{"id":1157,"date":"2016-08-21T19:26:02","date_gmt":"2016-08-21T18:26:02","guid":{"rendered":"http:\/\/www.crowave.com\/blog\/?p=1157"},"modified":"2017-02-17T21:23:51","modified_gmt":"2017-02-17T20:23:51","slug":"osciloskop-iskra-ma-4005","status":"publish","type":"post","link":"https:\/\/www.crowave.com\/blog\/2016\/08\/21\/osciloskop-iskra-ma-4005\/","title":{"rendered":"OSCILOSKOP ISKRA MA 4005"},"content":{"rendered":"<p>Danas je nabavljen osciloskop proizvo\u0111a\u010da ISKRA oznake MA 4005 iz 1950-tih godina. Kako to obi\u010dno biva, elektri\u010dnu shemu ili bilo kakvu dokumentaciju te\u0161ko je prona\u0107i, no ovdje se sre\u0107om radi o ispravnom osciloskopu pa se testiranjem barem mogu ispitati njegove mogu\u0107nosti.<\/p>\n<p><a href=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2016\/08\/osciloskop_iskra_ma4005_02.jpg\" rel=\"lightbox[1157]\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-1159\" src=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2016\/08\/osciloskop_iskra_ma4005_02-768x1024.jpg\" alt=\"osciloskop_iskra_ma4005_02\" width=\"768\" height=\"1024\" srcset=\"http:\/\/crowave.com\/blog\/wp-content\/uploads\/2016\/08\/osciloskop_iskra_ma4005_02-768x1024.jpg 768w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2016\/08\/osciloskop_iskra_ma4005_02-225x300.jpg 225w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2016\/08\/osciloskop_iskra_ma4005_02.jpg 1728w\" sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/><\/a><\/p>\n<p><a href=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2016\/08\/osciloskop_iskra_ma4005_03.jpg\" rel=\"lightbox[1157]\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-1160\" src=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2016\/08\/osciloskop_iskra_ma4005_03-786x1024.jpg\" alt=\"osciloskop_iskra_ma4005_03\" width=\"786\" height=\"1024\" srcset=\"http:\/\/crowave.com\/blog\/wp-content\/uploads\/2016\/08\/osciloskop_iskra_ma4005_03-786x1024.jpg 786w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2016\/08\/osciloskop_iskra_ma4005_03-230x300.jpg 230w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2016\/08\/osciloskop_iskra_ma4005_03-768x1001.jpg 768w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2016\/08\/osciloskop_iskra_ma4005_03.jpg 1506w\" sizes=\"auto, (max-width: 786px) 100vw, 786px\" \/><\/a><\/p>\n<p><a href=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2016\/08\/osciloskop_iskra_ma4005_04.jpg\" rel=\"lightbox[1157]\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-1161\" src=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2016\/08\/osciloskop_iskra_ma4005_04-1024x768.jpg\" alt=\"osciloskop_iskra_ma4005_04\" width=\"1024\" height=\"768\" srcset=\"http:\/\/crowave.com\/blog\/wp-content\/uploads\/2016\/08\/osciloskop_iskra_ma4005_04-1024x768.jpg 1024w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2016\/08\/osciloskop_iskra_ma4005_04-300x225.jpg 300w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2016\/08\/osciloskop_iskra_ma4005_04-768x576.jpg 768w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/p>\n<p>Osciloskop MA 4005 ima ukupno \u0161est elektronskih cijevi: dvije dvostruke triode ECC82, dvije dvostruke triode ECC81, pentodu EF80 i stabilizator napona OA2. Osciloskop je elektri\u010dki i po mogu\u0107nostima vrlo sli\u010dan ve\u0107 opisanom <a href=\"http:\/\/www.crowave.com\/blog\/2016\/08\/21\/osciloskop-riz-os-157a\/\" target=\"_blank\">OSCILOSKOPU RIZ OS-157A<\/a> pa ovdje ne\u0107emo ponavljati princip rada pojedinih sklopova unutar ovakvih osciloskopa.<\/p>\n<p><a href=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2016\/08\/osciloskop_iskra_ma4005_07.jpg\" rel=\"lightbox[1157]\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-1164\" src=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2016\/08\/osciloskop_iskra_ma4005_07-1024x822.jpg\" alt=\"osciloskop_iskra_ma4005_07\" width=\"1024\" height=\"822\" srcset=\"http:\/\/crowave.com\/blog\/wp-content\/uploads\/2016\/08\/osciloskop_iskra_ma4005_07-1024x822.jpg 1024w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2016\/08\/osciloskop_iskra_ma4005_07-300x241.jpg 300w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2016\/08\/osciloskop_iskra_ma4005_07-768x616.jpg 768w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/p>\n<p><a href=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2016\/08\/osciloskop_iskra_ma4005_08.jpg\" rel=\"lightbox[1157]\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-1165\" src=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2016\/08\/osciloskop_iskra_ma4005_08-1024x768.jpg\" alt=\"osciloskop_iskra_ma4005_08\" width=\"1024\" height=\"768\" srcset=\"http:\/\/crowave.com\/blog\/wp-content\/uploads\/2016\/08\/osciloskop_iskra_ma4005_08-1024x768.jpg 1024w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2016\/08\/osciloskop_iskra_ma4005_08-300x225.jpg 