nkhani

Monga chosangalalira, wailesi yachinyamata yakhala ikulimbikitsidwa kuyesa chilichonse chomwe mungakhale nacho. Pamene [Tom Essenpreis] ankafuna kugwiritsa ntchito mlongoti wake wa 14 MHz kunja kwa kamangidwe kake kafupipafupi, adadziwa kuti akufunikira dera lofananira. Mtundu wodziwika kwambiri ndi L-Match circuit, yomwe imagwiritsa ntchito ma capacitor osinthika ndi ma inductors osinthika kuti asinthe ma frequency osiyanasiyana (resonance) ya mlongoti. Ngakhale ndizosakwanira pamasinthidwe ena, ndiabwino kutsekereza kusiyana pakati pa 50 ohm impedance ya wailesi ndi kulepheretsa kosadziwika kwa mlongoti.
Mosakayikira, [Tom] anali kufunafuna ziwiya mu chidebe chake, pogwiritsa ntchito ndodo za ferrite, guluu wotentha, waya wa maginito, tepi yamkuwa ndi ma syrinji owonjezera a 60 ml a wailesi ya AM kuti asonkhanitse ma capacitor ndi ma inductors. Pamodzi. Mutha kumuwona akupera pakati pa plunger kuti apange malo a ndodo ya ferrite. Manga kunja kwa syringe ndi waya wamagetsi, makonzedwe a ferrite amatha kusinthidwa ndi plunger, ndipo mawonekedwe a zigawozo angasinthidwe kuti asinthe dera. [Tom] adanenanso kuti adatha kugwiritsa ntchito chochunira chake chomwe adangopanga kumene, ndipo tikutsimikiza kuti amakonda kugwiritsa ntchito zida zake zomwe zidasinthidwa.
Ngati simukonda wailesi yachibwana, ndiye kuti titha kukukopani ndi roketi yokhala ndi syringe iyi, makina osindikizira a 3D oyendetsedwa ndi syringe, kapena chokoka choyendetsedwa ndi syringe. Kodi muli ndi hacker yanu yomwe mungagawane nayo? Mulimonsemo, perekani ku mzere wofulumira!
Sindine HAM ndipo sindikudziwa zambiri za HF, koma ndikudziwa kuti m'magulu ena afupipafupi, mphamvu ya TX ikhoza kukhala yaikulu, kotero kuti magetsi pa antenna adzakhala aakulu. Kodi chingakhale chinthu chabwino kukhazikitsa chubu chapulasitiki chosagwiritsa ntchito chodzaza ndi mpweya pakati pa chochunira mlongoti ndi chipangizo chowongolera?
Anatchulapo zina zokhudza kusagwira ntchito bwino, zomwe sizovuta. Ndikukumbukira m'buku la Doug Demaw kuti adanena kuti ma ferrite pamapeto pake amakhala ngati mpweya pamafunde apamwamba.
Ndidagwiritsa ntchito ndodo ya ferrite mu 80m nkhandwe transmitter (3.5MHz). Poyerekeza ndi kusakaniza kwa ferrite pafupipafupi koyenera, kutayika kuli mumtundu wa 5 dB.
Kodi waya wodabwitsa wamagetsi waku America uyu ndi chiyani, ndipo ndi chiyani ndi maginito? Kodi ndi chitsulo?
Waya wa maginito ndi waya wamkuwa wokhala ndi wosanjikiza wocheperako wotchingira enameled. Ndikuganiza kuti amatchulidwa motere chifukwa nthawi zambiri amagwiritsidwa ntchito popanga ma coil a electromagnetic, kutanthauza kuti, ma coils amawu a speaker/solenoids/ winding inductors/etc.
Kapena, ngati mulibe syringe, zinthu zina za corflute/coroplast zitha kugwiritsidwa ntchito ngati coil wakale ndipo ferrite imalowetsamo. Kuti mudziwe zambiri, chonde onani: https://www.youtube.com/watch?v=NyKu0qKVA1I
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