corners, so that it could vibrate.<\/p>\n","protected":false},"featured_media":10258,"template":"","catalog_cat":[36,35],"period":[99,39,93,44],"class_list":["post-10275","catalog","type-catalog","status-publish","has-post-thumbnail","hentry","catalog_cat-tactical-radio","catalog_cat-radio-telephone","period-pre-state","period-war-of-independence","period-sinai-campaign","period-six-day-war"],"acf":[],"_links":{"self":[{"href":"https:\/\/museumkesher.org.il\/en\/wp-json\/wp\/v2\/catalog\/10275","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/museumkesher.org.il\/en\/wp-json\/wp\/v2\/catalog"}],"about":[{"href":"https:\/\/museumkesher.org.il\/en\/wp-json\/wp\/v2\/types\/catalog"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/museumkesher.org.il\/en\/wp-json\/wp\/v2\/media\/10258"}],"wp:attachment":[{"href":"https:\/\/museumkesher.org.il\/en\/wp-json\/wp\/v2\/media?parent=10275"}],"wp:term":[{"taxonomy":"catalog_cat","embeddable":true,"href":"https:\/\/museumkesher.org.il\/en\/wp-json\/wp\/v2\/catalog_cat?post=10275"},{"taxonomy":"period","embeddable":true,"href":"https:\/\/museumkesher.org.il\/en\/wp-json\/wp\/v2\/period?post=10275"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}