{"id":138,"date":"2015-10-14T00:55:03","date_gmt":"2015-10-13T22:55:03","guid":{"rendered":"http:\/\/radioinorr.se\/?p=138"},"modified":"2019-11-09T21:20:22","modified_gmt":"2019-11-09T20:20:22","slug":"70cm-pa-compact-9000","status":"publish","type":"post","link":"https:\/\/radioinorr.se\/?p=138","title":{"rendered":"70Cm PA COMPACT 9000"},"content":{"rendered":"

Modifikation utav ett gammalt kommersiellt uhf steg.<\/strong><\/h2>\n

\"20150929_170849\"<\/a><\/p>\n

Det udda med detta projekt \u00e4r att anvinsingarna finns f\u00f6r att modifiera stegen, men med tidenstand s\u00e5 har bilder och sidor laggt ner p\u00e5 internet Men tackvare arcive.org s\u00e5 kunde jag f\u00e5r reda p\u00e5 en hel del info samt fr\u00e5n denna sida. <\/a>
\nSteget som ska modifieras \u00e4r ett Ericsson Compact 9000 det \u00e4r ursprungligen ett FM steg men kan b\u00e5de linjeseras f\u00f6r SSB ,AM d\u00e5 trissorna \u00e4r utav class AB.<\/p>\n

\"20150929_173753\"<\/a><\/p>\n

F\u00f6rsta modifikationen som gjordes var att montera vridkondensatorer p\u00e5 ing\u00e5ngs Blanasbanorna f\u00f6r transistorerna detta f\u00f6ra att kunna anpassa steget fr\u00e5n 460 mhz till 433 mhz. dessa ska vara mellan 1.3 pF till ca 33 pF,  (detta var den enkla delen)<\/p>\n

F\u00f6r att kunna svepa steget med en tracing generator \/ Spec s\u00e5 m\u00e5ste Steget g\u00e5 linj\u00e4rt d\u00e5 Klass C inte \u00e4r linj\u00e4ra men \u00e4r bra f\u00f6r FM och CW. Detta steg var enkelt att linjesera det man m\u00e5ste g\u00f6ra \u00e4r att H\u00f6ja Bias str\u00f6mmen till transistorerna s\u00e5 att dessa \u00e4r \u00f6ppna n\u00e4r signalen kommer.<\/p>\n

\"20150929_171558\"<\/a><\/p>\n

Det finns tv\u00e5 delar utav slutstegskretsen som ser ut s\u00e5 h\u00e4r dessa \u00e4r till f\u00f6r bias str\u00f6mmen . transistorn dar in str\u00f6mmen i HF trissorna f\u00f6r eftersom att steget \u00e4r begr\u00e4nsat s\u00e5 s\u00e4tter man en resistor p\u00e5 2.2Kohm \u00f6ver den bl\u00e5 ytmonterade resistorn vilket ger en l\u00e4gre resistans \u00f6ver potentiometer p\u00e5  ca 600 ohm.
\n\"20151008_203121\"<\/a><\/p>\n

El schema f\u00f6r kretsen finnes h\u00e4r <\/a><\/strong><\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

Modifikation utav ett gammalt kommersiellt uhf steg. Det udda med detta projekt \u00e4r att anvinsingarna finns f\u00f6r att modifiera stegen,…<\/p>\n","protected":false},"author":1,"featured_media":320,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10],"tags":[],"class_list":["post-138","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-amp"],"_links":{"self":[{"href":"https:\/\/radioinorr.se\/index.php?rest_route=\/wp\/v2\/posts\/138","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/radioinorr.se\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/radioinorr.se\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/radioinorr.se\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/radioinorr.se\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=138"}],"version-history":[{"count":4,"href":"https:\/\/radioinorr.se\/index.php?rest_route=\/wp\/v2\/posts\/138\/revisions"}],"predecessor-version":[{"id":321,"href":"https:\/\/radioinorr.se\/index.php?rest_route=\/wp\/v2\/posts\/138\/revisions\/321"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/radioinorr.se\/index.php?rest_route=\/wp\/v2\/media\/320"}],"wp:attachment":[{"href":"https:\/\/radioinorr.se\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=138"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/radioinorr.se\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=138"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/radioinorr.se\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=138"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}