Kab lus yuav tham txog yuav ua li cas ua ULF nrog koj tus kheej txhais tes los ntawm cov ntaub ntawv improvised. Thiab qhov kev nyiam yuav tsuas yog muab rau cov qauv tsim uas txawm tias ib tug novice xov tooj cua amateur uas nyuam qhuav kawm nyeem cov duab hluav taws xob hluav taws xob tuaj yeem rov ua dua. Tab sis thawj yam ua ntej. Yuav pib nrog, nws tsim nyog sau cia tias muaj plaub hom circuits: ntawm lub teeb, transistors, microcircuits, nrog rau kev sib xyaw, uas tuaj yeem muaj ntau hom khoom. Piv txwv li, lub preamplifier tuaj yeem sib sau ua ke ntawm transistors, thiab qhov kawg amplifier ntawm cov raj.
Yuav ua li cas xaiv?
Nws tsim nyog txiav txim siab seb koj xav tau dab tsi los ntawm lub cuab yeej thiab thaj chaw twg koj yuav siv nws. Nws nyob ntawm qhov twg ULF tswvyim yuav raug siv. Tab sis nyob rau hauv txhua rooj plaub, ntawm chav kawm, kev xaiv ntawm ib tug niaj hnub lub hauv paus ntsiab lus yog qhov zoo tshaj plaws tov. Thov nco ntsoov tias cov cuab yeej siv teeb pom kev zoo muaj qhov tsis zoo - lub zog loj heev. Thiab tam sim no nws yuav nyuaj heev nrhiav transformers. Thiab yog tias tsis muaj cov khoom lag luam ntawm cov teeb, ces yog tias ib qho ua tsis tiav, koj yuav poob koj lub amplifier. Ua rau ntawm ULF teebua-nws-koj tus kheej yog qhov yooj yim heev, tsuas yog tus qauv tsim tawm los ua cumbersome.
Transistor tsim zoo nkauj dua, tab sis lawv kuj muaj qhov tsis zoo. Nrog sheer circuit complexity, koj tau txais hluav taws xob tsawg heev. Nws yog qhov zoo uas koj tuaj yeem tau txais lub rooj tsav xwm loj loj, uas cov ntsiab lus nyob ze rau ib leeg, thiab lub zog ntawm tag nrho cov cuab yeej no tsis ntau tshaj 10 watts. Yog li ntawd, qhov kev xaiv thib peb tseem nyob - kev siv microcircuits. Yooj yim, txhim khu kev qha, ruaj khov (nrog kev siv kom zoo).
PCB
Koj tuaj yeem nruab rau hauv thaj chaw me me, yog li ib daim ntawv ci 30x30 mm loj txaus rau koj. Tab sis koj tuaj yeem siv lub npe hu ua ntses - textolite nrog qhov rau mounting ntsiab thiab me me ntawm cov hlau nyob ib ncig ntawm lawv. Qhov no yuav yog qhov kev daws teeb meem zoo tshaj plaws. Ua ib qho yooj yim ULF nrog koj tus kheej tes yog qhov teeb meem ntawm ob peb feeb.
Yog tias tsuas muaj ntawv ci textolite, ces koj yuav tau txiav grooves rau nws. Lawv yuav tso cai rau koj ua ob peb thaj ua rau tooj liab ntawm lub rooj tsav xwm me. Tag nrho cov ntsiab lus ntawm lub amplifier yuav raug ntsia rau ntawm lawv. Thov nco ntsoov tias cov khoom siv hluav taws xob tuaj yeem ua tau ob qho tib si los ntawm qhov tseem ceeb ntawm ULF, thiab ua ke nrog.
Power Amplifier
Raws li txoj cai, 9-18 volt fais fab yog txaus rau lub tsev amplifiers. Cov no yog cov qauv voltage qhov tseem ceeb, transformers tuaj yeem pom yuav luag txhua qhov chaw. Cov txheej txheem muab hluav taws xob yog tus qauv -transformer, plaub diodes thiab lub capacitor nrog lub peev xwm tsawg kawg yog 100 microfarads kom tshem tawm ntawm qhov sib txawv ntawm cov khoom siv hluav taws xob.
Tab sis ntau nyob ntawm seb ULF lub tswv yim yuav siv rau hauv koj tus qauv tsim. Yog tias koj npaj yuav sib sau ua ke ULF lub zog qis, ces koj yuav tsum tau saib cov ntaub ntawv ntawm microcircuit uas koj yuav siv. Ua tib zoo mloog tshwj xeeb rau cov kab uas qhia qhov khoom siv hluav taws xob. Yog tias qhov poob rau 5 V tau txais, ces nws muaj peev xwm siv tau los ntawm lub xov tooj.
Yuav ua li cas sib sau ua ke amplifier
ULF ntawm microcircuits xav tau cua txias ntxiv. Qee zaum txawm tias cov qauv hluav taws xob qis ua kom muaj cua sov ntau. Yog li ntawd, nws yog ib qho tseem ceeb uas yuav tsum tau siv aluminium heatsinks kom txias txias.
Yog tias koj tab tom sib sau ua ke ULF muaj zog nrog koj tus kheej tes, ces koj yuav tsum ua tib zoo xav txog qhov teeb meem ntawm qhov txias. Nws yog qhov ua tau tias yuav tsum muaj kev txhim kho ntxiv ntawm lub txias txias.
Feem ntau, kev sib sau ULF nrog koj tus kheej txhais tes yuav tsum tsis txhob nyuaj. Tag nrho cov ntsiab lus txuas nrog raws li lub tswv yim. Thiab tom qab kev tswj xyuas thiab txuas ntxiv, lub zog tau muab thiab lub teeb liab qhov chaw txuas nrog cov khoom siv. Ntawm chav kawm, cov zis xav tau ib tug load - ib tug hais lus. Nrog lub nti ua haujlwm, lub amplifier pib ua haujlwm yam tsis muaj kev teeb tsa. Nws yog tsim nyog sau cia tias nws yog qhov zoo tshaj plaws los siv lub amplifier circuit uas tau muab rau hauv cov ntaub ntawv ntawm microcircuit. Hauv cov qauv txheej txheem no, txhua yam, txawm tias qhov tsawg tshaj plaws nuances ntawm kev ua haujlwm ntawm ib qho microcircuit, raug coj mus rau hauv tus account. Thiab nws yuav ua hauj lwm zoo tsuas yog coj mus rau hauv tus account cov nuances. Siv cov duab kos los ntawmunverified qhov chaw, koj yuav ua puas lub nti. Thiab qee zaum nws tus nqi siab heev.
