Hloov Kho LDC Condenser Microphone Pheej Yig: 7 Kauj Ruam (nrog Duab)

2024 Tus sau: John Day | [email protected]. Kawg hloov kho: 2024-01-30 09:24

Kuv tau ua tus txiv leej tub lub suab ntev thiab nyiam DIY'er. Uas txhais tau tias kuv nyiam hom haujlwm uas cuam tshuam nrog Suab. Kuv kuj yog tus ntseeg ruaj khov tias rau DIY qhov project kom txias yuav tsum muaj ib ntawm ob qhov txiaj ntsig los ua kom txoj haujlwm tsim nyog ua. Nws ib yam yuav tsum yog qee yam uas koj tsis tuaj yeem ua lag luam, lossis qee yam koj tuaj yeem tsim koj tus kheej uas yog txoj hauv kev pheej yig dua li kev yuav khoom dab tsi uas muaj muag. Txoj haujlwm no yog yam thib ob. Ua kom pheej yig tab sis zoo LDC microphone. LDC sawv rau "Loj Diaphragm Condenser". Txoj haujlwm no tuaj yeem tsim ua kwv yees li $ 50 hauv ib feem thiab kev sib tw microphones raug nqi ntau dua. Nws nyob ntsiag to, suab nruab nrab heev, thiab yuav ua haujlwm loj SPL (Qib Siab Siab).

Ua ntej me ntsis keeb kwm ntawm microphones. There muaj peb hom yooj yim siv rau studio thiab siv suab nyob; dynamic microphones, ribbon microphones, thiab condenser microphones. Lub microphone zoo li tus hais lus tab sis rov qab. Lub diaphragm me me tau txuas ua ke ntawm cov hlau uas txav mus thaum lub suab tsoo lub diaphragm. Cov kauj yog nyob hauv qhov chaw sib nqus. Thaum nws txav lub teeb liab hluav taws xob me me tau tsim uas koj tuaj yeem tom qab ntawd nthuav tawm lossis kaw uas sawv cev rau lub suab. Ribbon microphone zoo ib yam tshwj tsis yog cov hlua, ib daim nyias nyias ntawm cov ntawv ci, feem ntau yog txhuas, tau muab tso rau hauv qhov chaw sib nqus. Lub suab tsis zoo ua rau cov hlua txav mus rau tom teb thiab tau tsim hluav taws xob teeb liab. Nyeem ntxiv ntawm no: Microphones

Lub condenser microphone pib nrog daim nyias nyias nyias uas muaj cov hlau sputtered rau nws kom nws ua hluav taws xob. Daim nyias nyias tau ncab thiab muab tso ze rau ntawm lub phaj rov qab los ua lub peev xwm. Yawg Ryckebusch siv los hu cov capacitors condensers thiab tam sim no koj paub tias peb yuav tsum tau hu lawv lub microphones capacitor tiag tiag … Thaum lub suab tsis tsoo lub diaphragm thiab nws txav mus, lub peev xwm hloov pauv. Yog tias muaj tus nqi ntawm lub capacitor, yuav muaj qhov hloov pauv qhov hluav taws xob uas sib haum rau lub suab. Zoo li lwm ob lub microphone tsim saum toj no, yog tias koj ua kom nrov nrov lossis kaw qhov hluav taws xob, koj tau txais lub suab. Muaj ob yam ntawm condenser microphones. Qee tus siv qhov hluav taws xob siab (50-70 volts) kom them lub tswm ciab thiab lwm tus siv qhov hu ua Electret Capsule. Electret (Electrostatic) muaj qhov them tas mus li nrog nws nyeem ntawm no: Electret.

