{"id":4387,"date":"2015-10-26T15:11:00","date_gmt":"2015-10-26T14:11:00","guid":{"rendered":"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/?p=4387"},"modified":"2023-10-14T11:37:58","modified_gmt":"2023-10-14T10:37:58","slug":"jak-jsem-delal-antenni-filtry-pro-ok0mf","status":"publish","type":"post","link":"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/2015\/10\/jak-jsem-delal-antenni-filtry-pro-ok0mf\/","title":{"rendered":"Jak jsem d\u011blal ant\u00e9nn\u00ed filtry pro OK0MF"},"content":{"rendered":"\n<p><em><strong>\u2026Je to bezvadn\u00e9 p\u00e1smo, kdy\u017e m\u00e1te to \u0161t\u011bst\u00ed a Matka P\u0159\u00edroda zat\u00e1hne za \u0159et\u011bz\u2026<\/strong><\/em><\/p>\n\n\n\n<p><em><strong>\u201c<\/strong><\/em>P\u0159i stavb\u011b <a href=\"http:\/\/www.prevadece.cz\/clanky\/50-mhz-prevadec-ok0mf-suchy-vrch\" target=\"_blank\" rel=\"noreferrer noopener\">6m p\u0159evad\u011b\u010de <em><strong>OK0MF<\/strong><\/em><\/a> na m\u011b p\u0159ipadl \u00fakol vy\u0159e\u0161it ant\u00e9nn\u00ed filtraci \/ duplexer. Duplexer na 50MHz jsme samoz\u0159ejm\u011b nem\u011bli a jeho po\u0159\u00edzen\u00ed by p\u0159evad\u011b\u010d zna\u010dn\u011b prodra\u017eilo. Nav\u00edc je kmito\u010dtov\u00fd offset v p\u00e1smu 6m pouze 600kHz, co\u017e je p\u0159i pot\u0159ebn\u00e9 izolaci \u223c80dB celkem n\u00e1ro\u010dn\u00e9. Na internetu jsem na\u0161el stavbu duplexeru amat\u00e9rsk\u00fdm zp\u016fsobem pomoc\u00ed <a href=\"http:\/\/oh2btg.blogspot.cz\/2015\/03\/6m-50mhz-duplexer-for-repeater-do-it.html\" target=\"_blank\" rel=\"noreferrer noopener\">koaxi\u00e1ln\u00edho kabelu 1\u20335\/8 helical<\/a> . To m\u011blo v\u0161ak hned dva probl\u00e9my, sehnat pat\u0159i\u010dn\u00fd koaxi\u00e1l, tak\u00e9 rozm\u011bry duplexeru nejsou zanedbateln\u00e9. Tudy cesta nevedla. Po del\u0161\u00ed \u00favaze jsem se rozhodnul ud\u011blat filtraci pomoc\u00ed helical dutin. Ty vych\u00e1z\u00ed rozm\u011brov\u011b dob\u0159e a parametry taky. V p\u016fvodn\u00ed \u00favaze figuroval je\u0161t\u011b krystalov\u00fd filtr coby band-pass, ten ale p\u0159i minim\u00e1ln\u00ed pot\u0159ebn\u00e9 \u0161\u00ed\u0159ce p\u00e1sma 30kHz vych\u00e1z\u00ed na 3-5 sad krystal\u016f. P\u0159i cen\u011b za sadu cca 1700k\u010d a nejistot\u011b v\u00fdsledku jsme toto zavrhli.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Z\u00e1kladn\u00ed parametry pevad\u011b\u010de byly:<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Budou pou\u017eity dv\u011b ant\u00e9ny, RX a TX zvl\u00e1\u0161\u0165<\/li>\n\n\n\n<li>Ant\u00e9ny budou \u223c23m od sebe, odstup bude \u223c30dB \u2013 se kter\u00fdm po\u010d\u00edt\u00e1me v parametrech.<\/li>\n\n\n\n<li>RX strana bude obsahovat 1x band-pass filtr (kmito\u010det RX) a 2x Notch (kmito\u010det TX) \u00fatlum <strong>-55dB<\/strong><\/li>\n\n\n\n<li>TX strana bude obsahovat 3x Notch (kmito\u010det RX) \u00fatlum<strong> -75dB<\/strong><\/li>\n\n\n\n<li>Je pot\u0159eba o\u0161et\u0159it nejbli\u017e\u0161\u00ed ru\u0161iv\u00e9 kmito\u010dty tj. CB opakova\u010d a FM radio (87,6MHz \/ 1kW), TX OK0MF.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Rozm\u00edst\u011bn\u00ed na k\u00f3t\u011b:<\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/Mapa_ok0mf.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1440\" height=\"803\" src=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/Mapa_ok0mf.jpg\" alt=\"\" class=\"wp-image-521\" srcset=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/Mapa_ok0mf.jpg 1440w, https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/Mapa_ok0mf-300x167.jpg 300w\" sizes=\"auto, (max-width: 1440px) 100vw, 1440px\" \/><\/a><\/figure>\n\n\n\n<p>1.&nbsp;&nbsp; OK0MF \u2013 RX<\/p>\n\n\n\n<p>2.&nbsp;&nbsp; OK0MF \u2013 TX<\/p>\n\n\n\n<p>3.&nbsp;&nbsp; CB opakova\u010d<\/p>\n\n\n\n<p>4.