I-ASTM 201 304 Abahlinzeki be-tubing ehlanganisiwe yensimbi engagqwali

Ukuthola i-oscilloscope kwakuyisiko lokudlula kubaduni behadiwe.Kuze kube kamuva nje, amathuluzi amasha abengavamile ukuba phakathi kwesabelomali somuntu ojwayelekile, ngakho-ke kungenzeka ukuthi ubambeke nge-oscilloscope endala.Kunezinketho eziningi ezingabizi kulezi zinsuku, ikakhulukazi uma uhlanganisa ama-oscilloscope ekhompyutha angabizi kanye “nama-oscilloscopes”.Amamitha edijithali nawo ashibhile kulezi zinsuku (avame ukuba mahhala kwezinye izitolo ezinkulu), njengamajeneretha esignali, izinto zokubala zamafrikhwensi, ngisho nezihlaziyi ezinengqondo.

I-ASTM 201 304 Abahlinzeki be-tubing ehlanganisiwe yensimbi engagqwali

Kodwa kunocezu olulodwa lwemishini yokuhlola engabonwa kaningi njengakuqala, futhi lokho kuyihlazo ngoba yingxenye yekhithi eguquguquka kakhulu.Kuyavunywa, uma ungasebenzi nge-wireless, cishe ngeke ibe ohlwini lwakho lwezifiso, kodwa uma wenza noma yini nge-RF, akulona nje ithuluzi eliguquguqukayo, kodwa futhi liyigugu kakhulu.kuthiwa kuncike ekuthenini.Ngokomlando zazibizwa nge-“Grid Dip Oscillator” noma i-GDO.Ngezinye izikhathi ungase uzwe kuthiwa “imitha yokutshekisa igridi”.Kodwa-ke, izinguqulo zesimanje azinawo amashubhu (ngakho-ke ama-grates), yingakho ngezinye izikhathi uzowezwa manje ebizwa ngokuthi ama-inclinometer, noma mhlawumbe amabhakede nje.
Kungakhathaliseki ukuthi uzibiza ngani, isimiso sokusebenza siyafana, futhi silula kakhulu.Ithuluzi aliyona into engaphezu kwe-oscillator ye-broadband ephumayo exhunywe kumjikelezo wangaphandle.Kukhona nezindlela zokulawula ukuthi mangakanani amandla asetshenziswa ijeneretha.Lokhu ngokuvamile kwenziwa ngokubheka i-amplitude ephakeme ye-oscillator.
Isizathu sokwehla sihlobene nendlela i-inductor ne-capacitor eziphatha ngayo kumafrikhwensi ahlukene.Kunemithombo emithathu ye-impedance cishe kunoma iyiphi isekethe noma ingxenye: ukumelana, okungafanele kushintshe ngokuvama, ukusabela kwe-capacitive, ngenxa yendlela yomthamo, kanye nokusabela kwe-inductive kwezingxenye ze-inductive.Kwezinye izimo, unenqwaba yazo.Isibonelo, izitha zekhabhoni akufanele zibe nokusabela okuningi kwanoma yiluphi uhlobo.Ama-Capacitor kufanele abe namandla kakhulu.
Ku-capacitor enikeziwe, ukusabela kukhulu kakhulu kumafrikhwensi aphansi futhi kuncane kakhulu kumafrikhwensi aphezulu.I-inductance yenza okuphambene: amafrikhwensi aphansi akhiqiza ukusabela okuncane kunamafrikhwensi aphezulu.Lokhu kulula ukukukhumbula uma ucabanga ngokwamanje okuqondile njengegagasi elinoziro hertz.I-inductor (coil) ngokusobala izophatha i-DC (ukusabela okuphansi), kuyilapho i-capacitor (amapuleti amabili ahambisanayo) ngokusobala ngeke iphathe i-DC (ukusabela okuphezulu).
Nakuba ukumelana okuphelele kwesekethe kuncike kulezi zakhi ezintathu, akulula njengokwengeza amanani.Lokhu kungenxa yokuthi ukumelana nokusabela akulona inani elifanayo.Uma unesignali engu-1V engena kumthwalo ongu-2 ohm nokusabela okungu-3 ohm, ufuna ukwazi ukuthi iziphatha ngendlela efanayo nokuthi i-1V ingena kusiphikisa esivamile.Uma ukumelana nokusabela kuxhunywe ochungechungeni, inani lalokhu kumelana okusebenzayo lilingana ne-impedance, okuyisamba se-vector sokumelana nokusabela.
