{"id":2754,"date":"2023-12-13T11:14:05","date_gmt":"2023-12-13T09:14:05","guid":{"rendered":"http:\/\/oh2ap.fi\/?page_id=2754"},"modified":"2023-12-13T11:22:50","modified_gmt":"2023-12-13T09:22:50","slug":"vhf-suodatin","status":"publish","type":"page","link":"https:\/\/oh2ap.fi\/?page_id=2754","title":{"rendered":"VHF-suodatin"},"content":{"rendered":"<p><strong>VHF-suodatin<\/strong><\/p>\n<p>Toisinaan \u2013 etenkin itse tehdyiss\u00e4 l\u00e4hettimiss\u00e4 \u2013 eiv\u00e4t l\u00e4hettimen p\u00e4\u00e4teasteen omat suodattimet aina riit\u00e4 vaimentamaan yliaaltoja riitt\u00e4v\u00e4sti. Erityinen tuska ovat 17m ja 15m bandien toiset harmoniset ja 30m kolmas, jotka ovat varsin l\u00e4hell\u00e4 30MHz maagista rajaa. Viranomainenhan m\u00e4\u00e4r\u00e4\u00e4, ett\u00e4 yli 30MHz:n pit\u00e4\u00e4 harhal\u00e4hetteit\u00e4 pysty\u00e4 vaimentamaan v\u00e4hint\u00e4\u00e4n 60dB eik\u00e4 harhal\u00e4hete saa olla teholtaan suurempi kuin 25\u03bcW. YLE:n ULA-l\u00e4hetykset 88 \u2013 108MHz ja erityisesti sen yl\u00e4puolella olevat ilmailuradiotaajuudet 108 \u2013 144MHz on syyt\u00e4 yritt\u00e4\u00e4 pit\u00e4\u00e4 erityisen puhtaina.\u00a0<a href=\"http:\/\/oh2ap.fi\/wp-content\/uploads\/2023\/12\/VHF-suodatin-2023-RKu-20.docx\">VHF-suodatin 2023 RKu 20<\/a><\/p>\n<p>Kyn\u00e4ll\u00e4 ja kolvilla de Rauno OH3FR<\/p>\n","protected":false},"excerpt":{"rendered":"<p>VHF-suodatin Toisinaan \u2013 etenkin itse tehdyiss\u00e4 l\u00e4hettimiss\u00e4 \u2013 eiv\u00e4t l\u00e4hettimen p\u00e4\u00e4teasteen omat suodattimet aina riit\u00e4 vaimentamaan yliaaltoja riitt\u00e4v\u00e4sti. Erityinen tuska ovat 17m ja 15m bandien toiset harmoniset ja 30m kolmas, jotka ovat varsin l\u00e4hell\u00e4 30MHz maagista rajaa. Viranomainenhan m\u00e4\u00e4r\u00e4\u00e4, ett\u00e4 yli 30MHz:n pit\u00e4\u00e4 harhal\u00e4hetteit\u00e4 pysty\u00e4 vaimentamaan v\u00e4hint\u00e4\u00e4n 60dB eik\u00e4 harhal\u00e4hete saa olla teholtaan suurempi kuin [&hellip;]<\/p>\n","protected":false},"author":17,"featured_media":0,"parent":502,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-2754","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/oh2ap.fi\/index.php?rest_route=\/wp\/v2\/pages\/2754","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/oh2ap.fi\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/oh2ap.fi\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/oh2ap.fi\/index.php?rest_route=\/wp\/v2\/users\/17"}],"replies":[{"embeddable":true,"href":"https:\/\/oh2ap.fi\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2754"}],"version-history":[{"count":7,"href":"https:\/\/oh2ap.fi\/index.php?rest_route=\/wp\/v2\/pages\/2754\/revisions"}],"predecessor-version":[{"id":2764,"href":"https:\/\/oh2ap.fi\/index.php?rest_route=\/wp\/v2\/pages\/2754\/revisions\/2764"}],"up":[{"embeddable":true,"href":"https:\/\/oh2ap.fi\/index.php?rest_route=\/wp\/v2\/pages\/502"}],"wp:attachment":[{"href":"https:\/\/oh2ap.fi\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2754"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}