&nbsp;&nbsp; FM vys\u00edla\u010d \u2013 \u010cern\u00e1 hora<\/p>\n\n\n\n<p>Jako materi\u00e1l pro obal dutin jsem zvolil Cu okapovou rouru d\u00e9lky 150mm s pr\u016fm\u011brem 80mm a tlou\u0161\u0165kou st\u011bny 0,5mm. Dr\u00e1t pro vinut\u00ed c\u00edvek je op\u011bt Cu \u2205 3,4mm (2,8mm).Kondenz\u00e1tory pro dolad\u011bn\u00ed jsou typu <a href=\"http:\/\/www.johansonmfg.com\/media\/pdf\/Air-Capacitor.pdf\" target=\"_blank\" rel=\"noreferrer noopener\">Johanson 5202<\/a> (0,8-10pF). Konektory pak BNC. Na\u0159ezan\u00e9 dutiny jsem zaslepil Cu plechem z t\u00e9\u017ee roury, v\u00ed\u010dka jsou p\u0159\u00edp\u00e1jena k dutin\u00e1m a zalepena Cu foli\u00ed. Vnit\u0159n\u00ed samonosn\u00e9 c\u00edvky jsem fixoval plastem z tavn\u00e9 pistole, to se ale neuk\u00e1zalo jako dobr\u00e9 \u0159e\u0161en\u00ed. Termoplast m\u00e1 celkem vysokou kapacitu a p\u0159\u00ed v\u00fdkonu cca 20W se vytavil a ztekl na dno dutiny. C\u00edvka je vlastn\u011b autotransform\u00e1tor, kter\u00fd m\u00e1 nap\u00e1jen\u00ed na 0,5z, tak\u017ee na 10. z\u00e1vitu je u\u017e \u201cslu\u0161n\u00e1 p\u00e1ra\u201d. Stejn\u011b jsem dopadnul s tisknutou kost\u0159i\u010dkou z ABS, tak\u017ee jsem nakonec zkon\u010dil u sklolamin\u00e1tu a z\u00e1vity jsem k sklolamin\u00e1tov\u00e9 desti\u010dce fixoval epoxidem.<\/p>\n\n\n\n<p><em><strong>Sekce RX:<\/strong><\/em><\/p>\n\n\n\n<p>Proto\u017ee \u017e\u00e1dn\u00e9 st\u0159\u00edb\u0159en\u00ed je lep\u0161\u00ed ne\u017e \u0161patn\u00e9 st\u0159\u00edb\u0159en\u00ed, rozhodnul jsem se vyle\u0161t\u011bnou m\u011b\u010f pouze nalakovat p\u00e1jiteln\u00fdm lakem (5 vrstev). M\u011b\u010f na kmito\u010dtu 52MHz m\u00e1 <a href=\"http:\/\/chemandy.com\/calculators\/skin-effect-calculator.htm\">m\u00edru vnik\u00e1n\u00ed <\/a>(<a href=\"https:\/\/cs.wikipedia.org\/wiki\/Skin_efekt\">skin effect<\/a>) \u22489\u03bcm, co\u017e je relativn\u011b dost a st\u0159\u00edb\u0159en\u00ed nen\u00ed ani nutn\u00e9.<\/p>\n\n\n\n<p>\u0158et\u011bzec filtr\u016f pro p\u0159ij\u00edma\u010d m\u00e1 za \u00fakol dostate\u010dn\u011b zatlumit n\u00e1m ne\u017e\u00e1douc\u00ed kmito\u010dty.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>CB opakova\u010d \u201cFaltus\u201d 27,255MHz(4W)&nbsp; \u00farove\u0148 na ant. vstupu:cca +0dBm (52m)<\/li>\n\n\n\n<li>FM komer\u010dn\u00ed vys\u00edla\u010d 87,6 (1kW) \u00farove\u0148 na ant. vstupu: cca +16dBm (44m)<\/li>\n\n\n\n<li>Vlastn\u00ed TX p\u0159evad\u011b\u010de OK0MF (10W do ant.) \u00farove\u0148 na ant. vstupu: cca +7dBm (23m)<\/li>\n<\/ul>\n\n\n\n<p>Vlastn\u00ed vys\u00edla\u010d je nejbli\u017e\u0161\u00ed a nejsiln\u011bj\u0161\u00ed sign\u00e1l, ten by proch\u00e1zel vstupn\u00edmi filtry radiostanice a zahlcoval vstupn\u00ed p\u0159edzesilova\u010d, kter\u00fd m\u00e1 vlastn\u00ed zes\u00edlen\u00ed \u223c20dB. CB opakova\u010d a vys\u00edla\u010d FM r\u00e1dia \u201c\u010cern\u00e1 hora\u201d jsou u\u017e dostate\u010dn\u011b daleko. Pro potla\u010den\u00ed CB a okoln\u00edch podru\u017en\u00fdch vys\u00edla\u010d\u016f posta\u010duje band-pass dutina, pro FM r\u00e1dio \u00bc \u03bb pah\u00fdl, pro TX p\u0159evad\u011b\u010de pak 2x dutina Notch.<\/p>\n\n\n\n<p>\u201c<a href=\"https:\/\/en.wikipedia.org\/wiki\/Path_loss\">Path loss<\/a>\u201d tedy \u00fatlum prost\u0159ed\u00ed mezi ant\u00e9nami je d\u00e1n vztahem:<img decoding=\"async\" src=\"https:\/\/web.archive.org\/web\/20180525052043im_\/https:\/\/upload.wikimedia.org\/math\/c\/3\/a\/c3a78b7c3bef76b96386d9076e62d607.png\" alt=\"L = 20\\ \\log_{10}\\left(\\frac{4\\pi d}{\\lambda}\\right) \">&nbsp;&nbsp;&nbsp; [m, dB]<\/p>\n\n\n\n<p>N\u011bkolik obr\u00e1zk\u016f konstrukce Band-Pass &amp; Notch helical dutin:<\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-2 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/rezani_dutin_2.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1280\" height=\"1024\" data-id=\"550\" src=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/rezani_dutin_2.jpg\" alt=\"\" class=\"wp-image-550\" srcset=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/rezani_dutin_2.jpg 1280w, https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/rezani_dutin_2-300x240.jpg 300w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/Dutina_BP_2.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1280\" height=\"1024\" data-id=\"505\" src=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/Dutina_BP_2.jpg\" alt=\"\" class=\"wp-image-505\" srcset=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/Dutina_BP_2.jpg 1280w, https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/Dutina_BP_2-300x240.jpg 300w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/Dutina_BP_1.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1280\" height=\"1024\" data-id=\"504\" src=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/Dutina_BP_1.jpg\" alt=\"\" class=\"wp-image-504\" srcset=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/Dutina_BP_1.jpg 1280w, https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/Dutina_BP_1-300x240.jpg 300w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/cropped-notch_dutina.