Ntxiv Diode-Clipping Distortion rau Koj Guitar Amp: 6 Cov Kauj Ruam (nrog Duab)

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

Nov yog txoj hauv kev yooj yim los ntxiv qee "tom" rau koj lub suab paj nruag qub qub. Amplifier overdrive thiab distortion feem ntau ua tiav los ntawm teeb liab clipping-thawb qhov nce kom txog thaum lub teeb liab peaks raug txiav tawm. "Tiag" raj overdrive tsis tuaj yeem ua tsis muaj qhov hloov pauv loj (ntxiv qib preamp ntxiv, thiab lwm yam), tab sis ntawm no yog lwm qhov kev xaiv: Preamp clipping tuaj yeem simulated los ntawm kev teeb tsa lub diode-clipping Circuit. Qhov tseeb, qee lub tuam txhab npe nrov amp (Marshall thiab Fender, piv txwv li) tau siv diode clipping rau lub suab nrov dua (tshwj xeeb yog ntawm qhov qis.) Qhov tseeb, nws tau ua me ntsis ntawm kev rov tshwm sim hauv khw amps … Qhov txaus ntshai ntawm hloov lub raj suab mus rau qhov hnyav "muaj lub xeev" suab muaj. Cov raj kaw nrog lub xub pwg nyom softer thiab muaj lub suab zoo dua, sov sov…. Tab sis kev ua tib zoo tsim cov diode-clipper Circuit tuaj yeem ua raws li cov yam ntxwv raj. "Peak clipping" ze ze kwv yees cov raj ntau dua li "crossover clipping," uas yog ib txwm muaj rau transistor tsim. Ntxiv rau peb tuaj yeem siv asymmetrical clipping los hais txog qhov "raug" kev sib haum xeeb. Thiab txij li peb lub suab tshiab muaj nyob hauv lub raj amp, nws yuav pab ua kom cov nyhuv mos. Tau kawg, diode-clipping tuaj yeem siv (thiab yog) rau cov khoom siv hauv lub xeev, ib yam nkaus. Cov vis dis aus qhia txog peb qhov kev hloov pauv xaiv: 1) huv si; 2) nruab nrab clipping; 3) max clipping:

Lus ceeb toom: Qhov no yog "mod," thiab xav tau me ntsis ntawm rewiring. Txhua qhov feem ntau ceev faj txog kev tso tawm lub hwj chim muab cov lim lim rau ntawm no. Txhawm rau rov kho lawv: Tsis txhob kov cov khoom sab hauv ntawm lub guitar amp yam tsis tau ua ntej tso cov lim dej lim. Thov. Koj tuaj yeem ua phem rau koj tus kheej. Nov yog qhov txuas rau kuv qhov haujlwm amp qub, thiab ntu Tshem Tawm Cov Caps!

Kauj Ruam 1: Cia Xeem Tshuaj Diode Clipping …

Wow-thaum xub thawj siab, lub diode txuas lub teeb liab mus rau hauv av zoo li luv Circuit Court! Qhov no tuaj yeem ua haujlwm li cas? Hauv kev xav, diodes ua tam sim no hauv ib qho kev qhia xwb. Tab sis lawv tsis ua haujlwm "zoo kawg nkaus." Txhua qhov diodes muaj "qhov hluav taws xob rau pem hauv ntej" - lawv yuav tsis ua kom txog thaum qhov hluav taws xob tau mus txog yog tias lub diode txuas nrog ntawm txoj kab teeb liab thiab hauv av, lub teeb liab yuav tsis raug xa mus (shunted) mus rau hauv av kom txog thaum nws dhau rau pem hauv ntej voltage. Thiab txawm tias tom qab ntawd, tag nrho cov teeb liab tsis tau ploj mus, tsuas yog ib feem ntawm lub teeb liab saum toj no uas mus rau qhov hluav taws xob. Yog li nws cov peaks tsuas yog "txiav tawm." Tab sis nws kuj ua rau muaj kev txo qis ntau dua, vim qee qhov teeb liab poob lawm. Qhov ntawd tsis yog txhua yam phem! Clipping qhov nrov tshaj plaws kuj yog ib daim ntawv ntawm "txwv"-koj xoob qee qhov muaj zog, tab sis hais txog lub suab qis dua. Zoo li lub thawv ntim, diode-clipping qiv cov suab tua neeg ntawm qis dua. Koj tsev neeg, cov phooj ywg thiab cov neeg nyob ze yuav ua tsaug rau koj.

