TV yamlengalenga: mwachidule

Pakali pano, pali imodzi kapena ma TV ambiri mnyumba iliyonse. Antenna amafunika kupanga bungwe la zizindikiro za televizioni. Pali mitundu yambiri yolandila. Zimagawidwa ndi cholinga, mtundu wa zizindikiro zovomerezeka, mawonekedwe, kukula ndi zina zotero. Nkhani ya zokambirana zathu zamasiku ano izikhala ngati kulandira ma TV.

Aliyense wa ife m'moyo wake mwanjira ina anakumana ndi zipangizo izi. Antenna ndizojambula zitsulo, nthawi zambiri aluminiyumu, zopangidwa kuti zikhale ndi chizindikiro cha wailesi. Malingana ndi mtundu wa televizioni omwe amalandiridwa, iwo amagawidwa mu mamita ndi zipangizo zamagetsi. Komanso amagawidwa pamalo opangidwira m'nyumba ndi kunja. Mwa njira yomwe chizindikirocho chikulandiridwa, antenna ya televizioni ingakhale yogwira ntchito kapena yosasamala.

Tiyeni tiganizire mitundu yayikulu yolandila zipangizo:

1. Dipole kapena vibulator. Iwo ndiwotayira-seveni, mawonekedwe a theka ndi mafunde. Kumapeto kwake, kutalika kwa vibrator kumagwirizana ndi wavelength ya chizindikiro chomwe chikulandiridwa; Mphindi ya hafu ya chizindikiro; Ndipo, molingana, kotala-wani-kotala. Pa dipole, kutsutsana ndi mawonekedwe a 300 Ohm, kuti agwirizane ndi antenna ndi TV ndi chingwe cholandirira pansi pa masewera a amateur, zofanana zomwe zimagwirizanitsa ndi mphindi imodzi zimagwiritsidwa ntchito nthawi zambiri. Kwa makina onse a TV, chingwe chotsitsa chimakhala ndi mpweya wa 75 ohms. Dipole, makamaka, ndi analog ya chipinda cha chipinda.

2. Ma TV atentenna mtundu "wave wave" angakhale: zigawo ziwiri, zitatu, zigawo zisanu, zisanu ndi ziwiri, chinthu khumi ndi chimodzi ndi chisanu ndi chimodzi. Wogwira ntchito sagwiritsidwa ntchito mosasamala, ndilo gawo lothandizira maina a mtundu uwu. "Mtsinje" wotchedwa antenna uli ndi chinthu chogwira ntchito (vibrator, kawirikawiri pachimake) ndi zinthu zopanda pake: wonyezimiritsa ndi oyang'anira amawoneka pafupipafupi. Wotsogolerayo ndi mthunzi wopita patsogolo womwe uli kutsogolo kwa wogwira ntchito. Wowonetserako ndi vibrator yomwe ili kumbuyo kwa yogwira ntchito. Maina a mtundu uwu, ali ndi drawback imodzi: pamene akuwonjezera zinthu zosavuta kumvetsera, mawonekedwe a antenna amachepetsedwa. Kulandira zipangizo zamtundu uwu ndizogwiritsidwa ntchito kwambiri mu zipangizo zamakanema ndi radiyo.

3. Pulogalamu yamakono yopanga ma TV ndi makina akuluakulu omwe amapereka mauthenga ambiri pafupipafupi (decimeter ndi mafunde a mamita). M'magulu ogwira ntchito, kuyerekezera kwakukulu kwa antenna ndi kudyetsa kumatheka, pamene phindu likukhalabe lokhazikika.

4. Kuyika ma televizioni opangidwa ndi TV kumapangidwira kulandira chizindikiro, nthawi zina pamene ma antenna sangathe kupereka chizindikiro chodziwika bwino. Zili ziwiri kapena zitatu. Zida zamtundu umenewu zimaphatikizapo kupindula kwakukulu ndi zosavuta kupanga, sizifuna kusintha.

5. Kudula mu gawo ndi njira yovuta kwambiri yomwe imakhala ndi ziwalo zochepa, zomwe zimagawanika mlengalenga, zimakonzedwa m'njira yoti zizindikirozo zikhale zofanana. Monga lamulo, iwo asonkhanitsidwa kuchokera kumabowo ofanana omwe anakonzedwa mu mizere ingapo ndipo amagwirizana ndi magetsi. Anthu ovomerezeka mwachizoloŵezi ndi ma antennas a TV ndi amplifiers.

Pomalizira, tiyeni tiwone kuti kusankha kwa antenna kuyenera kuyankhulidwa payekha, malingana ndi malo amderalo, kuchokera ku malo osungirako malo ndi zotsatira zoyenera.