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"512\" height=\"512\" data-id=\"857\" src=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/cropped-notch_dutina.jpg\" alt=\"\" class=\"wp-image-857\" srcset=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/cropped-notch_dutina.jpg 512w, https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/cropped-notch_dutina-150x150.jpg 150w, https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/cropped-notch_dutina-300x300.jpg 300w, https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/cropped-notch_dutina-270x270.jpg 270w, https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/cropped-notch_dutina-192x192.jpg 192w, https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/cropped-notch_dutina-180x180.jpg 180w, https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/cropped-notch_dutina-32x32.jpg 32w\" sizes=\"auto, (max-width: 512px) 100vw, 512px\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/fixace_civky.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1280\" height=\"1024\" data-id=\"549\" src=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/fixace_civky.jpg\" alt=\"\" class=\"wp-image-549\" srcset=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/fixace_civky.jpg 1280w, https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/fixace_civky-300x240.jpg 300w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/Dutina_BP_4.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1280\" height=\"1024\" data-id=\"500\" src=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/Dutina_BP_4.jpg\" alt=\"\" class=\"wp-image-500\" srcset=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/Dutina_BP_4.jpg 1280w, https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/Dutina_BP_4-300x240.jpg 300w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/Dutina_BP_3.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1280\" height=\"1024\" data-id=\"506\" src=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/Dutina_BP_3.jpg\" alt=\"\" class=\"wp-image-506\" srcset=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/Dutina_BP_3.jpg 1280w, https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/Dutina_BP_3-300x240.jpg 300w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/Dutina_BP_5.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"960\" height=\"1200\" data-id=\"501\" src=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/Dutina_BP_5-960x1200.jpg\" alt=\"\" class=\"wp-image-501\" srcset=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/Dutina_BP_5-960x1200.jpg 960w, https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/Dutina_BP_5-240x300.jpg 240w, https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/Dutina_BP_5.jpg 1024w\" sizes=\"auto, (max-width: 960px) 100vw, 960px\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/TX_prototyp1.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1280\" height=\"1024\" data-id=\"548\" src=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/TX_prototyp1.jpg\" alt=\"\" class=\"wp-image-548\" srcset=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/TX_prototyp1.jpg 1280w, https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/TX_prototyp1-300x240.jpg 300w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/RX_prototyp1.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1280\" height=\"1024\" data-id=\"547\" src=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/RX_prototyp1.jpg\" alt=\"\" class=\"wp-image-547\" srcset=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/RX_prototyp1.jpg 1280w, https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/RX_prototyp1-300x240.jpg 300w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/RTX_prototyp1.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1280\" height=\"1024\" data-id=\"546\" src=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/RTX_prototyp1.jpg\" alt=\"\" class=\"wp-image-546\" srcset=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/RTX_prototyp1.jpg 1280w, https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/RTX_prototyp1-300x240.jpg 300w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/vyroba_dutin.