300w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2016\/08\/osciloskop_iskra_ma4005_08-768x576.jpg 768w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/p>\n<p><a href=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2016\/08\/osciloskop_iskra_ma4005_06.jpg\" rel=\"lightbox[1157]\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-1163\" src=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2016\/08\/osciloskop_iskra_ma4005_06-1024x768.jpg\" alt=\"osciloskop_iskra_ma4005_06\" width=\"1024\" height=\"768\" srcset=\"http:\/\/crowave.com\/blog\/wp-content\/uploads\/2016\/08\/osciloskop_iskra_ma4005_06-1024x768.jpg 1024w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2016\/08\/osciloskop_iskra_ma4005_06-300x225.jpg 300w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2016\/08\/osciloskop_iskra_ma4005_06-768x576.jpg 768w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/p>\n<p><a href=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2016\/08\/osciloskop_iskra_ma4005_05.jpg\" rel=\"lightbox[1157]\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-1162\" src=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2016\/08\/osciloskop_iskra_ma4005_05-1024x768.jpg\" alt=\"osciloskop_iskra_ma4005_05\" width=\"1024\" height=\"768\" srcset=\"http:\/\/crowave.com\/blog\/wp-content\/uploads\/2016\/08\/osciloskop_iskra_ma4005_05-1024x768.jpg 1024w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2016\/08\/osciloskop_iskra_ma4005_05-300x225.jpg 300w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2016\/08\/osciloskop_iskra_ma4005_05-768x576.jpg 768w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/p>\n<p>Osciloskop MA 4005 ima deklarirani mjerni opseg u rasponu od 5Hz do 50kHz, a testiranjem je potvr\u0111eno da relativo dobro mo\u017ee prikazati pravokutni signal do 100kHz, a sinusni gotovo do 1MHz. Ipak za precizno mjerenje grani\u010dne vrijednosti idu do nekih 60kHz. Sinkronizacija vremenske baze posti\u017ee se bez ve\u0107ih te\u0161ko\u0107a odabirom ispravog mjernog opsega i zatim finim pode\u0161avanjem pripadaju\u0107im potenciometrima. Na slici je primjer prikaza slo\u017eenog signala frekvencije 2kHz.<\/p>\n<p><a href=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2016\/08\/osciloskop_iskra_ma4005_01.jpg\" rel=\"lightbox[1157]\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-1158\" src=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2016\/08\/osciloskop_iskra_ma4005_01-768x1024.jpg\" alt=\"osciloskop_iskra_ma4005_01\" width=\"768\" height=\"1024\" srcset=\"http:\/\/crowave.com\/blog\/wp-content\/uploads\/2016\/08\/osciloskop_iskra_ma4005_01-768x1024.jpg 768w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2016\/08\/osciloskop_iskra_ma4005_01-225x300.jpg 225w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2016\/08\/osciloskop_iskra_ma4005_01.jpg 1728w\" sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/><\/a><\/p>\n<p>Ovaj osciloskop navr\u0161io je vi\u0161e od 60 godina \u017eivota i jo\u0161 ne pokazuje izra\u017eene znakove umora. Unato\u010d tome zaslu\u017euje malo njege i kozmeti\u010dkog tretmana za osvje\u017eenje njegovog jo\u0161 vrlo dobro o\u010duvanog nali\u010dja, a nakon toga i podu\u017ei odmor na nekom svojem posebnom mjestu na vintage polici \ud83d\ude42<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Danas je nabavljen osciloskop proizvo\u0111a\u010da ISKRA oznake MA 4005 iz 1950-tih godina. Kako to obi\u010dno biva, elektri\u010dnu shemu ili bilo kakvu dokumentaciju te\u0161ko je prona\u0107i, no ovdje se sre\u0107om radi o ispravnom osciloskopu pa se testiranjem barem mogu ispitati njegove mogu\u0107nosti. Osciloskop MA 4005 ima ukupno \u0161est elektronskih cijevi: dvije dvostruke triode ECC82, dvije dvostruke [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[64,15],"tags":[],"class_list":{"0":"post-1157","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-cijevni","7":"category-mjerni","8":"czr-hentry"},"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/www.crowave.com\/blog\/wp-json\/wp\/v2\/posts\/1157","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.crowave.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.crowave.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.crowave.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.crowave.com\/blog\/wp-json\/wp\/v2\/comments?post=1157"}],"version-history":[{"count":3,"href":"https:\/\/www.crowave.com\/blog\/wp-json\/wp\/v2\/posts\/1157\/revisions"}],"predecessor-version":[{"id":1168,"href":"https:\/\/www.crowave.com\/blog\/wp-json\/wp\/v2\/posts\/1157\/revisions\/1168"}],"wp:attachment":[{"href":"https:\/\/www.crowave.com\/blog\/wp-json\/wp\/v2\/media?parent=1157"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.crowave.com\/blog\/wp-json\/wp\/v2\/categories?post=1157"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.crowave.com\/blog\/wp-json\/wp\/v2\/tags?post=1157"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}