ozi

Dị ka ihe omume ntụrụndụ, ogologo oge a na-agba redio onye na-amu amu ume ịnwale ihe ọ bụla ị nwere n'aka. Mgbe [Tom Essenpreis] chọrọ iji eriri 14 MHz ya na-abụghị nke oge nhazi ya, ọ maara na ọ chọrọ sekit dakọtara impedance. Ụdị a na-ahụkarị bụ sekit L-Match, nke na-eji capacitors na-agbanwe agbanwe na inductors na-agbanwe agbanwe iji dozie ọnụọgụ ugboro (resonance) nke antenna. Ọ bụ ezie na ọ naghị arụ ọrụ nke ọma na nhazi ụfọdụ akọwapụtara, ha dị mma n'ịchịkọta ọdịiche dị n'etiti 50 ohm impedance nke redio na mgbochi amaghi ama nke antenna.
Obi abụọ adịghị ya, [Tom] nọ na-achọ akụkụ n'ime ihe mkpofu ya, na-eji mkpanaka ferrite, gluu ọkụ, waya magnet, teepu ọla kọpa na ụfọdụ sirinji 60 ml sitere na redio AM iji chịkọta ndị na-agbanwe agbanwe capacitors na inductors. Ọnụ. Ị nwere ike ịhụ ka ọ na-egweri n'etiti plunger ka ọ nwee ohere maka mkpanaka ferrite. Kechie n'èzí nke sirinji na waya electromagnetic, nhazi nke ferrite nwere ike gbanwee site na plunger, na njirimara nke ihe ndị ahụ nwere ike gbanwee iji dozie sekit. [Tom] kọrọ na ya nwere ike iji tuner ọhụrụ ya mere maka nkwanye ndụ, anyị ji n'aka na ọ na-amasị ya iji akụrụngwa ya emezigharịrị.
Ọ bụrụ na ị naghị amasị redio onye na-amu amu, mgbe ahụ enwere ike anyị nwere ike dọta gị site na rọketi sirinji, sirinji 3D ebipụtara dragọn, ma ọ bụ igwe na-adọkpụ sirinji na-ebugharị. Ị nwere hacker nke gị ị ga-ekekọrịta? N'ọnọdụ ọ bụla, nyefee ya n'ahịrị ozugbo!
Abụghị m HAM na amaghị m ọtụtụ ihe gbasara HF, mana amaara m na na ụfọdụ band band, ike TX nwere ike ibu ibu, ya mere voltaji na antenna ga-abụ nnukwu. Ọ nwere ike ịbụ ihe dị mma ịwụnye tube plastik na-adịghị arụ ọrụ nke jupụtara na ikuku n'etiti antenna tuner na ngwaọrụ njikwa?
O kwuru okwu ụfọdụ gbasara adịghị arụ ọrụ nke na-abụghị nsogbu. A na m echeta n'akwụkwọ nke Doug Demaw dere na ọ na-ekwu na ferrite na-emecha na-akpa àgwà ka ikuku na elu ugboro.
Eji m mkpanaka ferrite dị otú ahụ na 80m fox transmitter (3.5MHz). E jiri ya tụnyere ngwakọta ferrite nke ugboro ole kwesịrị ekwesị, ọnwụ ahụ dị na nso 5 dB.
Gịnị bụ waya electromagnetic a dị omimi nke America nke m na-ahụ na ịntanetị, oleekwa ihe jikọrọ ya na ndọta? Ọ bụ ígwè ka e ji mee ya?
Waya magnetik bụ waya ọla kọpa nwere akwa mkpuchi enamel dị mkpa. Echere m na a na-akpọ ya otu a n'ihi na a na-ejikarị emepụta igwe eletrik eletrik, ya bụ, maka moto windings/speaker voice coils/solenoids/winding inductor/etc.
Ma ọ bụ, ọ bụrụ na ịnweghị sirinji, ụfọdụ corflute/coroplast nwere ike iji dị ka eriri mbụ na ferrite na-abanye na ya. Maka nkọwa, biko hụ: https://www.youtube.com/watch?v=NyKu0qKVA1I
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