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1280\" height=\"1024\" data-id=\"530\" src=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/vyroba_dutin.jpg\" alt=\"\" class=\"wp-image-530\" srcset=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/vyroba_dutin.jpg 1280w, https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/vyroba_dutin-300x240.jpg 300w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><\/a><\/figure>\n<\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Parametry \u0159et\u011bzce pro RX jsou n\u00e1sleduj\u00edc\u00ed:<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Pr\u016fchoz\u00ed ztr\u00e1ta (<a rel=\"noreferrer noopener\" href=\"https:\/\/web.archive.org\/web\/20180525052043\/https:\/\/en.wikipedia.org\/wiki\/Insertion_loss\" target=\"_blank\">i<\/a><a href=\"https:\/\/en.wikipedia.org\/wiki\/Insertion_loss\" target=\"_blank\" rel=\"noreferrer noopener\">nsertion loss<\/a>) <strong>Band-pass dutiny je -0,3 dB<br><\/strong><\/li>\n\n\n\n<li>Pr\u016fchoz\u00ed ztr\u00e1ta cel\u00e9ho RX \u0159et\u011bzce (51,370MHz) je: -1,8 dB<\/li>\n\n\n\n<li>\u00datlum na 3,7 MHz \u2248 -46dB<\/li>\n\n\n\n<li>\u00datlum na 14 MHz \u2248 -32dB<\/li>\n\n\n\n<li>\u00datlum na 27,255 MHz \u2248 -22dB<\/li>\n\n\n\n<li>\u00datlum na 87,6 MHz \u2248 -50dB<\/li>\n\n\n\n<li>\u00datlum na TX OK0MF (51,970MHz) je -55dB<\/li>\n\n\n\n<li><strong>Citlivost RX s filtry je 0,35\u03bcV \/ -116dBm (10dB <a href=\"https:\/\/en.wikipedia.org\/wiki\/SINAD\" target=\"_blank\" rel=\"noreferrer noopener\">SINAD<\/a>)<br><\/strong>Pro aktivaci p\u0159evad\u011b\u010de sta\u010d\u00ed pak sign\u00e1l o cca 3dB slab\u0161\u00ed tedy -119dBm \/ 0,25\u03bcV<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Viz m\u011b\u0159en\u00ed:<\/h2>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-3 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/Reject_FM.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1280\" height=\"1024\" data-id=\"542\" src=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/Reject_FM.jpg\" alt=\"\" class=\"wp-image-542\" srcset=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/Reject_FM.jpg 1280w, https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/Reject_FM-300x240.jpg 300w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/B-P_char.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1280\" height=\"1024\" data-id=\"543\" src=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/B-P_char.jpg\" alt=\"\" class=\"wp-image-543\" srcset=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/B-P_char.jpg 1280w, https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/B-P_char-300x240.jpg 300w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/reject_TX.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1280\" height=\"1024\" data-id=\"544\" src=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/reject_TX.jpg\" alt=\"\" class=\"wp-image-544\" srcset=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/reject_TX.jpg 1280w, https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/reject_TX-300x240.jpg 300w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><\/a><\/figure>\n<\/figure>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-4 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/Chrakteristika_70cm.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1280\" height=\"1024\" data-id=\"581\" src=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/Chrakteristika_70cm.jpg\" alt=\"\" class=\"wp-image-581\" srcset=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/Chrakteristika_70cm.jpg 1280w, https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/Chrakteristika_70cm-300x240.jpg 300w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/Chrakteristika_2m.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1280\" height=\"1024\" data-id=\"582\" src=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/Chrakteristika_2m.jpg\" alt=\"\" class=\"wp-image-582\" srcset=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/Chrakteristika_2m.jpg 1280w, https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/Chrakteristika_2m-300x240.jpg 300w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/Chrakteristika_HF.