Ngakho kulesi sibonelo 22+32=13.Umsuka oyisikwele ka-13 ungu-3.6 ncamashi, ngakho-ke i-impedance ingu-3.6 ohms.Ukuze kuqhutshekwe kwenze izinto zibe nzima, i-inductive ne-capacitive reactance ivame ukukhansela.Ukusabela kwe-capacitive ngokuvamile kuthathwa njengokunegethivu, noma njengoba sikuhlanganisa, akunandaba ukuthi hlobo luni lokumelana okunegethivu olucabangelayo kulesi sibalo esithile.Kulabo abathambekele kwizibalo, ucabanga ngempela ukumelana njengengxenye yangempela kanye nokusabela njengengxenye ecatshangelwayo yenombolo eyinkimbinkimbi.Ukuguqulela kwifomu le-polar kunikeza ubukhulu kanye ne-engeli yesigaba.
Uxhumano oluhambisanayo lucishe lufane, kodwa ukusabela kuyanda ngendlela efanayo nama-resistors afanayo.Kodwa iqiniso liwukuthi kumafrikhwensi athile, ukusabela kwe-inductive kanye ne-capacitive kuyalingana.Kumjikelezo wochungechunge, lokhu kusho ukuthi ukusabela kuba nguziro futhi kusele ukumelana kuphela.Kumjikelezo ohambisanayo, uziro ugcina esekudidiyeleni lwengxenyana, ngakho-ke ukusabela okusebenzayo akunamkhawulo (futhi uma i-resistor ehlanzekile ixhunywe ngokuhambisanayo, ayishintshi inani le-resistor).Kunoma ikuphi, ukusabela kuyakhansela, kushiye ukumelana okumsulwa.
Iphuzu lapho ukusabela kukhansela khona kuthiwa yi-resonance.I-inclinometer isebenza ngoba endaweni ye-resonance, i-oscillator yemitha izobona umthwalo omkhulu (i-impedance ephansi kakhulu), ngakho-ke i-voltage izokwehla (noma yehle).Kunoma ikuphi okunye ukuvama, ukusabela okuthile kuzohlala futhi ingqikithi yokungathinteki kwesekethe esivivinywayo izoba phezulu kune-resonance.
Ngokusobala, umsebenzi oyinhloko we-inclinometer ukukala imvamisa ye-resonant yesekethe.Uma kuyilokho kuphela okudingekayo, kuyasiza kakhulu.Kodwa ngomzamo omncane owengeziwe, i-inclinometer ingenza okuningi kakhulu.
Okokuqala, ingaphinda ilinganise amanye amasekhethi ashuniwe, hhayi nje ama-capacitor wengxenye nama-inductors.Isibonelo, ama-antenna, amakristalu, nemigqa yokudlulisela kungase kube nephoyinti elithile lokukhala, futhi imitha lingazikala.Kumakristalu, imvamisa imvamisa ye-oscillation yekristalu (enephutha elithile ngokuya ngomthamo womthwalo nezinye izici).Ama-antenna angancenceza kumaza amaningi, hhayi nje leyo oyithandayo, ngakho-ke kudingeka ukwahlulela okuthile.Noma yini engenayo ikhoyili (efana nothi noma ikristalu) idinga ikhoyili encane ukuze idlulise amandla isuka kumitha iye kuyisekethe.
Ngezintambo zamandla, ungakwazi ukukala lokhu ngokwenza iluphu encane ukuze uxhume i-inclinometer (encane ibe ngcono).Thola idiphu ephansi kakhulu futhi izobonisa ubude begagasi obungu-1/4 befrikhwensi yomugqa wokudlulisela.Isibonelo, uma ikhebuli ikhala ku-7.5 MHz (amamitha angu-40 ubude be-waveleng), ikhebuli ingamamitha angu-10 ubude.Nokho, ungakhohlwa ukucabangela isivinini isici somugqa wokudlulisela.Okusho ukuthi, ulayini wokudlulisa wekota-wave onesilinganiso sesilinganiso esingu-0.66 uzoba mfushane kunobude bethiyori (kulokhu, ungama-66% kuphela wobude bethiyori).