Qhov no txhais tau li cas rau peb yog tias yog peb siv Electret tsiav tshuaj tsis tas yuav siv 50-60 volts rau nws, uas txhais tau tias yooj yim siv hluav taws xob.

ib qho txiaj ntsig ntawm lub condenser microphone yog tias lub diaphragm tuaj yeem ua lub teeb pom kev zoo thiab nws yooj yim dua kom tau txais cov lus teb nrawm dua nrog ib qho. Qhov tsis zoo yog tias koj yuav tsum tau ceev faj heev thaum tau txais lub teeb liab tawm ntawm lub diaphragm yam tsis muaj suab nrov ntxiv uas coj peb mus rau cov khoom siv hluav taws xob.

Txhawm rau rub lub teeb liab tawm ntawm cov tshuaj ntsiav koj xav tau lub cuab yeej tiv thaiv kab mob siab heev. Cov raj muaj qhov npog no thiab yog txoj hauv kev tseem ceeb no tau ua tiav 40 xyoo dhau los. Tsis tau mus rau hauv kev sib cav ntawm sonic zoo ntawm raj vs lwm yam, koj yuav tsum lees; siv lub raj sab hauv lub cev microphone tsis qiv nws tus kheej kom yooj yim. Los yog cov txuj ci DIY ib txwm muaj! Tom qab lub raj siv Field Effect Transistor lossis FET tau tsim. Nov yog qhov feem ntau cov condenser microphones ua haujlwm niaj hnub no. Txawm tias qhov pheej yig tiag tiag mic capsules muaj ib qho nyob sab hauv. Lub tuam txhab German Schoeps. sib cav tias yog ib lub tuam txhab tsim khoom siv microphone sab saum toj hauv ntiaj teb, tsim cov khoom siv hluav taws xob rau condensers microphones uas tau piav qhia qhov no tau ua tiav ntev npaum li cas dhau los. Saib ntawm Schoeps Circuit kom paub meej. (Yog tias koj google "Schoeps Circuit" qhov no yog qhov koj pom!) Lub Circuit Court khiav tawm ntawm phantom zog los ntawm mic pre-amp. Ib feem ntawm qhov kev siv hluav taws xob no siv los tsim kom muaj qhov ruaj khov siab kom them lub tsiav tshuaj. Hauv peb qhov xwm txheej peb tsis xav tau qhov ntawd. Lub zej zog DIY tau yooj yim rau hauv Circuit no mus rau nws daim ntawv yooj yim rau electret tsiav tshuaj uas yuav luag zoo ib yam rau thawj Schoeps Circuit. Scott Helmke tau tsim qhov hloov pauv ntawm Circuit Court no rau nws "Alice" lub microphone. Kuv siv tib lub Circuit Court nrog qhov txawv me ntsis thiab qhov sib txawv FET transistor. Kuv xaiv J305 uas yog siv los ntawm ob peb ntawm cov khoom lag luam siab kawg. Kuv nyob ntawm no. Koj tuaj yeem siv cov npe teev los ntawm Scott. Nws daim ntawv teev npe kawg yog los ntawm 2013 thiab cov khoom muaj los ntawm Mouser thiab Digikey. Kuv tau tsim lub Circuit Court ntawm daim duab me me uas zoo tshaj rau haum hauv lub cev microphone.

Nov yog qhov Circuit Court ua haujlwm li cas; cia saib lub teeb liab txoj kev ces lub zog:

1Gig (Yog ib gigohm…) resistor tsim teeb liab tawm ntawm lub tsiav tshuaj. FET thiab ob qho 2.43K resistors tsim cov theem sib cais thiab hloov pauv. Ob lub.47uF capacitors ob peb lub cim rau ob lub bipolar transistors. Cov no yog PNP transistors teeb tsa ua cov xa tawm. Ob 100K resistors tsis ncaj ncees rau transistors. Uber yooj yim. Yog tias koj xav tsis thoob txog 1gig resistor, nws yog tus yuam sij rau lub condenser microphone. Nws tseem yog cov khoom siv kim tshaj plaws, tuaj txog ntawm $ 2 txhua los ntawm Digikey. Ntawm lub zog sab, peb txuas lub microphone rau phantom lub zog tsim lub tov khoom lossis preamp. Qhov ntawd nqa 48 volts rau tus pin 2 thiab 3 ntawm XLR txuas thiab ob lub transistors. Hloov kho Lub Kaum Hli 2015: Kuv ntxiv ob 22nF capacitors ntawm XLR jacks thiab ob 49Ohm 1% resistors ntawm cov tswv yim rau transistors rau RF suab nrov. Kuv tsis paub qhov no txog thaum kuv siv lub mic sib txawv preamp thaum nyob hauv ib puag ncig "nrov nrov". Schematic hloov tshiab! 6.8K resistor thiab zener diode coj qhov ntawd thiab poob rau 12 volts. 10uF thiab 68uf capacitors nrog rau 330Ohm resistor lim qhov no thiab muab qhov hluav taws xob ruaj khov rau FET Circuitry. Ib zaug ntxiv, yooj yim heev thiab muaj kuab heev. Qhov tseem ceeb tivthaiv thiab ib qho uas peb tseem tsis tau tham txog yog tshuaj ntsiav nws tus kheej. Kuv tab tom siv TSB2555B los ntawm JLI cov khoom siv hluav taws xob. nws yog tshuaj ntsiav Transound thiab yog dab tsi ua rau txoj haujlwm no nws yog dab tsi. Nws raug nqi $ 12.95 thiab siv npib tsib xee hloov kub ntawm lub diaphragm. Nws kuj tseem siv ua lag luam tsawg kawg ib lub microphone kuv paub, CAD e100s.

Tam sim no peb muaj cov tshuaj ntsiav thiab cov khoom siv hluav taws xob txhua qhov teeb tsa, koj tuaj yeem tsim ib qho ntawm cov no mus rau txhua lub tsev uas koj xav tau. Kuv tau sim qhov no thiab kawm ob peb yam. Vim tias qhov siab tshaj ntawm cov tshuaj ntsiav thiab FET cov khoom siv hluav taws xob, cov xov hlau nruab nrab ntawm ob qho ua zoo li lub kav hlau txais xov thiab tshwj tsis yog txhua yam tau ua kom zoo tiv thaiv los ntawm cov hlau lossis lub vijtsam hlau, koj yuav muaj txhua yam suab nrov. los ntawm txhua qhov RF xau rau hauv. Hauv qhov tseem ceeb koj yuav tsum tau muab cov tshuaj ntsiav thiab khoom siv hluav taws xob tso rau hauv Faraday tawb.

Kuv pom txoj hauv kev yooj yim dua li tsim kuv tus kheej. Nws hloov tawm tias muaj ntau lub Suav tsim cov mics pheej yig tiag tiag uas muaj cov hlau zoo zoo me ntsis cov khoom siv hluav taws xob zoo (zoo ib yam hauv Circuit …) thiab lub tsiav tshuaj me me. Thiab tus nqi kwv yees li $ 20 bucks. Lawv ua lub cev pub dawb zoo, uas yog yam peb siv nws rau. Nrhiav lawv ntawm eBay los ntawm kev tshawb nrhiav "BM700" thiab "BM800" microphones. Kuv tau txais kuv li ntawm $ 22. Qhov txaus siab raws li koj tuaj yeem pom daim duab nws tsis hais BM800 rau nws. Nws kuj tseem tuaj hauv ntawv xa ntawv nrog lub npuas ua npuas ncauj tab sis tsis muaj lub thawv. OK, tam sim no peb tau npog keeb kwm yav dhau, cia tsim ib qho!

