Ungayenza kanjani i-DIY ifushaniswe kusuka kumamitha angama-20 kuye kwangama-40 ku-POTA

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Kukhona okuthakazelisayo ngokwenza kusebenze i-POTA lapho ungena khona ngawo wonke amagiya akho ephaketheni futhi ucuphe ipaki elisebenzisa amandla e-QRP. Ngokunikezwa kwami ​​​​kwangempela okuphathelene ne-transceiver yami yokuqala ye-QCX-mini QRP, okwamanje ngine-QCX-mini eyengeziwe engivumela ukuthi ngisebenze ukwenza kusebenze kwami ​​i-POTA QRP ku-40, 30, kanye namamitha angu-20. Lokhu kusho ukuthi ngidinga ukwakha iselula encishisiwe eqondile yalawa mabhendi. Lesi sakhiwo esithile se-antenna sisekelwe ekumeni kwami ​​kokuqala Okuncishisiwe Kumamitha angama-40 kodwa kanye nokwengeza kokuba nekhono lokufinyeza ikhoyili elayishayo endaweni efanele yokuthinta ukudlidliza ku-30 ​​kanye namabhendi wamamitha angama-20.

 

Olunye udaba enganginalo nge-antenna yokuqala engamamitha angu-40, ukuthi ngasebenzisa ama-wave radial amabili angu-1/4, ukuhlakanipha kwendabuko okuthi kufanele ukusebenzise ngezimpondo eziqondile. Kumamitha angu-40, azungeze amafidi angu-33 ubude. Lokho kwenza kube nzima kakhulu ukukhulula ama-radial uma usebenzisa i-POTA enamandla kakhulu.

 

Ekwenzeni ukusesha kwewebhu ngithole ukuthi kungenzeka ukusebenzisa ama-radial angama-wavelength angu-1/8 ubude-- Yebo kubonakala kuhlanya nakimi, kodwa uma kuyiqiniso, ngemva kwalokho kungasiza kakhulu udaba lokuqaliswa kwe-radial 40 amamitha. Kuhlinzekwe ukusebenza kahle okwehlisiwe, kodwa ngabona kufanele ukudutshulwa. Okuningi ngalokhu kamuva.

 

Uma kubhekwa ukuthi njengamanje benginesigxobo sokudoba esingamamitha angu-20 esifushaniswe siqondile esingamamitha angu-40, yilokho engikusebenzisele le-antenna ye-multiband. Ngokucabangela ukuthi lokhu cishe kwakungenxa yamabhendi angu-3, ​​ngangifisa ukuthi ikhoyili yokulayisha incishiswe ngokwanele ukuze ngiqiniseke ukuthi ngingenza ukuguqulwa kwebhendi ngokushesha ngaphandle kokunciphisa ukuma okuqondile. Futhi, ngiye ngaya ekhasini lewebhu lekhoyili elifushanisiwe lesibali se-antenna elinginikeze izici zami zokuqala zekhoyili yokugcwalisa. Ukushuna le antenna kuwo wonke amabhendi ama-3 kubonakale kuyinkimbinkimbi kunokujwayelekile. Ukuqagela kwami ​​​​ukuthi ngisebenzisa ama-wave radial amabili kuphela angu-1/8.

 

Umdwebo ongezansi ubukhulu bami bokugcina. Ibanga lakho legesi lingahluka, nokho, yilokhu engigcine ngakho.

  

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Ngohlobo lwekhoyili yokugcwalisa, nginqume ukusebenzisa i-In Sink Tailpiece. Ukucabanga kwami ​​yilokhu, ngokuvamile abantu basebenzisa ipayipi elivamile le-PVC lohlobo lwekhoyili, elihle kakhulu, nokho ukuminyana kodonga lwepayipi kubonakala kuminyene ngokungadingekile esicelweni sami. Inkinga yami enkulu lapha bekuwukubeka ingcindezi nokukhathazeka okuncane kakhulu ocingweni oluyingxenye eqondile ye-antenna. Ishubhu elichichimayo le-commode lizacile kakhulu futhi lilula futhi lisebenza kahle kakhulu. Ububanzi bangaphandle beshubhu yami yokuchichima engamayintshi angu-1.5. Ngicabanga ukuthi usayizi wangaphandle ojwayelekile lowo. Ngisike iSink Tailpiece 3 1/2 amayintshi ubude, kodwa 2 1/2 ″ ngabe isebenze kahle kakhulu.

  

Ngisebenzise ikhoyili encishisiwe yokubala ethi i-antenna eqondile ngokusekelwe lapho ikhoyili itholakala khona esakhiweni esingenhla futhi ngenza inani eliphelele lokuphenduka kuka-33 ngompompi ngokuphenduka kuka-13 ukusuka phezulu kwekhoyili. Uma unentambo yegeji ehlukile, faka lokho kukhoyili ekubaleni okufushanisiwe kwe-antenna kunalokho.