Kunjalo, ungasebenzisa izilinganiso zolayini wokudlulisela ngendlela othanda ngayo.Okusho ukuthi, ungathola imvamisa ye-resonant ukukala ikhebula, noma ungasetha imvamisa futhi ulungise umugqa womthambeka.Eqinisweni, ukusebenzisa lokho okwaziyo ukuze uthole lokho ongakwazi ngokuvamile kuyisimiso esihle sama-inclinometer egridi.Ufuna ukukala i-capacitor engaziwa?Kwenze kuzwakale nge-inductor eyaziwayo.Noma qala nge-capacitor eyaziwayo futhi uthole inani lekhoyili engaziwa.
Kodwa-ke, enye yezinkinga eziyinhloko ukufunda imvamisa enembe ngokunengqondo.Ezinye izinzwa zesimanje zinezibonisi zedijithali (njenge-DipIt eboniswa kwesokudla).Kodwa-ke, ama-gauge okucindezela ajwayelekile kakhulu awakwenzi.Ngakolunye uhlangothi, ungawaxhuma kalula kumitha yefrikhwensi noma usebenzise isamukeli ukuze unqume ngokunembile imvamisa.
Izilinganiso ezengeziwe ziyatholakala uma unganaki ukulinganisa okuthile.Amakhoyili ane-Q (Q factor) ekhombisa ukuthi anokumelana okungakanani maqondana nokusabela kwawo.Sebenzisa i-reference capacitor enhle, yakha i-resonant circuit futhi ujikeleze imitha.Naka ukuvama.Bese wehlisa i-inclinometer uze ubone ukuthi ukufundwa kwayo kaningi kangakanani cishe ngo-30% ngaphezu kwalapho kutshekiswa khona.Manje phakamisa inzwa yokutsheka bese wehla ngomthambeka futhi uze uthole umaki ongu-30% futhi ngakolunye uhlangothi.U-Q ucishe alingane nefrikhwensi ephansi ehlukaniswe umehluko phakathi kwamafrikhwensi amabili angama-30%.
Lokhu kungase kube sobala, kodwa i-Ursa Major ingasetshenziswa kalula njengomthombo wesignali.Isibonelo, ukulungisa umsakazo, kufanele usethe i-inclinometer kufrikhwensi ofuna ukuthi umsakazo uyizwe bese uyilandelela ngesekhethi.Ama-inclinometer amaningi anemodi lapho evala khona i-oscillator futhi asebenzise ikhoyili (kanye ne-tuning capacitor) kanye ne-diode njengemitha yobude beza.Imitha ibe isiveza izinga lamandla e-RF kumafrikhwensi ashuniwe.Ezinye izinzwa zize zibe nama-headphone jacks ukuze ukwazi ukulalela isignali (okuyenza icishe ibe njengomsakazo wekristalu).
Esinye sezizathu ezenza abantu abaningi bangabi nawo ama-inclinometer namuhla ukuthi awatholakali kalula njengakuqala.I-Heathkit ingumphakeli odume kakhulu wama-inclinometer amamodeli ahlukahlukene.Amanye amamodeli wakudala adumile (avame ukubonakala ku-eBay) yi-Eico, i-Millen, i-Boonton, ne-Measurements Corporation (qaphela, uma ungeyena umqoqi, amamodeli wamashubhu angase angabi nenzuzo kakhulu).Ungathola uhlu lwezithombe eziningi ze-GDO kusayithi le-[n4xy] (izithombe zikude ngokuchofoza inkinobho elandelayo ekhasini eliyinhloko).Kwesokunxele isithombe se-GDO Measurements yami endala (futhi yebo, sisebenzisa amashubhu).
Usengathola ama-inclinometer amasha kwa-MFJ (bathengisa i-MFJ-201 ekhonjiswe kwesokudla futhi ungakwazi nokuguqula ezinye zezihlaziyo zezinti zabo zibe ama-inclinometer asebenzisekayo).Kukhona nezinhlelo eziningi ku-inthanethi.Uma ufuna i-tube mod yangempela (akunconyiwe), [w4cwg] inezinhlelo.I-[SMOVPO] yethula idizayini yesimanjemanje ye-FET nge-jumper entsha ukusiza ukwenza ukwehla kujule.