Kho kom raug: 9 Lub Kaum Hli: Nov yog qee lub suab nrog cov kaw kuv cov menyuam ntaus nkauj hauv tsev kawm theem siab: Guyer HS Intermezzo Orchestra

Kauj Ruam 1: Kauj Ruam Ib: Cov Khoom Siv Hluav Taws Xob

Cov khoom siv hluav taws xob tau yooj yim ua rau ntawm qee lub rooj tsav tsheb. Kuv txiav kuv li 1 "los ntawm kwv yees li 1.5" tom qab ntawd ua rau nws los ntawm PNP transistors ua haujlwm rau FET kawg. Qhov tseem ceeb ntawm no yog kev sib tshuam ntawm FET Gate thiab 1gig resistor. Daim ntawv ceeb toom kuv "ntab" cov coj. Nov yog qhov chaw FET lub qhov rooj rau cov tshuaj ntsiav txuas. Peb tsis xav kom kov ib yam dab tsi lossis siv lub rooj sib tham hauv Circuit Court uas kuv muaj cov dej ntws tawm los yog nyiam cov dej noo nyob hauv ib puag ncig cov av noo. Kuj saib ntawm qhov chaw ntawm FET. Saib cov ntawv xov xwm hauv kab lus. Kuv muaj kuv tus pin 1 ntawm FET thim rov qab kom txog thaum kuv paub txoj haujlwm tau hais tseg hauv cov ntaub ntawv yog qhov pom ntawm transistor, tsis yog hauv qab. Yog tias koj siv Scotts pom zoo FET, rub tawm daim ntawv cov ntaub ntawv thiab nyeem nws! Kuv tshuav ib qho chaw rau ib sab uas lat kuv laum ib lub qhov loj txaus rau cov ntsia hlau ntsia los tuav nws mus rau lub chassis. Kuv tau muaj hmoo nyob ntawm no … Kuv ua qhov no ua ntej kuv xav txog qhov kuv yuav mus rau nws li cas.

Kauj Ruam 2: Kauj Ruam Ob: Tshem Tawm Thawj Lub Suab Microphone

Coj lub microphone lub cev thiab ntswj lub hauv paus. Qhov no yuav cia koj xaub tawm ntawm lub tes tsho hlau uas npog thaj tsam hauv cheeb tsam. Nco tseg: Koj lub mic yuav txawv. Kuv tau yuav cov khoom no los ntawm cov neeg muag khoom sib txawv thiab lawv zoo ib yam tab sis txawv txav. Tom qab lub tes tsho raug tshem tawm ob lub ntsia hlau me me tuav hauv thawj daim phiaj xwm txheej. Tom qab ntawd tsis txhob txhuam qhov qis dua peb xaim. Peb yuav rov siv cov no los txuas lub rooj tsav xwm tshiab rau XLR txuas. Koj tuaj yeem txiav lossis tshem tawm cov kab tshuaj ntsiav. Peb yuav hloov cov ntawd.

Tam sim no tshem tawm ob lub ntsia hlau tuav lub pob tawb mus rau lub tsev. Lub pob tawb tawm los thiab nthuav tawm thawj lub tshuaj ntsiav. Lub hauv paus no tau teeb tsa me ntsis ua npuas ncauj thiab nias rau hauv lub yas yas yas tuav. Txuag cov ntsia hlau!

Muaj ob lub hau ntswj uas tuav lub hau yas ntsaws rau lub thav duab hlau. Tshem tawm cov ntawd thiab cais ob qho. Tam sim no koj muaj lub microphone uas tau muab tshem tawm tag nrho.

