Ungayakha Kanjani I-Antenna engamamitha ama-2 Yeselula Yebhayisikili?

Mhlawumbe inkinga enkulu ngokuthatha ibhayisikili lakho le-HT ukucabanga ngothi olufanele ebhayisikilini lakho. Lokhu kungenxa yokuthi ibhayisikili alinikezi kakhulu indiza yaphansi. Ngithole okuthunyelwe ku-ARRL's Tips kanye ne-Kinks eyakhiwe nguCharlie Lofgren, W6JJZ, enesihloko esithi "The Bike 'n Walk Unique". Ngezansi izinhlelo ze-antenna azichazile eposini.

Le antenna iyi-1/2 wave i-dipole eqondile eyakhiwe nge-RG-58/ U coax. Isikhalo salo mklamo ukuthi ishibhile, kulula, futhi kulula kakhulu ukwenza ngezinto ezitholakala kalula. Irediyetha idinga ukufisa amasentimitha angu-39 ukuze isebenze ngamamitha angu-2. Engikusebenzisa kurediyetha, umqhubi omaphakathi we-RG-58/ U coax. Ngiqala ngocezu lwe-coax olungamamitha ayi-12. Emuva kwalokho kusele okwanele ukuze kuqhutshekwe nomsakazo. Ngigcina umsakazo wami esikhwameni sami sesibambo.

Isilinganiso sokuqala sokuthi irediyetha izoba isikhathi esingakanani, ngemva kwalokho nquma umgodla wangaphandle, kanye nonogada. Okulandelayo, ngakolunye uhlangothi lwe-coax, ngisuse into ye-coax okungenzeka ibe yi-short stub. Usayizi olungile uncike kusici sesivinini se-coax esetshenzisiwe (bheka ithebula elingezansi). Kuzo zonke izimo, ngihlala ngenza ubude ohlangothini olude. Ngale ndlela i-antenna ingasikwa ibe yimvamisa oyifunayo ngebhuloho le-SWR.

Kafushane umqhubi wendawo kunogada we-coax ephoyinti C

Izilinganiso zesigaba esifanayo zincike kusici sesivinini se-coax esetshenzisiwe.

Ukuze uxhumanise i-stub eshodayo kumugqa wokuphakelayo, susa kahle indawo encane yokwahlukanisa ku-conductor emaphakathi (engekho enkulu kuno-1/4 weyintshi). Solder futhi futhi tape i-conductor yangaphakathi, emva kwalokho hlanganisa futhi uthengise izihlangu. Ukuze uqinisekise ukuvikela okufanele, hlukanisa ucezu oluyisipele lwe-pigtail ngobude ngaphezu koxhumo lwehawu, futhi uhlanganise ngokucophelela isihlangu. Ekugcineni, misa uthi lwakho endaweni evulekile, futhi ulushune ngemitha ye-SWR. Ngithole ukuthi ukulungisa ubude be-shorting stub kunethonya elikhulu ekulungiseni i-minumim SWR.

Ngathenga i-fiberglass-flag-flag post esitolo sendawo samabhayisikili, ngaphinde ngaqopha uthi kuyo. Ungasebenzisa futhi amashubhu anciphisa ukushisa phezu kwesigxobo se-fiberglass kanye nekhebula, uma unikezwa. Ngithanda nokunamathisela isigxobo sedowel esingu-2 foot 1/4 inch engxenyeni engezansi yothi. Lokhu kusiza ukuyiqinisa ngenkathi ugibele, kanye neziswebhu ze-antenna ziye emuva naphambili kancane. Elinye iphuzu elisizayo ukwenza uthi lwe-antenna lube lukhuni kakhulu ukushelela entweni emfushane yeshubhu yasengadini futhi futhi ulivikele ukuze uqinisekise ukuthi lapho uhlaka lwakho lwebhayisikili ngaphambi kokuba lushaye uthi luzoshaya ipayipi lengadi kunalokho. Ekugcineni, ngisebenzisa "intambo ye-bungie" ezungeze irack yami yenkampani yenethiwekhi kanye ne-antenna ukuze ngithole usizo olwengeziwe.

Lolu thi lungakhiwa esikhathini esingangehora. Fisa "ukubamba" ibhayisikili elihambayo ngolunye usuku!