Ngakolunye uhlangothi, kubonakala kuyihlazo ukwakha iyunithi entsha ngaphandle kwesibonisi sedijithali.Kunjalo, ungakwazi ukwengeza eyodwa, noma usebenzise eyakhelwe ngaphakathi efana ne-DipIt noma i-ELM.Kukhona ezinye izinto eziningi ngisho nekhithi.Qalaza.Ingxenye enzima kakhulu imvamisa ukusonga amakhoyili, nakuba amanye azodinga ama-capacitor aguquguqukayo okunzima ukuwathola.Kodwa-ke, ekusebenzeni, noma iyiphi i-oscillator engakwazi ukuzinza izokwenza.Eqinisweni, nginamabhakede amabili amadala e-Heathkit abesebenzisa ama-diode emhubhe ophikisayo njengama-oscillator (elinye lawo lisesithombeni kwesokunxele).
Uma udinga umboniso wevidiyo wokusebenzisa i-inclinometer, angikwazanga ukwenza kangcono kuno-[w2aew], ukuze uthole ividiyo yakhe ngezansi.
Enye yazo ibisohlwini lwami “lwezifiso” kusukela ngathola ilayisensi yami yomsakazo oyimfundamakhwela ngo-2008. Okwamanje angikakayitholi inani engingakwazi ukuyikhokhela.Futhi, ngifisa ukwazi ukuthi yiziphi izitolo ezinikezela ngezinto zokubala zedijithali?Ngingasebenzisa ama-DVOM ashibhile kakhulu ukuze ngibonise amandla kagesi amakhulu (angisoze ngathembela imitha eshibhile nganoma yini enye).
I-Harbour Freight ivame ukukhiqiza izinzwa ezimbi kakhulu.Ngezinye izikhathi ngiyawathatha ngiwabeke etafuleni, ngoba cishe kanye ngesonto kufika othile abuze, “Ingabe unayo i-ohmmeter?”Ngimane ngibanike eyodwa angilindele ukuthi izobuya.Inkinga nje ukuthi anginayo i-buzzer.Lokhu kuwumbhedo ophelele, kodwa ukusatshalaliswa ...
Ngiyabonga, ngizobheka.Nginamamitha ambalwa e-Fluke ngisho ne-HP 3457A endala engithembele kuyo ukuze ngithole izilinganiso ezifanele, kodwa kungaba usizo ukuba namamitha ambalwa ashibhile njengabaqaphi bamandla kagesi aphansi kumaphrojekthi ami ahlukahlukene wokuphakela amandla.
Ngithole ukuthi omagazini bezimoto njenge-Hot Rod, Car Craft, njll. bavame ukukhangisa nge-Horror Fright eduze kwekhava engemuva.Izibali zabo ezishibhile ngokuvamile ziza nesigqebhezana “samahhala” ($10 ongasithenga).Ngiyawathanda, nginawo cishe ayishumi nambili, owodwa ngomshini ngamunye, owodwa owedeski lami, omunye owebhentshi lami lokusebenzela kanye nezinye ezingaba ngu-5 esitokweni.Iminyaka engu-5 noma ngaphezulu “ngiyiqoqile”, uma ngibona izinkinga, bekukuleli hlobo kuphela.Ukwenza okuthile (angikhumbuli ukuthi) ukufunda (kungaba i-DC voltage noma ukumelana) kuzonyamalala ngemva kwesekhondi noma ngaphezulu.“Akunalutho” kusho ukuthi ukufundwa kusethwe kabusha futhi kuya ku-0.00 noma ku-OL.Ngizamile ukushintsha ibhethri ngelinye ibhethri elingu-9V ebengilele kulo, kodwa langinika isexwayiso se-Lo Batt.Lapho ngifaka ibhethri lami, lisebenze kahle.I-Horror Fright iphinde ithengise enye i-DVM cishe ngama-dollar angu-25 (ngithenge eyami nge-$20).Ngiyiphatha kubhaka wami, kodwa i-LCD eguquguqukayo kwesinye isikhathi ayisebenzi endaweni evundlile.Ngiphinde ngine-4 Flukes.
Ngaphandle kwesihloko, lokhu akukona mayelana nama-multimeters nhlobo, i-OL isho ukulayisha ngokweqile, okujwayelekile kuma-resistors, okungabonwa nhlobo, okubizwa ngokuthi ama-infinity nama-volts avamile, okusho ukuthi i-voltage eningi kakhulu ebangeni elikhethiwe, imiyalelo yedivayisi yakho ihlanganisa lokhu.TM ngesikhathi sangempela?Ngenhla igridi ye-inclinometer.kuphela.