Kauj Ruam 3: Kauj Ruam Peb: Npaj thiab Txhim Kho Cov Tshuaj Tshiab

Kuv tau tsim ob qho ntawm cov no thiab cov neeg tuav tshuaj ntsiav tau sib txawv. Hauv qhov no koj tuaj yeem ua tib zoo thawb lub tshuaj ntsiav qub thiab tom qab ntawd tshem tawm cov npuas dej. Lwm qhov tsis muaj ua npuas ncauj tab sis me me sab yas txuas ntxiv txhua 90 degrees. Kuv txiav cov ntawd nrog cov snips me me thiab tom qab ntawd siv cov kua nplaum kub los tuav lub tshuaj ntsiav tshiab nyob hauv qhov chaw. Hauv lub mic no kuv txiav ib daim me me ntawm ua npuas ncauj thiab siv nws los nias lub tsiav tshuaj tshiab rau nws. Ua ntej ua qhov no koj yuav xav tau cov kab laug sab luv ua los ntawm cov tshuaj ntsiav mus rau cov khoom siv hluav taws xob. Kuv siv qee qhov 24 gauge stranded wire kuv twb muaj lawm. Koj tuaj yeem rov qab siv cov tshuaj ntsiav thawj zaug yog tias koj nyiam. Kuv nyiam teflon insulated xaim. Cov rwb thaiv tsev tsis yaj thaum raug kov los ntawm cov hlau yaj.

Kauj Ruam 4: Kauj Ruam Plaub: Rov Ntsuas Capsule Mount

Siv ob lub ntsia hlau me me thiab rov txuas lub tsiav tshuaj ntxiv. Muaj plaub qhov me me tab sis tsuas yog ob qho ntawm lawv tau xaws. Qhov no zoo ib yam ntawm ob ntawm kuv lub microphones. Ua zoo saib kom tsis txhob nyob qhov twg tab ntawm lub hauv paus ntawm cov hlau thav duab. Cov tab ntsib cov kev taw qhia ntawm lub suab. Nws kab nrog lub tes tsho hlau uas tau luam tawm nrog lub microphone lub npe. Tam sim no qhov no yuav txawv! Ib qho ntawm kuv tsis tau sau npe hlo li. Koj tuaj yeem nyeem lub npe khoom lag luam ntawm no. Tsis txhob xav tias nws yuav dhau los ua tsev neeg lub npe sai sai. Ib zaug uas tau teeb tsa pub cov xov hlau me me rau lub tsiav tshuaj los ntawm lwm qhov hauv lub thav duab hlau.

Kauj Ruam 5: Kauj Ruam Tsib: Mount thiab Txuas Cov Khoom Siv Hluav Taws Xob, Tom qab ntawd rov sib sau ua ke

Hauv kuv qhov xwm txheej kuv tau tsim kuv lub rooj tsav xwm hauv ntej ua ntej kuv txiav txim siab seb kuv yuav mus rau nws li cas. Qhov no yuav tsum tau siv lub qhov nyob hauv nws nrog txhua yam khoom siv uas twb muaj lawm. Tsis yog txoj hauv kev zoo tshaj los ua qhov no. Kuv muaj ob peb lub me me 4-40 lub kaum sab xis rau kev teeb tsa cov phiajcim hauv kuv qhov phiaj xwm. Siv ib qho ntawm cov uas kuv tau teeb tsa lub rooj tsav xwm rau lub thav duab hlau. Koj tuaj yeem nce lub baord ncaj qha tsuav koj tsis tsim luv.

Thaum teeb tsa txuas lub XLR txuas rau ntawm qhov ntsuas. Tom qab ntawd txuas lub tshuaj ntsiav. Saib xyuas ntawm lub tsiav tshuaj tseem ceeb ua kom zoo raws li nws txuas mus rau qhov sib txuas ntawm 1gig ohm resistor thiab lub qhov rooj txhuas ntawm FET. Qhov no ntab saum huab cua kom ntseeg tau tias muaj kev sib txuas zoo heev.

Xaub lub tes tsho hlau nyob hauv qhov chaw rov qab. Nco tseg lub tab thiab qhov sib thooj me me ntawm lub tes tsho.

Ntsia rau ntawm lub hauv paus xov thiab lub microphone ua tiav.

Kauj Ruam 6: Xeem, Siv, thiab Tshawb Fawb Ntxiv

Txuas koj lub microphone tshiab mus rau tov khoom lossis mic pre-amp nrog phantom zog thiab xyuas kom nws ua haujlwm. Cov teeb meem feem ntau yog los ntawm kev xaim tsis raug. Hum lossis buzz feem ntau yog qhov teeb meem hauv av.

