{"id":1854,"date":"2022-05-27T17:16:33","date_gmt":"2022-05-27T17:16:33","guid":{"rendered":"https:\/\/csiag.eu\/?p=1854"},"modified":"2022-12-31T06:46:31","modified_gmt":"2022-12-31T06:46:31","slug":"cb-radio-v-obytnych-automobilech","status":"publish","type":"post","link":"https:\/\/csiag.eu\/cs\/blog\/2022\/05\/27\/cb-funk-im-wohnmobil\/","title":{"rendered":"R\u00e1dio CB v obytn\u00fdch automobilech"},"content":{"rendered":"Doba \u010dten\u00ed<\/span> 2<\/span> minuty<\/span><\/span>\n

R\u00e1dio CB - star\u00fdm zn\u00e1m\u00e9, dnes st\u00e1le aktu\u00e1ln\u011bj\u0161\u00ed.<\/p>\n\n\n\n

Vozy, s v\u00fdjimkou osv\u011bd\u010den\u00e9ho Trabbi, maj\u00ed obvykle pevnou plechovou st\u0159echu. V minulosti se se sm\u00ed\u0161en\u00fdmi pocity vrtal uprost\u0159ed st\u0159echy otvor pro z\u00e1kladnu ant\u00e9ny, p\u0159i\u010dem\u017e se dbalo na to, aby byla zaji\u0161t\u011bna pevn\u00e1 hmota a \u010dist\u00e1 stojat\u00e1 vlna.<\/p>\n\n\n\n

U obytn\u00fdch voz\u016f s lamin\u00e1tovou nebo hlin\u00edkovou st\u0159echou je situace zcela odli\u0161n\u00e1: Bez ant\u00e9ny bez uzemn\u011bn\u00ed je to bez \u0161ance.<\/p>\n\n\n\n

A d\u00e9lka ant\u00e9ny, \u010d\u00edm del\u0161\u00ed, t\u00edm lep\u0161\u00ed - p\u0159\u00edjem a dosah - je velmi omezen\u00e1 na ji\u017e vysok\u00e9 obytn\u00e9 auto. Maxim\u00e1ln\u00ed p\u0159\u00edpustn\u00e1 v\u00fd\u0161ka je 410 cm - vzpome\u0148te si nap\u0159\u00edklad na v\u00fd\u0161kovou regulaci v tunelu na Labi. Pro CB ant\u00e9nu tak obvykle zb\u00fdv\u00e1 pouh\u00fdch 100 cm.<\/p>\n\n\n\n

Zpo\u010d\u00e1tku jsem zkou\u0161el \u0161t\u011bst\u00ed s Albrechtem McKinleyem. Jak se brzy uk\u00e1zalo, nebyl to dobr\u00fd n\u00e1pad: nam\u00edsto 4 W m\u011b\u0159en\u00fd v\u00fdkon 2 W, velmi omezen\u00e1 modulace a \u017e\u00e1dn\u00e9 zlep\u0161en\u00ed ani s po\u0159\u00e1dn\u00fdm mikrofonn\u00edm p\u0159edzesilova\u010dem.
Anal\u00fdza spot\u0159ebi\u010de uk\u00e1zala, \u017ee nebyl \u0159\u00e1dn\u011b kalibrov\u00e1n ve v\u00fdrobn\u00edm z\u00e1vod\u011b, tj. byl dod\u00e1n vadn\u00fd spot\u0159ebi\u010d. Po oprav\u011b r\u016fzn\u00fdch nastaven\u00ed spot\u0159ebi\u010d poskytoval o\u010dek\u00e1van\u00e9 hodnoty.<\/p>\n\n\n\n

Obytn\u00e9 automobily se st\u0159echou ze sklolamin\u00e1tu nebo hlin\u00edku postr\u00e1daj\u00ed elektrickou hmotnost. Ant\u00e9na Racer 90 proto dosahuje pouze stojat\u00e9 vlny kolem 2,0. Gamma 2F<\/a> Fyzik\u00e1ln\u00ed \u0161\u00ed\u0159en\u00ed r\u00e1diov\u00fdch vln s takov\u00fdmi ant\u00e9nami samoz\u0159ejm\u011b nen\u00ed ide\u00e1ln\u00ed, ale je u\u017eite\u010dn\u011bj\u0161\u00ed ne\u017e se \u0161patnou stojatou vlnou.<\/p>\n\n\n\n

Pokud chcete dos\u00e1hnout slu\u0161n\u00e9ho dosahu na stran\u011b p\u0159\u00edjmu i vys\u00edl\u00e1n\u00ed, neobejdete se bez pevn\u00e9 ant\u00e9ny. V obytn\u00e9m automobilu je to obt\u00ed\u017en\u00e9, ale ne nemo\u017en\u00e9.<\/p>\n\n\n\n

To vy\u017eaduje stabiln\u00ed Hlin\u00edkov\u00fd posuvn\u00fd sto\u017e\u00e1r<\/a>1,34 m dlouh\u00fd ve zata\u017een\u00e9m stavu, 10 m ve vysunut\u00e9m stavu p\u0159i hmotnosti pouh\u00fdch 9,6 kg, a stani\u010dn\u00ed ant\u00e9na z GRP s trvalou nosnost\u00ed a\u017e 500 W, jako je nap\u0159. Sirio Gainmaster \u215d<\/a> (Datov\u00fd list<\/a>) o d\u00e9lce 7,36 m, v demontovan\u00e9m stavu 1,95 m, a tedy jen st\u011b\u017e\u00ed vhodn\u00fd pro zadn\u00ed gar\u00e1\u017e.<\/p>\n\n\n\n