Ngibheke izibali ezimbalwa ezibomvu ze-Harbour Freight engizithole mahhala ngamakhuphoni.Idizayini embi, bengingeke ngiwasebenzise kumasekhethi anamandla amakhulu.Amabhola e-solder nemicu yonke indawo, futhi i-fuse iyingilazi nje.Ayikho i-fuse nhlobo kokokufaka okungu-10A, ojeke bakabhanana abangajwayelekile, izintambo zincane kakhulu ku-10A, futhi okokufaka kuncane kakhulu ku-600Vac/1000Vdc.
Umngane wami akazange abheke imitha yakhe waze wabheka indawo yokomisa engu-240V.Waxhuma enye i-10A yaqhuma imitha.Ngisho ukuqhuma okukhulu kakhulu, ukukhanya, futhi izingxenye ezimbili zandiza zahlukana.Ngenhlanhla ubengalubambi, ngenhlanhla ucingo abeluphethe aluncibilika.
Ngicabanga ukuthi ngithenge eyami ngo-$15 nge-humfest ethile.Uma usebenzisa i-google, maningi amaphrojekthi ku-inthanethi asebenzisa ama-FET ukuze akhe.
Ungathenga i-DMM ngo-£5 e-Maplin e-UK.I-Maplin ingumnikezeli wezinto zikagesi onegama elihle lamanani aphansi!Ngaphambili, babethengisa izingxenye eziyinhloko.Igatsha eliseduze nami lisendaweni yezitolo ngaphandle kwedolobha, indawo yaseMaplin cishe iyingxenye yenkundla yebhola lezinyawo, futhi ayinawo ama-transistors angaphezu kwama-2 ohlobo ngalunye.Ngokwesibonelo, 2 transistors.Amabili, ama-transistors ahlukene, izisekelo ezi-2, abaqoqi be-2, enye.Okunye kunga-odwa egatsheni.
Kudabukisa kancane.Esinye isitolo sigcwele izitembu zesiShayina, ungathola izinto ezingcono nezishibhile ezindaweni ezifanele zezimpahla zabathengi, kanye nezipho ezintsha, amathoyizi amane amathoyizi amane nokunye okunjalo.Izinga lakho konke lishibhile kakhulu, kodwa intengo yokudayisa ye-Maplin ibiza kakhulu.
Ngicabanga njengeRadio Shack ngaphambi kokuwa.Kuyadabukisa ukuthanda uMaplin, ikhathalogi yabo yonyaka yayifana nezithombe zocansi zentsha.Amakhasi angama-500 noma ngaphezulu, uhlu olukhulu lwezingxenye!Manje sekungama-walkie-talkies e-PMR aphelelwe yisikhathi kanye nama-motherboards e-PC aphelelwe yisikhathi ngo-60% ngaphezu kwalokho obungakhokha kumthengisi ozimele.Kodwa ngesizathu esithile akukho umakhalekhukhwini.Lokhu kuseyilungelo lezitolo zamafoni akhethekile.
Kunoma yikuphi, ngingasho ukuthi ngisho nesihloko esinjalo se-bootleg sizothengisa ama-multimeters nge-£ 5, ngaphandle kokuthi i-Maplin ibulale amaphupho ami.Kwenye indawo, kungaba uchungechunge lwezitolo ze-DIY.Noma, kunjalo, ku-inthanethi.Ungathola i-multimeter ngemali ephansi kakhulu.Kwesinye isikhathi abizwa ngokuthi “izihloli zikagesi zasendlini” noma okuthile ukuze amamitha abiza kakhulu angabonakali emba eqolo.Ngibe nambalwa angabizi phakathi neminyaka edlule futhi angikhonondi.Ngokuvamile i-transistor tester nayo yakhelwa ngaphakathi. Eqinisweni, kunezinto ezibiza kakhulu.Angazi ukuthi uyini umehluko.Ngifuna ukwakhiwa kwekhwalithi.Okwami ​​akukaze kungqongqoze, ngakho iminyaka eminingi yonke into isimi ngononina.