Lub microphone no sawv ntsug nrog rau feem ntau diaphragm condensers. Kuv muaj ob peb tus neeg zoo tiag tiag thiab nws xa tuaj. Ua haujlwm tau zoo ntawm kev hu nkauj, acoustic guitar. Kuv tab tom ua haujlwm kom tau txais ob peb yam kaw nrog nws thiab yuav muab cov ntawv txuas rau hauv Cov Lus Qhia thaum kuv ua.

Kuv zoo siab heev nrog kev ua tau zoo ntawm lub mic no. Nws yog txhua yam los ntawm $ 13 mic capsule (tsawg dua yog tias koj yuav kaum…) Kuv yog 90% ua tiav ntawm txoj haujlwm nrog ntau lub tsiav tshuaj rau kaw lub tso suab. Cov lus qhia ntawd yuav los sai sai no.

Hloov Kho Lub Kaum Hli 2015: Kuv tau muaj sijhawm los sau cov nkauj nrog cov Soundcloud txuas no. Kuv kuj tau ua suab nrov rau cov neeg ua haujlwm pub dawb Khoom noj khoom haus fest thiab muaj kev lom zem ntawm kev siv cov no ntawm theem nrog ntau tus kws tshaj lij txuj ci thiab Jazz Trio. Mic suab zoo thiab pob tshab heev.

Yog xav paub ntau ntxiv txog DIY microphones feem ntau Kuv pom zoo kom pab pawg tsim lub microphone ntawm Pawg IO.

Thiab yog tias koj xav tsim lossis hloov kho lub xov tooj cua uas tsis siv hluav taws xob kos tawm Microphone Parts. Kuv tau tsim ib khub mics siv nws CK-12 Capsule.

Zoo siab kaw cia!

Kauj ruam 7: Hloov kho Lub Ib Hlis 2016! Pimp ntawd Circuit

Tom qab tsim ob peb ntawm cov no, kawm thawj Schoeps Circuit thiab tau kawm me ntsis los ntawm qee tus qub tub rog ntawm pab pawg tsim mic Kuv tuaj nrog kev txhim kho Circuit. Kuv hu nws "Pimped Alice" Muaj peb qhov kev hloov pauv tseem ceeb:

1. Qhov sib ntxiv ntawm ob qho ntxiv RF thiab EMI kev tiv thaiv hluav taws xob. Ob qho 470pF uas khi lub hauv paus ntawm ob PNP transistors rau hauv av. Cov no pab tawm nrog txhua yam FET khaws thiab txwv cov bandwidth ntawm PNP cov neeg tso tawm.

2. Qhov feem uas muab 12V rau FET Circuit tau hloov pauv. Peb muaj 47uF capacitor them los ntawm phantom zog los rau hauv mic los ntawm XLR pins 2 & 3 mus txog 49.9 ohm resistors thiab ob PNP transistors. Cov khoom siv yog txoj hauv kev zoo uas tsis muaj kev cuam tshuam rau lub suab ua ntu zus tu tej yam me ntsis. Los ntawm qhov ntawd peb mus rau 4.7K resistor rau zener diode. Cov resistor no teeb tsa thiab txwv cov kev coj ua tam sim no uas zener diode siv. Zener diodes tuaj yeem tsim hluav taws xob me me vim yog lawv ua haujlwm li cas. 330 resistor thiab 100uF capacitor lim uas tawm thiab tswj tau qhov huv huv DC voltage rau FET thiab 2.4K resistor theem splitter.