Pro\u010d ne sto\u017e\u00e1r ze sklolamin\u00e1tu? Ty jsou p\u0159i dlouhodob\u00e9m mobiln\u00edm pou\u017eit\u00ed p\u0159\u00edli\u0161 citliv\u00e9, proto\u017ee sklolamin\u00e1tov\u00e1 trubka m\u00e1 tendenci se p\u0159i utahov\u00e1n\u00ed trubkov\u00fdch svorek l\u00e1mat.
I hlin\u00edkov\u00e1 trubka, by\u0165 eloxovan\u00e1, je citliv\u00e1 na prach a ne\u010distoty, a proto by m\u011bla b\u00fdt v\u017edy z velk\u00e9 \u010d\u00e1sti bez nich.<\/p>\n\n\n\n

Posuvn\u00fd sto\u017e\u00e1r je namontov\u00e1n v zadn\u00ed \u010d\u00e1sti obytn\u00e9ho vozu nad n\u00e1razn\u00edkem na zadn\u00ed st\u011bn\u011b. Vysoce kvalitn\u00ed ant\u00e9nn\u00ed kabel je polo\u017een uvnit\u0159 trubek sto\u017e\u00e1ru a p\u0159ipojen ke konci nejvnit\u0159n\u011bj\u0161\u00ed trubky pomoc\u00ed kabelu. V\u00ed\u010dko sto\u017e\u00e1ru<\/a> venku. K n\u011bmu je p\u0159ipojen prefabrikovan\u00fd kabel Gainmasteru.<\/p>\n\n\n\n

Vnit\u0159n\u00ed ant\u00e9nn\u00ed kabel vede k jednomu ze dvou vstup\u016f ant\u00e9ny. P\u0159ep\u00edna\u010d ant\u00e9n<\/a>Na druh\u00fd vstup je p\u0159ipojen mobiln\u00ed p\u0159\u00edstroj Gamma 2F. To usnad\u0148uje p\u0159echod z mobiln\u00edho na stacion\u00e1rn\u00ed provoz.<\/p>\n\n\n\n

Pokud jsou k dispozici dv\u011b r\u00e1dia, lze ka\u017edou ant\u00e9nu p\u0159ipojit v\u00fdhradn\u011b (tj. nikoliv paraleln\u011b) ke ka\u017ed\u00e9mu z obou p\u0159ipojen\u00fdch r\u00e1di\u00ed pomoc\u00ed p\u0159\u00eddavn\u00e9ho ant\u00e9nn\u00edho p\u0159ep\u00edna\u010de, jeho\u017e dva vstupy jsou vz\u00e1jemn\u011b propojeny p\u0159\u00edmo pomoc\u00ed adapt\u00e9ru.<\/p>\n\n\n\n

Tip pro ty, kte\u0159\u00ed si r\u00e1di navrhuj\u00ed a stav\u00ed vlastn\u00ed ant\u00e9ny: ve frekven\u010dn\u00edm rozsahu od 50 kHz ... 1,5 GHz, se nanoVNA 4H<\/a> doporu\u010den\u00e1 pom\u016fcka.<\/p>","protected":false},"excerpt":{"rendered":"

Doba \u010dten\u00ed<\/span> 2<\/span> minuty<\/span><\/span>R\u00e1dio CB - star\u00fdm zn\u00e1m\u00e9, dnes st\u00e1le aktu\u00e1ln\u011bj\u0161\u00ed. Vozy, s v\u00fdjimkou l\u00e9ty prov\u011b\u0159en\u00e9ho Trabbi, maj\u00ed obvykle pevnou plechovou st\u0159echu. V minulosti m\u011bli lid\u00e9 sm\u00ed\u0161en\u00e9 pocity z toho, \u017ee uprost\u0159ed st\u0159echy vyvrtali otvor pro z\u00e1kladnu ant\u00e9ny, p\u0159i\u010dem\u017e dbali na to, aby byla zaji\u0161t\u011bna pevn\u00e1 hmota a mohli se t\u011b\u0161it z \u010dist\u00e9 stojat\u00e9 vlny. U obytn\u00fdch voz\u016f se st\u0159echami z lamin\u00e1tu nebo hlin\u00edku je to... \u010c\u00edst d\u00e1le \"R\u00e1dio CB v obytn\u00fdch automobilech<\/span><\/a><\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_lmt_disableupdate":"","_lmt_disable":"","neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"","neve_meta_content_width":0,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","footnotes":""},"categories":[359],"tags":[566,719,709,714,721,712,715,716,711,720,713,718,717,710],"class_list":["post-1854","post","type-post","status-publish","format-standard","hentry","category-cb-funk-im-wohnmobil","tag-antenne","tag-antennenumschalter","tag-cb-funk","tag-empfang","tag-gamma-2f","tag-masse","tag-masselose","tag-mast","tag-modukation","tag-nanovna","tag-reichweite","tag-schiebemast","tag-stationsantenne","tag-stehwelle"],"modified_by":"Achim Goerner","_links":{"self":[{"href":"https:\/\/csiag.eu\/cs\/wp-json\/wp\/v2\/posts\/1854","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/csiag.eu\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/csiag.eu\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/csiag.eu\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/csiag.eu\/cs\/wp-json\/wp\/v2\/comments?post=1854"}],"version-history":[{"count":0,"href":"https:\/\/csiag.eu\/cs\/wp-json\/wp\/v2\/posts\/1854\/revisions"}],"wp:attachment":[{"href":"https:\/\/csiag.eu\/cs\/wp-json\/wp\/v2\/media?parent=1854"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/csiag.eu\/cs\/wp-json\/wp\/v2\/categories?post=1854"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/csiag.eu\/cs\/wp-json\/wp\/v2\/tags?post=1854"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}