{"id":130,"date":"2022-04-01T13:01:36","date_gmt":"2022-04-01T11:01:36","guid":{"rendered":"http:\/\/www.ok2wy.com\/?p=130"},"modified":"2022-04-01T13:10:19","modified_gmt":"2022-04-01T11:10:19","slug":"uprava-mikrofonu-motorola-pmr-pro-radioamaterske-ucely","status":"publish","type":"post","link":"http:\/\/www.ok2wy.com\/?p=130","title":{"rendered":"\u00daprava mikrofonu Motorola PMR pro radioamat\u00e9rsk\u00e9 \u00fa\u010dely"},"content":{"rendered":"\n

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\u0158e\u0161il jsem jak\u00fd mikrofon pou\u017e\u00edt k m\u00e9mu SunSDR2 DX TRX. V \u0161upl\u00edku se mi v\u00e1lel jak\u00fdsi Yaesu fake mikrofon z Aliexpressu, jeho\u017e jedinou v\u00fdhodou bylo, \u017ee st\u00e1l skoro nic. Modulace z n\u011bj byla ploch\u00e1 se spoustou ru\u0161iv\u00fdch zvuk\u016f zp\u016fsoben\u00fdch dechem a vrz\u00e1n\u00edm tla\u010d\u00edtka PTT. To m\u011b srovna neuspokojovalo, ale vzpomn\u011bl jsem si, \u017ee n\u011bkde v z\u00e1sob\u00e1ch ur\u010dit\u011b najdu je\u0161t\u011b n\u011bjak\u00fd mikrofon k radiostanic\u00edm Motorola z dob, kdy jsem se radiostanicemi \u017eivil.
V\u00fdhodou t\u011bchto mikrofon\u016f je krom\u011b robustnosti zejm\u00e9na jejich pod\u00e1n\u00ed modulace. Moc nebudu p\u0159eh\u00e1n\u011bt, kdy\u017e \u0159eknu \u017ee pro n\u00e1\u0161 \u00fa\u010del str\u010d\u00ed do kapsy kdejak\u00e9 ty Shure a Heil nale\u0161t\u011bn\u00e9 legendy za p\u0159ehnan\u00e9 pen\u00edze. A taky jsou b\u011b\u017en\u011b dostupn\u00e9.<\/p>\n

Schema p\u016fvodn\u00edho mikrofonu (MDRMN4025, ale star\u0161\u00ed typy pou\u017e\u00edvaj\u00ed stejn\u00fd obvod)<\/p>\n

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\u017dlut\u011b ozna\u010den\u00e9 obvody jsou specifick\u00e9 pro radiostanice MOTOROLA, p\u016fjdou pry\u010d. Z\u016fstane jen obvod pro nap\u00e1jen\u00ed elektretov\u00e9 mikrofonn\u00ed vlo\u017eky a vazebn\u00ed kondenz\u00e1tor na jej\u00edm v\u00fdstupu.<\/p>\n

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Bohu\u017eel pou\u017eit\u00fd kabel je nest\u00edn\u011bn\u00fd, proto\u017ee Motorola pou\u017e\u00edv\u00e1 dost velkou \u00farove\u0148 sign\u00e1lu z mikrofonu. M\u00e1 p\u0159edzesilova\u010d vestav\u011bn\u00fd p\u0159\u00edmo v mikrofonu a vstup v radiostanici u\u017e nemus\u00ed b\u00fdt tolik citliv\u00fd, proto nejsou n\u00e1roky na st\u00edn\u011bn\u00ed kabelu. To ov\u0161em v na\u0161em p\u0159\u00edpad\u011b vad\u00ed, proto jsem p\u016fvodn\u00ed kabel nepou\u017eil a vzal jsem rad\u011bji st\u00edn\u011bn\u00fd kabel z toho \u010d\u00ednsk\u00e9ho \u0161mejdu z Aliexpressu.<\/p>\n

Z PCB jsem odstranil \u010derven\u011b ozna\u010den\u00e9 nepot\u0159ebn\u00e9 komponenty v\u010detn\u011b konektoru:<\/p>\n

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Z druh\u00e9 strany PCB je t\u0159eba propojit jeden pin tla\u010d\u00edtka PTT se zem\u00ed:<\/p>\n

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Kabel jsem p\u0159ip\u00e1jel p\u0159\u00edmo na PCB do ozna\u010den\u00fdch bod\u016f:<\/p>\n

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A je skoro hotovo. Nezapome\u0148te p\u0159i sestavov\u00e1n\u00ed pouzdra d\u00e1t zp\u011bt ten gumov\u00fd k\u00f3nus na mikrofon. V\u00fdsledek je podle o\u010dek\u00e1v\u00e1n\u00ed dokonal\u00fd.<\/p>\n

Nap\u00e1jec\u00ed nap\u011bt\u00ed pro elektretovou vlo\u017eku nemus\u00ed b\u00fdt pochopiteln\u011b zrovna 5 V (je k dispozici na mikrofonn\u00edm konektoru SunSDR2), V Motorole samotn\u00e9 pou\u017e\u00edvaj\u00ed 12 V a stejn\u011b dokonale to funguje i s 8 V, kter\u00e9 jsou k dispozici na mikrofonn\u00edm konektoru transceiver\u016f ICOM.<\/p>\n

(C) 2022 OK2WY<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

\u0158e\u0161il jsem jak\u00fd mikrofon pou\u017e\u00edt k m\u00e9mu SunSDR2 DX TRX. V \u0161upl\u00edku se mi v\u00e1lel jak\u00fdsi Yaesu fake mikrofon z Aliexpressu, jeho\u017e jedinou v\u00fdhodou bylo, \u017ee st\u00e1l skoro nic. Modulace z n\u011bj byla ploch\u00e1 se spoustou ru\u0161iv\u00fdch zvuk\u016f zp\u016fsoben\u00fdch dechem a vrz\u00e1n\u00edm tla\u010d\u00edtka PTT. To m\u011b srovna neuspokojovalo, ale vzpomn\u011bl jsem si, \u017ee n\u011bkde v […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-130","post","type-post","status-publish","format-standard","hentry","category-nezarazene"],"_links":{"self":[{"href":"http:\/\/www.ok2wy.com\/index.php?rest_route=\/wp\/v2\/posts\/130","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.ok2wy.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.ok2wy.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.ok2wy.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.ok2wy.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=130"}],"version-history":[{"count":2,"href":"http:\/\/www.ok2wy.com\/index.php?rest_route=\/wp\/v2\/posts\/130\/revisions"}],"predecessor-version":[{"id":138,"href":"http:\/\/www.ok2wy.com\/index.php?rest_route=\/wp\/v2\/posts\/130\/revisions\/138"}],"wp:attachment":[{"href":"http:\/\/www.ok2wy.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=130"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.ok2wy.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=130"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.ok2wy.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=130"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}