3. Lub lauj kaub 1Meg yog qhov tshiab. Qhov no kho qhov kev tsis ncaj ncees ntawm FET. Qhov no yog tej zaum qhov kev txhim kho loj tshaj plaws hauv Circuit Court. Raws li lub lauj kaub tau hloov kho peb tab tom sim faib qhov hluav taws xob uas zener tsim tawm kom kwv yees li ib nrab tau poob hla FET thiab lwm qhov ib nrab faib ntawm ob lub 2.4K resistors. Nov yog qhov yooj yim ua. Ua ntej yuav txuas lub microphone tiag tiag koj yuav tsum txuas lub Circuit Court mus rau lub microphone ua ntej amp yog li peb tuaj yeem ua lub zog hluav taws xob. Ntsuas qhov ntsuas hluav taws xob ntawm + tus pin ntawm 100uF capacitor hais txog hauv av. Hauv kuv "raws li tsim" cov hluav taws xob kuv muaj txog 11.5 txog 11.8 volts. Ntsuas qhov hluav taws xob thiab faib ua plaub. Hais tias qhov hluav taws xob yog 12 VDC. Sib faib los ntawm plaub muab rau peb 3 VDC. Thaum ntsuas ntawm taw tes "A" (saib kab hluav taws xob) kho lub lauj kaub kom txog thaum koj tau txais 3 VDC. Ntsuas qhov hluav taws xob ntawm qhov "B" koj yuav tsum muaj 9 VDC. Lub lauj kaub yog kaum lub lauj kaub tig los npaj kom tig cov ntsia hlau me me ob peb zaug. Yav dhau los tib neeg yuav ua qhov no thiab hloov pauv cov neeg tawm tsam rau qhov tseem ceeb ntawm lub lauj kaub teeb. Thaum qhov ntawd yuav txuag tau ob peb xees, nws yog lub sijhawm siv sijhawm. Siv lub lauj kaub yog qhov yooj yim dua.

Koj tuaj yeem pom kuv tus protoboard tsim ua ntej thiab nraub qaum. Ob lub xub taw qhia rau PNP transistor collists thiab yog qhov uas koj yuav txuas 49.9ohm resistors ntawm txoj kev mus rau XLR txuas. Ib zaug ntxiv 22nF lub kaus mom nyob ntawm XLR txuas.

Lwm qhov zoo tshaj plaws yog tus tswv cuab ntawm Mic Builder pab pawg ntawm Yahoo tsim ib qho ntawm no siv "Pimped" version ntawm Circuit thiab xa nws mus rau lwm tus tswv cuab uas sim lub microphone. Nyeem txog qhov ntawd ntawm Audioimprov ntawm no: Homero's Pimped Alice. Cov lus qhia luv luv yog qhov Circuit Court tsis raug ntau thiab suab nrov hauv xov tooj qis dua qhov tshuaj ntsiav yuav muab tso rau hauv chav zoo nkauj. Tsis tas li, Homero tsim lub PC board rau qhov no thiab ua siab dawb muab txhua daim ntawv rau nws. Nws yog ib sab thiab yuav haum rau Suav khob ntawm mics BM-700 thiab BM-800's

Tam sim no kuv muaj plaub ntawm cov no hauv kuv lub locker mic thiab kuv zoo siab heev nrog lawv. Kaw kev xav ntawm ntu. FET saum toj no yog qhov hloov pauv rau J305. Ib qho twg yuav ua haujlwm. Thaum yuav cov resistors thiab capacitors tus nqi poob qis yog tias koj yuav ntau. Kuv pom zoo kom yuav cov resistors ib puas ntawm ib lub sijhawm thiab cov khoom me me zoo ib yam. Kuv feem ntau mus tsawg dua rau cov electrolytic loj dua. Yog tias koj txuas ntxiv nrog kev nyiam ua haujlwm zoo ntawm hluav taws xob, koj yuav pom ntawm qee lub sijhawm koj twb muaj yam koj xav tau los tsim txoj haujlwm tom ntej.

Ua tsaug rau Henry thiab Homero los ntawm Mic Builder pab pawg ntawm Yahoo! Tham txog kev sib koom tes ua haujlwm zoo rau Cov Kws Tsim Khoom, Tsim thiab DIY'ers nyob ntawd.

Qhov khoom plig thib ob hauv DIY Audio and Music Contest