  

Ekuqaleni ngakhe ikhoyili yokulayisha ngokujika okuhlukahlukene okubaliwe. Njengoba ekugcineni, ngadinga inductance eyengeziwe. Esithombeni esisekhasini elilandelayo ungabona phezulu ekujikeni kokugcina ngifake ikhebula eliningi kakhulu. Isifundo esifundiwe vunguza intambo eyengeziwe kukhoyili kunokunqunywa.

  

Ngezansi isithombe sekhoyili yokugcwalisa eyenziwe ngeshubhu elichichimayo:

   

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Ukwenza ikhoyili yokugcwalisa, ngibhoboze izimbobo ezintathu zezikulufu ezingenasici ezingu-6-32 ezingu-3/4 we-intshi ubude. Ngisebenzise izixhumi ze-crimp ukuxhuma ikhebuli yoqweqwe lwawo kanye nezikulufu. Uma usebenzisa ikhebula le-koqweqwe lwawo, qiniseka ukuthi ususa okokufaka ocingweni. Ngemuva kwalokho sebenzisa ama-adaptha e-kink ohlobo lwendandatho ukuze unamathisele kusikulufu. Kulolu hlobo lwesicelo, ngithanda ukuthengisa ama-adaptha e-kink entanjeni. Lokhu kuqinisekisa isixhumanisi esihle futhi kuvikela kakhulu ukugqwala lapho kusetshenziswa ngaphandle. Ngaphezu kwalokho, ngisebenzisa amantongomane amabili kusikulufa ngasinye esiwagwema ukuthi angaxegi ngesikhathi sokusetshenziswa. Isaziso samabhulabhu amhlophe aqondile kumakhoyili. Ngisebenzise iglue encibilikayo ukuze ngivimbe amakhoyili ukuthi angahambi ngemva kokushuna. Akunjalo impela, nokho kuyasebenza.

  

Ukuze ushintshe amabhendi, ngivele ngihambise isiqeshana sengwenya. Njengoba kuveziwe, awekho amakhoyili afinyezwayo. Lena eyebhendi yamamitha angu-40. Ngebhendi yamamitha angu-30, mane ususe isiqeshana sengwenya phansi kusikulufu phakathi kwamakhoyili womabili. Ngamamitha angu-20, hambisa isikulufu sengwenya sokunamathisela phansi, esifinyeza yonke ikhoyili.

  

Njengoba ngishilo ekuqaleni, ngisebenzisa induku yokudoba egoqekayo engamamitha angama-20 ukuze ngisize insika yothi oluqondile olufushanisiwe. Bengifisa ukuthi ikwazi ukuzondla, ngakho idinga uhlobo oluthile lwecebo lokudlala. Ngihlangane nesiteshi se-youtube sika-K6ARK. Ikakhulukazi ividiyo yakhe ebhalwe ukuthi SOTA/Wire Portable Telescopic Post Setup. iyisevisi ekahle. Ngenze izinguquko ezimbalwa ezincane kakhulu, kodwa umqondo uyafana. Isithombe esibalwe ngezansi sihlela umphumela wokugcina.

      

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Ukuze uthole incazelo enhle buka isiqeshana sevidiyo sika-K6ARK:

            

           

Ingcina ye-epoxy okungenzeka ukuthi wayisebenzisa kwakuyi-JB Weld endala. Yilokho engikusebenzisile, futhi kusebenza kumnandi. Elinye iphuzu engilenzile elihlukile ukuthi angizange ngisebenzise "Umfanekiso 9". Kungenzeka futhi ngiyonga ukuzithenga. Ngokuqondile ngithanda ukusebenzisa ihitch endala ye-taut-line emigqeni yami ngayinye. Ifindo elilula ngempela ukulifunda. Nasi isixhumanisi sewebhu sevidyo kliphu ye-youtube sendlela yokubopha i-Taut-line Hitch. Ukucabanga kwami ​​yilokhu, uma ngibheka ukuthi ngiyabona ukuthi ngibopha kanjani i-taut-line drawback, ngingasebenzisa noma yiluphi uhlobo lwentambo ngomugqa ngamunye. Ngakho-ke uma ngilahlekelwa ulayini wami oyedwa, ngingavele ngibambe enye into ye-paracord futhi ngihlale ebhizinisini.