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1280\" height=\"1024\" data-id=\"580\" src=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/Chrakteristika_HF.jpg\" alt=\"\" class=\"wp-image-580\" srcset=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/Chrakteristika_HF.jpg 1280w, https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/Chrakteristika_HF-300x240.jpg 300w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><\/a><\/figure>\n<\/figure>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-5 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/10\/TX_mereni_zmenseno.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1280\" height=\"905\" data-id=\"632\" src=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/10\/TX_mereni_zmenseno.jpg\" alt=\"\" class=\"wp-image-632\" srcset=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/10\/TX_mereni_zmenseno.jpg 1280w, https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/10\/TX_mereni_zmenseno-300x212.jpg 300w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/10\/RX_mereni.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1280\" height=\"905\" data-id=\"631\" src=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/10\/RX_mereni.jpg\" alt=\"\" class=\"wp-image-631\" srcset=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/10\/RX_mereni.jpg 1280w, https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/10\/RX_mereni-300x212.jpg 300w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><\/a><\/figure>\n<\/figure>\n\n\n\n<p>Co se mechanick\u00e9 pevnosti t\u00fd\u010de, tak prvn\u00edm necht\u011bn\u00fdm testem byl p\u00e1d jedn\u00e9 z Notch dutin ze stolu na parkety pod n\u00edm (80cm). \u201c\u0160kody\u201d jsou n\u00e1sleduj\u00edc\u00ed:<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/Skoda_po_padu.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1280\" height=\"1024\" src=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/Skoda_po_padu.jpg\" alt=\"\" class=\"wp-image-572\" srcset=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/Skoda_po_padu.jpg 1280w, https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/Skoda_po_padu-300x240.jpg 300w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><\/a><\/figure>\n\n\n\n<p>Parametry zm\u011bnila pouze dutina kter\u00e1 utrp\u011bla n\u00e1raz p\u00e1dem, p\u0159evoz se na zm\u011bn\u011b parametr\u016f neprojev\u00ed. Co\u017e se ned\u00e1 \u0159\u00edci o variant\u011b s koaxi\u00e1ln\u00edmy kabely, kter\u00e9 jsou n\u00e1chyln\u00e9 by\u010f jen na malou zm\u011bnu polohy a celek mus\u00ed b\u00fdt dob\u0159e fixov\u00e1n a obvykle nalad\u011bn a\u017e na m\u00edst\u011b kone\u010dn\u00e9ho provozu.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"alignleft\"><a href=\"https:\/\/web.archive.org\/web\/20180525052043\/http:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/Skoda_po_padu.jpg\" target=\"_blank\" rel=\"noreferrer noopener\"><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/web.archive.org\/web\/20180525052043im_\/http:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2015\/08\/Skoda_po_padu-150x150.jpg\" alt=\"Skoda_po_padu\" class=\"wp-image-572\" title=\"Rozlad\u011bn\u00ed po p\u00e1du dutiny\"\/><\/a><\/figure>\n<\/div>\n\n\n<p>Z tohoto obr\u00e1zku je dob\u0159e vid\u011bt zm\u011bna parametr\u016f dutiny Notch, ta se odladila o \u223c220kHz. Zhor\u0161ila t\u00edm Notch cel\u00e9ho \u0159et\u011bzce o 13dB \/ 29,5% ( z&nbsp; -44dB na -31dB)<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Band-pass kmito\u010det<\/li>\n\n\n\n<li>Notch pro TX p\u0159evad\u011b\u010de<\/li>\n\n\n\n<li>Rozlad\u011bn\u00ed jedn\u00e9 Notch dutiny oproti bodu 2<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Sekce TX :<\/strong><\/h2>\n\n\n\n<p>V sekci vys\u00edla\u010de je za\u0159azen trojn\u00e1sobn\u00fd HelicalNotch filtr pro RX (51,370MHz) kter\u00fd m\u00e1 <strong>maxim\u00e1ln\u00ed \u00fatlum -75dB<\/strong>. Filtr je zde kv\u016fli ochran\u011b p\u0159ed zvednut\u00edm \u0161umov\u00e9hu prahu, \u0161um generuje vys\u00edla\u010d a je produktem oscil\u00e1toru (term\u00e1ln\u00ed \u0161um), kter\u00fd pak d\u00e1le zes\u00edl\u00ed obvody radiostanice + PA. <strong>Pr\u016fchoz\u00ed \u00fatlum TX \u0159et\u011bzce je 2,3dB. V\u00fdkon na TX ant\u00e9nn\u00ed svorce je 15W.<br><\/strong><\/p>\n\n\n\n<p>Tento \u0161um kter\u00fd \u201czahlcuje\u201d p\u0159ij\u00edma\u010d se naz\u00fdv\u00e1 <a href=\"https:\/\/en.wikipedia.org\/wiki\/Desensitization_%28telecommunications%29\">Desensitization noise<\/a><\/p>\n\n\n\n<p>Desensitization noise by m\u011bl b\u00fdt cca 10dB pod prahem citlivosti p\u0159ij\u00edma\u010de aby ho neovliv\u0148oval.