Pano pali mapulani omanga ndi kumanga antenna ya Turnstile yomwe ndimagwiritsa ntchito polumikizana ndi mlengalenga pagulu la wailesi la 2 metre amateur.

Mlongoti Wotembenuka wokhala ndi chonyezimira pansi pake umapanga mlongoti wabwino wolumikizana ndi dera chifukwa umapanga mawonekedwe ozungulira komanso okhala ndi mawonekedwe otakata, okwera. Chifukwa cha mawonekedwe awa, palibe kufunika kozungulira mlongoti.

Zolinga zanga zopanga zinali zotsika mtengo (ndithudi!) Ndipo zopangidwa kuchokera kuzinthu zoperekedwa mosavuta. Poyang'ana masitayelo ena a mlongoti wa pachipata, chinthu chimodzi chomwe chimandivutitsa nthawi zonse ndikuti amagwiritsa ntchito coax (msewu wopanda malire) komanso kudyetsa mlongoti (katundu wokwanira bwino). Malinga ndi mabuku a mlongoti, izi nthawi zambiri zimakonda kupangitsa kuti coax iwoneke, ndikukwiyitsa ma radiation onse a antenna.

The Antenna

Zomwe ndidasankha kuchita ndikugwiritsira ntchito "dipoles zopindika" osati zanthawi zonse. Pambuyo pake dyetsani mlongoti wachipata ndi 1/2 wavelength 4:1 coaxial balun. Mtundu uwu wa balun umayang'aniranso vuto la "kusalinganika-kusiyana" lomwe limakumananso.

Chithunzi chomwe chili pansipa chikuwonetsa momwe mungapangire mlongoti wa pachipata. Chonde dziwani, izi siziyenera kusiyanasiyana.

Kupanga kwa mlongoti wowunikira pachipata kumakhala ndi ma dipoles 2 1/2 owongoka omwe amalunjika madigiri 90 kuchokera wina ndi mnzake (monga X yayikulu). Kenako kudyetsa dipole 90 madigiri kuchokera gawo la 2. Vuto limodzi ndi antennas a Turnstile Reflector ndikuti chimango chogwirizira gawo lowonetsera lingakhale lovuta.

Mwamwayi (ena angatsutse) Ndinasankha kupanga mlongoti wanga wotembenuka m'chipinda changa chapamwamba. Izi zithana ndi vuto lina chifukwa sindiyenera kudzidetsa nkhawa ndikusintha kwa antenna.

Pa ma dipoles opindidwa ndimagwiritsa ntchito 300 ohm TV twinlead. Chimene ndinali nacho chinali kuchepetsedwa kutayika kwa mtundu wa "thovu". Kutsogola kowirikiza kumeneku kumakhala ndi gawo la 0.78.

Mudzawonanso pachithunzi pamwambapa kuti kukula kwa dipole sizomwe mungayembekezere pamamita awiri. Uwu ndiye kutalika komwe ndidamaliza nditamaliza kukonzanso SWR yochepa. Mwachiwonekere chiwerengero cha chiwerengero cha manambala a twinlead mu resonance ya dipole yopindidwa. Monga akunena, "Mileage yanu ikhoza kusiyana" kutalika kwake. Ndikufunanso kunena kuti m'fanizo la gawo la dipoles lopindidwa lili pakatikati pa dipole lopindidwa. Ndinapanga chojambula motere kuti chimveke bwino.

The Reflector

Kuti tipeze mawonekedwe a radiation mu malangizo opita m'mwamba a kulumikizana kwa mlengalenga mlongoti wotembenuka umafunika chowunikira pansi pake. Pazithunzi zazikuluzikulu mabuku a tinyanga amalimbikitsa kutalika kwa 3/8 (mainchesi 30) pakati pa chowunikira ndi chipata. Chida chomwe ndidasankha chowonetsera ndi chiwonetsero chazenera chakunyumba chomwe mungatenge ku shopu ya hardware.

Onetsetsani kuti ndi chophimba chachitsulo chifukwa pali zenera lopanda chitsulo lomwe amaperekanso. Ndidagula zokwanira kuti ndifotokoze masikweya 8 pamiyala ya chapamwamba changa. Sitolo ya hardware sinathe kundipatsa chinthu chimodzi chachikulu pa chilichonse mwa izi, kotero ndidaphatikizira zinthu zowonetsera pafupifupi phazi limodzi pamgwirizano. Kuchokera pakati pa chowunikira, ndinayeza mainchesi 30 (3/8 wavelength). Apa ndipamene pakati, kapena kudutsa gawo la dipoles lopindika lagona.

The Phasing Harness

Izi sizinapangidwe zovuta konse. Palibenso china chilichonse kuti chidutswa cha 300 ohm twinlead chomwe chili ndi kutalika kwa 1/4 wavelength. M'mikhalidwe yanga, ndikusintha kwa 0.78 kutalika ndi mainchesi 15.75.

The Feedline

Ndinapanga 4:1 coaxial balun kuti ifanane ndi mzere wa chakudya ndi mlongoti Pazojambula zomwe zalembedwa pansipa pali zambiri zamamangidwe.

Gwiritsani ntchito njira yabwino kwambiri, yotsika mtengo ngati muli ndi njira yayitali yoyendetsera njira yanu. Kwa ine, ndimangofuna mapazi 15 a coax kotero ndimagwiritsa ntchito RG-8 / U coax. Izi sizimaperekedwa nthawi zambiri, komabe ndi mzere wofotokozera mwachidule uwu pali kutayika kochepera 1 db. Miyezo ya loophole imatengera kuthamanga kwa coax yomwe imagwiritsidwa ntchito. Lumikizani coaxial balun kumalo odyetserako mlongoti wotembenukira, monga momwe tawonera pachithunzi pamwambapa.

Zotsatira

Ndine wokondwa kwambiri ndi mphamvu ya mlongoti uwu. Chifukwa sindinafune ndalama zowonjezera za rotor ya AZ/EL, ndidaona kuti ndine woyenerera kugula Mirage preamplifier. Ngakhale popanda preamplifier, ndege ya MIR, komanso ISS ndizokhazikika mwazolandila zikayenera kuchita ndi 20 deg. kapena wamkulu kumwamba. Mwa kuphatikiza preamplifier, iwo ali lonse pa S-mita pafupifupi 5-10 deg. pamwamba pamalingaliro.