Momwe Mungakhalire Mlongoti wa NVIS Antenna AKA Cloud Burner Antenna Pogwiritsa Ntchito Mag Mount

Gawo lokhala dalaivala wa wailesi ya ham ndikupereka mauthenga panthawi zadzidzidzi. Ndi Tsiku la Antenna la Ohio NVIS lomwe likubwera, ndinasankha kuyang'ana muzitsulo za NVIS. Tinyanga ta NVIS, zomwe zimatchedwanso Near Event Vertical Skywave tinyanga tating'onoting'ono tokhala ndi ma radiation. Chinachake pa dongosolo la madigiri 60, kuti mwachindunji 90 madigiri. Mosiyana ndi ma siginecha a UHF ndi VHF, omwe nthawi zambiri amakhala ndi mtunda wamakilomita 50 wokhala ndi mlongoti wa yagi mmwamba, komanso mlongoti wa NVIS umapangidwa kuti ugwirizane ndi mitundu ya 75-- 500-mile. Nthawi zina mlongoti wa NVIS umatchedwa "chotenthetsera mitambo" chifukwa umatulutsa ma radiation ambiri m'mwamba kuposa mlongoti wamba.

Lingaliro lokhala ndi mlongoti wa NVIS ndikutulutsa mphamvu zambiri momwe mungathere pamtunda wapamwamba komanso kuti ziwonekere kuchokera ku ionosphere. Kuchokera pamawonekedwe ogwirira ntchito, kulumikizana kwa NVIS kumachitika pa 10 MHz komanso pansipa. Gawo linanso la mlongoti wa NVIS ndilowona kuti ndilotsika kwambiri. Izi zimathandizira kutulutsa chizindikirocho pamtunda wapamwamba, komanso kupangitsa kuti ikhale yosavuta kumasula. Pali malingaliro ambiri okhudzana ndi kutalika kothandiza kwambiri kwa mlongoti wa NVIS, komabe, aliyense akuwoneka kuti akukhazikika. 1/8 wavelength pamwamba pa nthaka ndipo nthawi zambiri zochepa.

Ndinkafuna mlongoti wa NVIS womwe unali wonyamulika, wosavuta kukhazikitsa, komanso wotsika mtengo (ndithudi). Pomaliza, ndinali ndi chilichonse chothandiza. Kwa mlongoti wanga wa NVIS, ndinayamba ndi malo anga a 2-mita a galimoto yanga. Pambuyo pake, inali chabe nkhani yomata chingwe cha quarter-wave ku phiri la mag, ndiyeno kungomangirira chingwecho kukhala chophwatalala kuchoka pamalo a mphutsi ku mtengo kapena mtengo wamtundu wina.

Ndinkafuna kuti ndizitha kulumikizana ndi malo a mag mwachangu. Ndinapanga kapepala ka batri kodzaza masika. Koma osati chojambula chilichonse cha batri. Iyo inali ndi kuthekera koyimirira mpaka kukoka mwamphamvu popanda kutuluka pa mlongoti wa mag mount. Zomwe ndimaganiza zikuwonetsedwa pachithunzi chomwe chili pansipa:

Nthawi zina izi zimatchedwa Crocodile battery Clips, kapena Test Clips. Ndinasankha ndekha pamalo ogulitsira zida zamagalimoto a NAPA. Pali mitundu ingapo yosiyana. Muyenera kuwonetsetsa kuti nsagwada zikukulirakulira mokwanira kuti zitetezeke pamunsi pa mag install yomwe mukugwiritsa ntchito.

Chifukwa chake pakadali pano ndi nkhani yosavuta kulumikiza chingwe pa clamp iyi. Ndidasankha kuchotsa zomangira kumbuyo kwa chotchinga ndikuyika chingwe ndikubowo ndikugulitsa chingwecho pachimake. Zothandizira izi zimapereka kulimba kwambiri chifukwa cholumikizirachi chidzakhala chopanikizika.

Pansipa pali chithunzi cha mlongoti wanga wa NVIS pamwamba pa Jeep yanga yomwe imagwiritsa ntchito malo amphamvu:

Ponena za kutalika kwa waya woti ndigwiritse ntchito, mwa ine, ndikugwiritsa ntchito mita 40 pa Tsiku la Antenna la Ohio NVIS. Wina angakhulupirire kuti njira yachikale yoyimirira ya kotala ya wavelength ingagwire ntchito. Komabe, izi zikuwoneka kuti sizowona. Popeza kuti mlongoti wa NVIS ndi waufupi komanso pafupi ndi galimoto, kuyesa kwanga koyamba kugwiritsa ntchito fomula 234/ freq. kupeza kukula kwa waya kunandipatsa kugwedezeka kwa 8.6 MHz. Mwa njira, kukhala ndi MFJ antenna analyzer kumathandiza kwambiri ndi njirayi. Ndili ndi chidziwitsochi, ndidaganiziranso ndikuganizira zanga nthawi zonse kuti ndiwerengere kutalika koyenera kwa mtundu uwu wa mlongoti wa NVIS. Izi sizikutanthauza kuti izi zaponyedwa mwala, komabe izi ndi zomwe zinandithandiza, osachepera nthawi ino.

Njira yatsopano yomwe ndapanga ndi iyi:

Utali (ft.) = 261/ F (mhz).

Pansipa pali chithunzi chowonjezera cha mlongoti wanga wa NVIS womwe wayikidwa kwathunthu. Zindikirani kuti pamapeto pake ndikugwiritsa ntchito mitengo ya hema ya 2 4 ft.

Zotsatira zanga zoyambira zikuwonetsa kuti ikuwoneka kuti ikugwira ntchito bwino pa mlongoti wa NVIS. Ndikhalanso ndikuphatikiza mwendo wamamita 75 ndikukhazikitsanso mtsogolomo. Imeneyi ndi nkhani yosavuta yogawa chingwe, kuphatikizapo cholembera kuti chigwirizane ndi mag install, komanso kumasula.

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