<\/p>\n\n\n\n<p>Teoretick\u00e1 citlivost RX je d\u00e1na vztahem<\/p>\n\n\n\n<p>[-174 + 10 * log B + 3]&nbsp;&nbsp;&nbsp;&nbsp; kde B je sirka pasma v Hz (pro nas pripad 16kHz). =&gt; to je -128dBm.<\/p>\n\n\n\n<p><strong>Zkracovac\u00ed \u010dinitel koaxi\u00e1l\u016f<\/strong>:<\/p>\n\n\n\n<p>Ve filtra\u010dn\u00edch \u010dlenech jsem n\u011bkolik druh\u016f propojek d\u00e9lky \u00bc \u03bb, ty jsou vyrobeny z koaxi\u00e1ln\u00edch kabel\u016f r\u016fzn\u00fdch impedanc\u00ed. Z\u00e1vislost mezi kmito\u010dtem a vlnovou d\u00e9lkou je d\u00e1m vztahem:<\/p>\n\n\n\n<p><strong>\u03bb = c \/ f&nbsp;&nbsp;<\/strong><\/p>\n\n\n\n<p>Vypo\u010dteme tedy vlnovou d\u00e9lku pro \u00bc \u03bb a tu vyn\u00e1sob\u00edme zkracovac\u00edm koeficientem pou\u017eit\u00e9ho koaxi\u00e1ln\u00edho kabelu.<\/p>\n\n\n\n<p><a href=\"http:\/\/www.grainger.com\/ec\/pdf\/General-Cable-Coaxial-Cable-RG-58U-Type-Product-Data-Sheet.pdf\">RG-58U<\/a>&nbsp; se zkracovac\u00edm \u010d\u00ednitelem 0,659 (rychlosti sv\u011btla c) a impedanc\u00ed 50\u03a9.<\/p>\n\n\n\n<p><a href=\"http:\/\/www.farnell.com\/datasheets\/1906624.pdf\">RG-62 AU<\/a> se zkracovac\u00edm \u010d\u00ednitelem 0,84 a impedanc\u00ed 93\u03a9<\/p>\n\n\n\n<p>H155 se zkracovac\u00edm \u010d\u00ednitelem 0,81 a impedanc\u00ed 50\u03a9<\/p>\n\n\n\n<p><strong>\u00bc \u03bb propojky RX (51,370 MHz)<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>RG-58U&nbsp;&nbsp; \u2013&nbsp;&nbsp; 0,962m<\/li>\n\n\n\n<li>RG-62AU \u2013&nbsp;&nbsp; 1,226m<\/li>\n\n\n\n<li>H155&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; \u2013&nbsp;&nbsp; 1,182m<\/li>\n<\/ul>\n\n\n\n<p><strong>\u00bc \u03bb propojky TX (51,970 MHz)<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>RG-58U&nbsp;&nbsp; \u2013&nbsp;&nbsp; 0,951m<\/li>\n\n\n\n<li>RG-62AU \u2013&nbsp;&nbsp; 1,212m<\/li>\n\n\n\n<li>H155&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; \u2013&nbsp;&nbsp; 1,169m<\/li>\n<\/ul>\n\n\n\n<p>R\u016fzn\u00e9 impedance jsem volil kv\u016fli impedan\u010dn\u00edmu p\u0159izp\u016fsoben\u00ed mezi jednotliv\u00fdmi dutinami, p\u0159ipou\u0161t\u00edm \u017ee je to jist\u00e1 alchymie:) V t\u00e9to f\u00e1zi je nenahraditeln\u00fdm pomocn\u00edkem m\u011b\u0159i\u010d impedance, ja pou\u017e\u00edval MAX6 Antenna analyzer kter\u00fd mi laskav\u011b zap\u016fj\u010dil Petr OK2ZAR.<\/p>\n\n\n\n<p><strong>Teplotn\u00ed stabilita:<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><\/td><td>M\u011b\u0159en\u00ed teplotn\u00ed stability dutiny Helical \u2013 Notch<\/td><td><\/td><\/tr><tr><td><\/td><td>RX \u010d\u00e1st \u2013 m\u011b\u0159ena pouze jedna dutina na 1\/4 lambda veden\u00ed<\/td><td><\/td><\/tr><tr><td>Datum:<\/td><td>25.8.2015<\/td><td><\/td><td><\/td><td><\/td><td><\/td><\/tr><tr><td>Teplom\u011br:<\/td><td>Infra\u010derven\u00fd<\/td><td><\/td><td><\/td><td><\/td><\/tr><tr><td>M\u011b\u0159\u00edc\u00ed p\u0159\u00edstroj:<\/td><td>R8000A-General Dynamics<\/td><td><\/td><td><\/td><\/tr><tr><td>Teplota v m\u00edstnosti:<\/td><td>23\u02daC<\/td><td><\/td><td><\/td><td><\/td><\/tr><tr><td><\/td><td><\/td><td><\/td><td><\/td><td><\/td><td><\/td><\/tr><tr><td>M\u011b\u0159. \u010d\u00eds.<\/td><td>\u010cas m\u011b\u0159en\u00ed<\/td><td>Teplota dutiny [\u02daC]<\/td><td>Notch maximum [MHz]<\/td><td><\/td><td><\/td><\/tr><tr><td>1. m\u011b\u0159en\u00ed<\/td><td><\/td><td><\/td><td><\/td><td><\/td><\/tr><tr><td>1<\/td><td>7:45<\/td><td>24<\/td><td>51,971<\/td><td><\/td><td><\/td><\/tr><tr><td>2<\/td><td>8:17<\/td><td>-9<\/td><td>51,995<\/td><td><\/td><td><\/td><\/tr><tr><td>3<\/td><td>8:19<\/td><td>-1<\/td><td>51,995<\/td><td><\/td><td><\/td><\/tr><tr><td>4<\/td><td>8:19<\/td><td>4<\/td><td>51,991<\/td><td><\/td><td><\/td><\/tr><tr><td>5<\/td><td>8:20<\/td><td>8<\/td><td>51,988<\/td><td><\/td><td><\/td><\/tr><tr><td>6<\/td><td>8:20<\/td><td>12<\/td><td>51,985<\/td><td><\/td><td><\/td><\/tr><tr><td>7<\/td><td>8:22<\/td><td>13<\/td><td>51,981<\/td><td><\/td><td><\/td><\/tr><tr><td>8<\/td><td>8:24<\/td><td>15<\/td><td>51,977<\/td><td><\/td><td><\/td><\/tr><tr><td>9<\/td><td>8:26<\/td><td>17<\/td><td>51,977<\/td><td><\/td><td><\/td><\/tr><tr><td>10<\/td><td>8:28<\/td><td>18<\/td><td>51,972<\/td><td><\/td><td><\/td><\/tr><tr><td>2. m\u011b\u0159en\u00ed<\/td><td><\/td><td><\/td><td><\/td><td><\/td><\/tr><tr><td>1<\/td><td>9:22<\/td><td>25<\/td><td>51,972<\/td><td><\/td><td><\/td><\/tr><tr><td>2<\/td><td>10:18<\/td><td>-15<\/td