Ngaphandle kwalokho, uma nje ufuna ukukhweza okuthile ku-PSU yakho, ungathola futhi ama-Voltmeter/Ammeters e-LED ku-Ebay ngentengo ephansi kakhulu kulezi zinsuku.Imvamisa i-PCB engenacala, noma iyiphi indlela othanda ukuyikhweza.Umbala we-LED enezigaba ezingu-7 ozikhethele yona (yebo, akudingekile ukuba ukhethe okuluhlaza okwesibhakabhaka!).
Hhayi ncamashi mahhala, kodwa kwanele ukukhokhela.Ngicabange ukuthi uma othile ezinikeza mahhala, kuzoba eyodwa yawo wonke amakhasimende, futhi kuphela uma ukuthenga kulungile.
Manje ungenza kangcono.I-Arduino ingaskena iphinikhodi ye-DDS.I-AD9851 isebenza kufika ku-60 noma 70 MHz.Amafrikhwensi aphezulu angafinyelelwa ngokuphindwe kabili kanye nama-triplers.Izitholi zamandla e-Logarithmic zingakala amasignali phezu kwebanga elibanzi kakhulu lamandla kanye nemvamisa.Intelligent LCD touch display ukubonisa imvamisa impendulo.
Nansi ividiyo enolwazi oluhle kakhulu, ngicabanga ukuthi ngike ngayibona ngaphambili, ngivele ngashayisa izihlungi ze-duplexer/cavity nge-YT AI futhi ngathi... ngiqhamuke nale mitha ye-engeli ye-reticle:
gosh kusobala ukuthi angisona isigebengu.Angikhumbuli ngizwa nge-inclinometer (ngenza iphrojekthi yami yokuqala ye-elekthronikhi eminyakeni engu-50 edlule - kwakuyisamukeli se-quartz - awekho amabhethri, ucingo olude oluphuma efasiteleni lekamelo lami lokuvula umoya) Kungakho ngi 'Ngifunda i-Hackaday, ukuze ngifunde okusha… ngenhlanhla akumele ngiyisebenzise.Izinto ezifana nokusebenza ne-ESP8266 IOT zingigcine ngimatasa futhi angizange ngingene endaweni entsha.Kunoma yikuphi, siyabonga ngokuthunyelwe okuthakazelisa kakhulu.
Nokho, nginokumbalwa, kodwa uma usaqala futhi ufuna ithuluzi elisebenza ngempela, cishe awufuni ukubhekana nezibani nabangaphakathi abakhulu uma kunezinye izindlela ezinhle zesimo esiqinile.Manje, uma uqoqa, kwehlukile.
Amashubhu ayaguga ngokuhamba kwesikhathi futhi, ngokwazi kwami, aziphatha ngendlela engafanele njengoba esebenzisa izintambo zefilament futhi akhe amadiphozithi.Hlanganisa lokho nokuba nazo kudivayisi endala futhi umphumela ungase ungabi yilokho okufunayo.
Ithiyori yakho mayelana neshubhu ayilungile kakhulu: "intambo yefilament" (ebizwa kahle ngokuthi i-filament) ayithinteki ngokufakwa kwemali.Lona umbono oyiphutha, udida imininingwane noma yikanjani, ishubhu yokudlulisa ihlushwa i-cathodic stripping ku-voltage ephezulu, ingalethi okwamanje i-heater efanele kwasekuqaleni.Lokhu akuphazamisi ishubhu eyamukelayo.Okwesibili, uma usebenzisa imitha, ngiyakwamukela, izibani zingahlala amahora angaphezu kuka-5000.Nginemishini yokuhlola evela kuma-50s, amanyuvesi namalebhu anamalambu akudala.Phela, awekho ama-downsides kuma-tube inclinometers, abanye baphikisa ngokuthi amashubhu e-vacuum empeleni angcono ekutholeni ukutsheka kweshubhu kunedlanzana noma ama-diode omhubhe ngenxa yezimpawu zokunqamuka kweshubhu.Ngiphakamisa ukuthi uthole ishubhu eshibhile ene-analog gauge, futhi uma unquma ukuthi udinga izinsimbi namakhwela ngesibonisi sedijithali, hamba ngayo.