   

Lapha kukhona ukuvala kwe-taut-line hitch:

             

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Into eyodwa engiyenzayo ukuthi ngokushesha nje lapho ngibophe umugqa we-taut-line okokuqala, angikuqondi. Ngimane ngikhiphe ama-carabiner esigxotsheni futhi ngigcine ngomugqa wendoda ne-taut-line hitch iphelele. Ngale ndlela ngokuzayo uma ngisebenzisa amamitha angu-40 afushanisiwe aqondile, imigqa yabafana isilungele ukuhamba. Yilokhu okwenziwa yi-K6ARK nge-Figure-9s ayisebenzisayo.

  

Lapho ngisungula amamitha ami angu-40 30 20 afushanisiwe aqondile, empeleni ngithole ukuthi kungcono kakhulu ukusebenzisa induku yokudoba endaweni yekhoyili. Lokhu kunciphisa ukuguquguquka kanye nengcindezi esigxotsheni sokudoba. Okunye engikwenzileyo ukuthi ngihlukanise ingxenye eyodwa yekhoyili ngokuthi "phezulu". Lona umphumela wokubeka kwami ​​ikhoyili yokupakisha ibheke phansi izikhathi ezimbalwa lapho ngiyisungula. 

         

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Ekupheleni kwenduku yokudoba, nginebhokisi lepulasitiki eline-ZENZE WENA 1:1 ibhaluni njengoba itholiwe esithombeni esibalwe ngezansi. Izintambo eziphuzi zingama-radial ami angu-2 anamathisela emaceleni ephakheji. Lokhu kusetha kukwenza kusheshe futhi kube lula kakhulu ukukhulula ama-radial. Ngaphezu kwalokho nginamabhendi e-velcro aphuma kuzikulufu ohlangothini lwebhokisi lepulasitiki. Lokhu kugoqa isisekelo senduku yokudoba. 

         

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Njengoba kushiwo ngaphambili, ngaphakathi kwebhokisi lepulasitiki kune-balun engu-1: 1. Nakhu okungaphakathi kwebhokisi lepulasitiki: 

          

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I-balun isebenzisa i-RG-174 coax futhi inamajika angu-9 ku-Kind 43 ferrite core ene-OD engu-0.825 amayintshi. 

  

Njengoba kuxoxiwe ngaphambili, bekunzima ukuphatha ama-radial angama-40 wamamitha angu-1/4 ekusethweni kwehlathi. Uma ngibheka inetha, ngithole ukuthi ama-radial angama-wavelength angu-1/8 we-antenna eqondile yinto engenzeka. Nazi izinkomba ezimbalwa engizithole ngabantu abahlakaniphe kakhulu kunami ngale ndaba: 

  

I-Radial System Design kanye nokusebenza kahle kwe-HF Radials - N6LF

  

Amasistimu we-antenna eqondile, ukulahlekelwa, nokusebenza kahle - i-N1FD

  

Ngakho-ke ngikholelwa ukuthi ngizonikeza ama-radial angu-1/8 we-wavelength shot. Kunokuba ngibe nama-radial angama-33-foot, ngokuqinisekile ngizoba nama-radial angama-16.5-foot. Ukwengeza, bengithumela nje okungenzeka ngisebenzise ama-radial amabili. Ngiyabona ukuthi lokhu kungaphansi kokulungile. Kodwa ngakubona kunzima kakhulu ukubona ukuthi lokhu kuzosebenza ngempela yini.

  

Inkinga eyodwa enkulu ngothi lwekhebula lapho luphatheka, indawo yokugcina nokuthi ungayisebenzisa kanjani ngokushesha/ kalula. Ngemva kokuzama izindlela ezimbalwa ezihlukene kanye nokusesha okumbalwa kwewebhu, ngathola indawo ye-W3ATB lapho echaza khona ukusebenzisa i-reel ye-woodworker's chalk. Nokho hhayi nje noma iyiphi i-reel kashoki, kodwa i-Irwin Devices Speedlite chalk reel enengxenye yegiya engu-3:1. Ngeke ngichaze ngezansi, njengoba enza umsebenzi oyingqayizivele ecacisa ukudabula nokushintshwa kwale gizmo ukuze isetshenziswe njengendawo yokugcina izintambo kanye nokusetshenziswa ngokushesha kwezimpondo.

   

Lapha kukhona isithombe se-Irwin Speedlite 3:1 chalk reel yami. Ibamba izintambo ezingu-16.5 zocingo kwenye yama-radial ami kahle.

       

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Ukuze uthole indawo yokugcina yesici esiqondile samamitha wami angama-40/30/20 mpo. Ngisebenzise isiqephu sokhuni esingama-intshi angu-7 ubude futhi ngasika inothi ekugcineni ngakunye. Bese ngimboza ikhebula ngobude. Isithombe esibalwe ngezansi sihlela lokho ebengikucabanga. Bengikhathazekile ngokuthi ikhoyili yokupakisha izogingqika futhi ilimale ngesikhathi iyifaka ephaketheni.