><td>51,997<\/td><td><\/td><td><\/td><\/tr><tr><td>3<\/td><td>10:20<\/td><td>-8<\/td><td>51,992<\/td><td><\/td><td><\/td><\/tr><tr><td>4<\/td><td>10:21<\/td><td>0<\/td><td>51,99<\/td><td><\/td><td><\/td><\/tr><tr><td>5<\/td><td>10:23<\/td><td>8<\/td><td>51,987<\/td><td><\/td><td><\/td><\/tr><tr><td>6<\/td><td>10:24<\/td><td>13<\/td><td>51,982<\/td><td><\/td><td><\/td><\/tr><tr><td>7<\/td><td>10:26<\/td><td>15<\/td><td>51,982<\/td><td><\/td><td><\/td><\/tr><tr><td>8<\/td><td>10:28<\/td><td>17<\/td><td>51,977<\/td><td><\/td><td><\/td><\/tr><tr><td>9<\/td><td>10:30<\/td><td>18<\/td><td>51,977<\/td><td><\/td><td><\/td><\/tr><tr><td>10<\/td><td>10:33<\/td><td>19<\/td><td>51,972<\/td><td><\/td><td><\/td><\/tr><tr><td>11<\/td><td>10:42<\/td><td>22<\/td><td>51,967<\/td><td><\/td><td><\/td><\/tr><tr><td><\/td><td><\/td><td><\/td><td><\/td><td><\/td><td><\/td><\/tr><tr><td><\/td><td><\/td><td><\/td><td><\/td><td><\/td><td><\/td><\/tr><tr><td><\/td><td><\/td><td><\/td><td><\/td><td><\/td><td><\/td><\/tr><tr><td><\/td><td><\/td><td><\/td><td><\/td><td><\/td><td><\/td><\/tr><tr><td>Duplexer Sinclair MR356*2 pro porovn\u00e1n\u00ed<\/td><td><\/td><td><\/td><td><\/td><\/tr><tr><td><\/td><td><\/td><td><\/td><td><\/td><td><\/td><td><\/td><\/tr><tr><td>1<\/td><td>9:00<\/td><td>25<\/td><td>438,725<\/td><td><\/td><td><\/td><\/tr><tr><td>2<\/td><td>9:30<\/td><td>-15<\/td><td>438,33<\/td><td><\/td><td><\/td><\/tr><tr><td><\/td><td><\/td><td><\/td><td><\/td><td><\/td><td><\/td><\/tr><tr><td>10x vy\u0161\u0161\u00ed kmito\u010det 20x vy\u0161\u0161\u00ed chyba.<\/td><td><\/td><td><\/td><td><\/td><\/tr><tr><td><\/td><td><\/td><td><\/td><td><\/td><td><\/td><td><\/td><\/tr><tr><td><\/td><td><\/td><td><\/td><td><\/td><td><\/td><td><\/td><\/tr><tr><td><\/td><td><\/td><td><\/td><td><\/td><td><\/td><td><\/td><\/tr><tr><td><\/td><td><\/td><td><\/td><td><\/td><td><\/td><td><\/td><\/tr><tr><td><\/td><td><\/td><td><\/td><td><\/td><td><\/td><td><\/td><\/tr><tr><td><\/td><td><\/td><td><\/td><td><\/td><td><\/td><td><\/td><\/tr><tr><td><\/td><td><\/td><td><\/td><td><\/td><td><\/td><td><\/td><\/tr><tr><td><\/td><td><\/td><td><\/td><td><\/td><td><\/td><td><\/td><\/tr><tr><td>M\u011b\u0159en\u00ed dvojice dutin NOTCH na 1\/4 lambda veden\u00edch<\/td><td><\/td><td><\/td><\/tr><tr><td><\/td><td><\/td><td><\/td><td><\/td><td><\/td><td><\/td><\/tr><tr><td><\/td><td><\/td><td><\/td><td><\/td><td><\/td><td><\/td><\/tr><tr><td>M\u011b\u0159. \u010d\u00eds.<\/td><td>\u010cas m\u011b\u0159en\u00ed<\/td><td>Teplota dutin [\u02daC]<\/td><td>Notch maximum [MHz]<\/td><td>\u00datlum 970<\/td><td>\u00datlum 370<\/td><\/tr><tr><td>1<\/td><td>10:51<\/td><td>24<\/td><td>51,965<\/td><td>-34<\/td><td>-2<\/td><\/tr><tr><td>2<\/td><td>12:24<\/td><td>-15<\/td><td>51,983<\/td><td>-31<\/td><td>-1,7<\/td><\/tr><tr><td>3<\/td><td>12:26<\/td><td>-5<\/td><td>51,983<\/td><td>-32<\/td><td>-1,7<\/td><\/tr><tr><td>4<\/td><td>12:27<\/td><td>-3<\/td><td>51,983<\/td><td>-34<\/td><td>-1,8<\/td><\/tr><tr><td>5<\/td><td>12:28<\/td><td>6<\/td><td>51,975<\/td><td>-35<\/td><td>-1,9<\/td><\/tr><tr><td>6<\/td><td>12:29<\/td><td>11<\/td><td>51,964<\/td><td>-35<\/td><td>-1,9<\/td><\/tr><tr><td>7<\/td><td>12:30<\/td><td>13<\/td><td>51,965<\/td><td>-35<\/td><td>-2<\/td><\/tr><tr><td>8<\/td><td>12:31<\/td><td>15<\/td><td>51,96<\/td><td>-34<\/td><td>-2<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong>\u010casov\u00e1 n\u00e1ro\u010dnost:<\/strong><\/p>\n\n\n\n<p>N\u00e1vrh, v\u00fdpo\u010dty a samotn\u00e1 stavba Helical rezon\u00e1tor\u016f a veden\u00ed k nim vy\u0161la na cca 220 hodin b\u011bhem 3 m\u011bs\u00edc\u016f.<\/p>\n\n\n\n<p><strong>Finan\u010dn\u00ed n\u00e1ro\u010dnost:<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>V\u00fdpo\u010det \u010dasov\u00e9 n\u00e1ro\u010dnosti p\u0159i stavb\u011b OK0MF<\/td><\/tr><tr><td><\/td><td><\/td><td><\/td><td><\/td><td><\/td><td><\/td><\/tr><tr><td>Celkov\u00e9 n\u00e1klady:<\/td><td>24945<\/td><td>K\u010d<\/td><td><\/td><td><\/td><\/tr><tr><td><\/td><td><\/td><td><\/td><td><\/td><td><\/td><td><\/td><\/tr><tr><td>V\u00fdroba Duplexeru<\/td><td><\/td><td>220<\/td><td>Hodin<\/td><td><\/td><\/tr><tr><td><\/td><td><\/td><td><\/td><td><\/td><td><\/td><td><\/td><\/tr><tr><td>Materi\u00e1l duplexer<\/td><td><\/td><td><\/td><td><\/td><td><\/td><\/tr><tr><td><\/td><td><\/td><td><\/td><td><\/td><td><\/td><td><\/td><\/tr><tr><td>CU roura 80mm\/2m<\/td><td><\/td><td>750<\/td><td>K\u010d<\/td><td><\/td><\/tr><tr><td>Dr\u00e1t