Ngine-Measurements 59 inclinometer engisanda kuyibuyisela ukuze ngithande isimo esisha.Ngifake isixhumi se-SMA ohlangothini olulodwa lwecala le-oscillator kanye "ne-sniffer" ngaphakathi eduze kwesibani se-oscillator esingu-955.Imitha yami yedijithali ye-StarTek ikhombisa ngokunembile imvamisa yokukhala kwe-antenna yami yesicupho nanoma iyiphi enye i-inductor lapho ukucwiliswa kwenzeka;isikali sayo sokuqala se-analog sisanembile ngokumangalisayo.Akukubi ngensimbi ye-70s elula kakhulu futhi ethokozisayo ukuyisebenzisa…
Amalambu enza ama-GDO alula futhi angikaze ngibe nenkinga ngezinto zamandla zangaphandle.Uma umuntu ekwazi ukumba i-Nuvistor, izokwenza iphakethe elincane.
Ezinye zezinkinga ezinama-"GDO" e-solid-state ukuthi ama-bipolar transistors awafani ngqo namashubhu, futhi ama-transistors asekuqaleni ayentula ukuzuza kanye nokusabela okuphezulu kwemvamisa.Angazi ukuthi i-Heathkit Tunnel Bucket isebenza kahle kangakanani, kodwa ingesinye isisetshenziswa.Ngakho-ke amakhamera amaningi angemuva asebenzisa ezinye izindlela ukubona ukwehla.Ama-FET avela njengamashubhu kagesi aphansi, isango lehla njengegridi, ama-MOSFET avela, nawo kufanele ehle, kodwa ngokuvamile ungabona umtshina we-RF ukuze ubone ukwehla.Ekupheleni kuka-1971, abafana baseMillen bachaza ukusebenzisa ama-MOSFET ukuze baguqule i-GO yabo edumile ibe yisimo sezwe esithengisekayo.I-chassis efanayo, amakhoyili nama-trimmer capacitor.Ngokuphazima kweso, ukujikeleza kweshubhu “okulula” kudinga umsebenzi omningi, okuhlanganisa nokuklinywa okuningi kwe-RF, ukuze kumiswe ngaphandle kokucwiliswa kwamanga.
Angikaze ngakhe, kodwa amashubhu abonakala elula futhi lawo athengiswayo ayinkimbinkimbi kakhulu.
Ngicabanga ukuthi i-GDO yanyamalala ngenxa yezinye izisetshenziswa zokuhlola.Kodwa intengo nayo inyukile.I-Heathkit noma i-Eico ishibhile futhi eziseduze kakhulu zikusigaba samadola ayikhulu noma ngaphezulu.
Mhlawumbe emibuthanweni yabathanda ukuzilibazisa, kodwa amashubhu asasetshenziswa kakhulu ku-TV/UHF enamandla amakhulu nezinhlelo zokusebenza zemicrowave/satellite… #NotAllTubes
Ungabuka lesi sitatimende.http://spectrum.ieee.org/semiconductors/devices/the-quest-for-the-ultimate-vacuum-tube
Ngokuhlangenwe nakho kwami, izinkezo ze-vacuum tube *zingcono* kunezinkezo eziqinile.I-Eico yami ilungile, njengoMillen Dipper.I-Hit transistor ladles iyisilinganiso nje, amalebula awo omhubhe mabi.Ngakho-ke inqobo nje uma uthola esebenzayo (noma ongayilungisa), iminyaka akufanele ibe yisici.
Iladi elihle lingakwazi “kuzwa” ukujikeleza kwe-resonant lisuka kude… ayidingi ukuxhunywa ngqo kukhoyili njengoba kuboniswe kuvidiyo.Futhi, imitha kufanele izinze uma ushuna usuka kolunye uhlangothi lobubanzi uye kwelinye.Abantu abampofu bavame ukuba nezinto eziningi ezingelona iqiniso.
I-Big Dipper isiza ukuveza lokho *ngempela* okwenzekayo kuchungechunge.Yonke i-capacitor ine-inductance futhi yonke i-inductor inamandla.Lokhu kusho ukuthi zidlidliza ngokwemvelo ngefrikhwensi ethile.Futhi, i-bypass capacitor yakho iba i-inductor, ngakho-ke kubi kakhulu kunokungenamsebenzi!I-Big Dipper ingaphinda ibonise ukuthi isifunda sakho sinokunyakaziswa okuyinkohliso kumaza okungalindelekile, noma ukuthi izwela ngendlela engavamile ku-RF kumaza athile.