   

Ukwengeza, bona ikhebula eliphuzi. Uma kubhekwa ukuthi induku yokudoba egoqekayo engiyisebenzise ingamafidi angu-20 ubude, kanye nobude begagasi obungu-1/4 kumamitha angu-20 bungamafidi angu-16.5, intambo ephuzi, engamafidi angu-3 1/2 ubude, ixhunywe phezulu kokudoba. induku nentambo ebomvu ixhunywe kuyo. Lokhu kubeka i-balun yami phansi lapho induku yokudoba inwetshwa ngokuphelele.

          

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Ngakho-ke ngithumele cishe endaweni yase-Walmart ngifuna into enesitsha sepulasitiki esiyindilinga esingafanela lokhu-- futhi engikutholile-- eduze kwesilinda sezisuli zezingane! Ekhaya, nganginezinto zokupakisha kwezinye izinto zikagesi engangizitholile okuwuhlobo oluthile lwegwebu leseli elivaliwe. Ngisebenzise lokho ukuze ngiklelise ingaphakathi lesilinda Ngezansi isithombe sesici esime mpo esipakishwe esitsheni saso sokugcina.

           

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Nasi esinye isithombe sothi olusebhodweni esilungiselelwe ukubeka isivalo.

         

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Ukushuna uthi kungase kube nzima kodwa kungenziwa. Ukuba ne-NanoVNA antenna analyzer kusiza kakhulu. Iphuzu lokuqala okufanele ukwenze ukubona ukuthi womabili ama-radial ancishisiwe abe ngamafidi ayi-16 1/2 ubude. Okulandelayo kuqala ngamamitha angama-20 ngokufinyeza ngokuphelele ikhoyili yokugcwalisa. Ngokuvamile i-quarter-wave eqondile ngamamitha angu-20 izungeze amafidi angu-16 1/2. Ngaqala ngamamitha angu-17 ngibona ukuthi lokhu kude kakhulu. Kulula ukufinyeza uthingo olude kakhulu kunokwengeza ubude. Ngokubheka ukuthi induku yokudoba esetshenziselwa ukusekela uthi ingamafidi angu-20 ubude, ngengeze amafidi angu-3 1/2 omugqa woshoki osele phezulu kwentambo eqondile. Ngale ndlela lapho ubude bamamitha angu-20 busesilinganisweni sawo sokugcina, ngingakwazi ukulungisa usayizi ophelele we-antenna ukuze ngiqiniseke ukuthi i-balun ihlezi phansi.

   

Okulandelayo shuna uthi lwamamitha angu-30. Qala ngokubeka isiqeshana esifushane kusikulufu esiphakathi kwamakhoyili amabili. Hlola ukudlidliza. uma iphansi kakhulu, phuma ejikeni futhi uphinde uhlole. Uma iphansi kancane, ivele ihluke ngoku-1 noma oku-2 kwengxenye engafinyeziwe yekhoyili. Ukwenza kanjalo kunciphisa inductance yekhoyili ngaphansi kokususa ukujika.

     

Uma unelisekile ngamamitha angu-30, buya futhi uhlole amamitha angu-20. Lapho yonke into encane isiyinhle ngamamitha angama-30 ngathatha ingcina encibilikayo eshisayo futhi ngayisebenzisa ngokuhambisana nemiyalelo yamakhoyili ukuwagcina esendaweni.

   

Okokugcina amamitha angu-40, hambisa isiqeshana esifushane usifake kusikulufu esiphezulu, esisebenzisa yonke ikhoyili yokupakisha. Phinda inqubo yokulungisa njengangaphambilini. Uma usuqedile, sebenzisa ingcina ye-hot-melt kumamitha angu-40 athembele kuwo ukuwavikela endaweni.

   

Isikhathi sokuqala lapho ngisebenzisa le antenna kwaba yilapho ngicupha i-Clearfork Canyon Nature Preserve, K-9398 ngisebenzisa ama-transceivers wami we-QCX-mini. Ngezansi kunesithombe sothi olume mpo olusungulwe emhosheni ngesikhathi lusebenza.

    

Uhlobo lwayo olunzima ukubona uthi. Ngisebenzisa iparacord ephuzi kolayini bendoda esiza ukubona ukuthi iphi uthi.

       

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Imiphumela? Ngijabulile ngaleli uthi. Ngaphandle kwemvume yayo, isebenza kahle-- ngisho nokusebenzisa i-QRP. Ekusebenzeni kwami ​​kokuqala ngayo, ngenze ama-QSO angu-15 kumamitha angu-40 nama-20. Ngokuvamile ngithola imibiko engu-569 ngenkathi ngisebenzisa ama-watts angu-5.

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