na vinut\u00ed c\u00edvek 25m<\/td><td>500<\/td><td>K\u010d<\/td><td><\/td><\/tr><tr><td>Konektory N<\/td><td><\/td><td>200<\/td><td>K\u010d<\/td><td><\/td><\/tr><tr><td>Konektory BNC 7x<\/td><td><\/td><td>120<\/td><td>K\u010d<\/td><td><\/td><\/tr><tr><td>Koaxi\u00e1ly 15m<\/td><td><\/td><td>375<\/td><td>K\u010d<\/td><td><\/td><\/tr><tr><td>Transportn\u00ed \/ kryc\u00ed bedny<\/td><td>700<\/td><td>K\u010d<\/td><td><\/td><\/tr><tr><td>Tisk kryc\u00edch krabi\u010dek (5ks)<\/td><td>300<\/td><td>K\u010d<\/td><td><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><em><strong>OK0MF je v \u010cR v\u016fbec prvn\u00edm funguj\u00edc\u00edm p\u0159evad\u011b\u010dem na 6m, svou konstrukc\u00ed je unik\u00e1tn\u00ed, mnoho d\u00edl\u010d\u00edch \u010d\u00e1st\u00ed jsme pou\u017eili \u201cpoprv\u00e9\u201d v na\u0161em prost\u0159ed\u00ed.&nbsp; Budeme r\u00e1di za V\u00e1mi zaslan\u00e9 reporty a informace o za\u0159\u00edzen\u00ed s jak\u00fdm jste spojen\u00ed d\u011blali.<br><\/strong><\/em><\/p>\n\n\n\n<p>Nakonec bych r\u00e1d pod\u011bkoval m\u00e9mu p\u0159\u00edteli Carlosi H\u00e9rnandezovi, kter\u00fd mi byl teoretickou oporou a velmi usnadnil v\u00fdvoj.<\/p>\n\n\n\n<p>Zdroje:<\/p>\n\n\n\n<p>1\/&nbsp;&nbsp; <a href=\"http:\/\/oh2btg.blogspot.cz\/2015\/03\/6m-50mhz-duplexer-for-repeater-do-it.html\" target=\"_blank\" rel=\"noreferrer noopener\">http:\/\/oh2btg.blogspot.cz\/2015\/03\/6m-50mhz-duplexer-for-repeater-do-it.html<\/a><\/p>\n\n\n\n<p>2\/&nbsp;&nbsp; <a href=\"http:\/\/www.repeater-builder.com\/antenna\/heliax-6m-filter.html\" target=\"_blank\" rel=\"noreferrer noopener\">http:\/\/www.repeater-builder.com\/antenna\/heliax-6m-filter.html<\/a><\/p>\n\n\n\n<p>3\/&nbsp;&nbsp; <a href=\"http:\/\/www.hubbatech.com.au\/AMATEUR%20RADIO\/RF%20Filters\/Rf%20Filters.htm\" target=\"_blank\" rel=\"noreferrer noopener\">http:\/\/www.hubbatech.com.au\/AMATEUR%20RADIO\/RF%20Filters\/Rf%20Filters.htm<\/a><\/p>\n\n\n\n<p>4\/&nbsp;&nbsp; <a href=\"http:\/\/www.pa0nhc.nl\/IMDfilter\/EN\/Notch\/Single\/HelicalNotchfilters2mEN.htm\" target=\"_blank\" rel=\"noreferrer noopener\">http:\/\/www.pa0nhc.nl\/IMDfilter\/EN\/Notch\/Single\/HelicalNotchfilters2mEN.htm<\/a><\/p>\n\n\n\n<p>5\/&nbsp;&nbsp; <a href=\"http:\/\/www.qsl.net\/k5jmp\/Six_Meter_Heliax_and_Helical_Duplexer_info\/01duplex.PDF\" target=\"_blank\" rel=\"noreferrer noopener\">http:\/\/www.qsl.net\/k5jmp\/Six_Meter_Heliax_and_Helical_Duplexer_info\/01duplex.PDF<\/a><\/p>\n\n\n\n<p>6\/&nbsp;&nbsp; <a href=\"http:\/\/www.qsl.net\/n1irz\/sixmeter.html\" target=\"_blank\" rel=\"noreferrer noopener\">http:\/\/www.qsl.net\/n1irz\/sixmeter.html<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u2026Je to bezvadn\u00e9 p\u00e1smo, kdy\u017e m\u00e1te to \u0161t\u011bst\u00ed a Matka P\u0159\u00edroda zat\u00e1hne za \u0159et\u011bz\u2026 \u201cP\u0159i stavb\u011b 6m p\u0159evad\u011b\u010de OK0MF na m\u011b p\u0159ipadl \u00fakol vy\u0159e\u0161it ant\u00e9nn\u00ed filtraci \/ duplexer. Duplexer na 50MHz jsme samoz\u0159ejm\u011b nem\u011bli a jeho po\u0159\u00edzen\u00ed by p\u0159evad\u011b\u010d zna\u010dn\u011b <a class=\"more-link\" href=\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/2015\/10\/jak-jsem-delal-antenni-filtry-pro-ok0mf\/\">Pokra\u010duj ve \u010dten\u00ed \u2192<\/a><\/p>\n","protected":false},"author":1,"featured_media":546,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12],"tags":[],"class_list":["post-4387","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nezarazene-cs"],"_links":{"self":[{"href":"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-json\/wp\/v2\/posts\/4387","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-json\/wp\/v2\/comments?post=4387"}],"version-history":[{"count":5,"href":"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-json\/wp\/v2\/posts\/4387\/revisions"}],"predecessor-version":[{"id":4439,"href":"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-json\/wp\/v2\/posts\/4387\/revisions\/4439"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-json\/wp\/v2\/media\/546"}],"wp:attachment":[{"href":"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-json\/wp\/v2\/media?parent=4387"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-json\/wp\/v2\/categories?post=4387"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-json\/wp\/v2\/tags?post=4387"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}