Kauj Ruam 2: Hom Diode Clipping

Qhov cuam tshuam cuam tshuam ua haujlwm hauv ob qho kev qhia txheeb ze rau hauv av-yog li cov kab hluav taws xob uas kaw ob qho zoo thiab tsis zoo teeb liab peaks yog ob lub diodes txuas nrog hauv cov lus qhia tawm tsam. Cov diodes tuaj yeem xaiv kom dhau ntau lub teeb liab raws li qhov tsim nyog. Ntau clipping sib npaug ntau dua qhov tsis sib xws. Thawj qhov kev qhia pom: 1) Lub teeb liab uas tsis tau kaw 2) Asymmetrical clipping, ib sab ntawm lub teeb liab (tsis txwv rau ib qho diode nkaus xwb.) 3) Symmetrical clipping, qhov twg ob qho tib si + thiab - teeb liab raug kaw sib npaug. 4) Asymmetrical clipping, ob sab. Variation #4, asymmetrical clipping, muab cov suab zoo tshaj plaws thiab "zoo li lub raj". Ntxiv rau, nws yog qhov hloov pauv tau tshaj plaws-txhua tus lej ntawm diodes hauv kab ntawv tuaj yeem siv los ua cov nyhuv. Daim ntawv ceeb toom tias LEDs tau siv ua diodes hauv piv txwv B thiab C! LEDs muaj qhov siab dua mus rau qhov hluav taws xob ntau dua li cov diodes raug, yog li cov clipping tuaj yeem ua tau zoo dua thiab hloov pauv.

Kauj Ruam 3: Tus Tsim

Raws li tau hais, siv kev sib xyaw ntawm diodes, suav nrog LEDs, yog txoj hauv kev zoo los pib. Kuv tau suav nrog cov txheej txheem, kab duab kab thiab daim duab (qhia qhov yooj yim ntawm qhov Circuit no yooj yim npaum li cas.)

Tom qab ntau qhov kev sib pauv hauv-thiab-tawm, kuv xaiv ua ke ntawm ib qho germanium diode, ib qho silicon diode thiab ib qho LED. -1N4148 (D1) thiab 1N60 (D2) rau kev sib zog ua ke ntawm ~ 1.05V-ib lub teeb liab (D3) nrog rau qhov hluav taws xob rau pem hauv ntej ntawm ~ 1.7V Cov diode pairings txuas nrog SW1, qhib-tawm -on ob-ncej hloov. Qhov chaw nruab nrab yog "tawm," lossis tsis muaj diode clipping txhua. Lwm qhov teeb tsa thib ob yog: - diodes txuas ncaj qha rau txoj kev teeb liab. - cov diodes txuas nrog los ntawm ib khub resistors (R1: 47K, R2: 100K) Qhov tsis kam ua rau cov clipping, uas ua rau pom cov txiaj ntsig. Thaum cov resistors txuas nrog, ntau dua ntawm lub raj raj lub teeb liab los ntawm. Muaj ntau txoj hauv kev los ua kom tiav qhov no, thiab qhov no tsuas yog piv txwv yooj yim (Saib "Lwm yam kev xaiv" kauj ruam rau cov ntaub ntawv ntau ntxiv.) Txhawm rau pab koj xaiv koj cov khoom, ntawm no yog cov hluav taws xob rau pem hauv ntej rau qee qhov diodes: ~ 790mV - 1N4148 (Silicon) ~ 265mV-1N60 (Germanium) ~ 1700mV-LED (liab) ~ 205mV-Schottky 1N5819 ~ 740mV-1n4001 (Silicon) Germanium diodes zoo li muaj qhov hloov pauv hloov pauv uas muab qhov tsis-linear, ntau dua "tubey "suab. Tab sis silicon diodes tuaj yeem ua kom pom tseeb "square yoj" cov hlau sib txawv, yog tias qhov ntawd yog koj li.

Ua ntej koj tsim nws: Nws yog ib qho tseem ceeb kom nkag siab tias qhov siab tshaj ntawm lub teeb liab qhov sib txawv yuav txawv heev, amp-rau-amp. Tsis muaj ib qho ua ke ntawm diodes yuav muab cov txiaj ntsig zoo ib yam hauv amps sib txawv. Thiab tsis muaj ib qho ua ke ntawm diodes suab zoo rau txhua tus, ib yam nkaus. Kev sim! Sim 2, 3, 4 lossis ntau dua diodes hauv koob. Khaws ob sab tsis sib luag, lossis siv cov hloov pauv kom coj lub teeb liab sib txawv. (Faj seeb: ntawm qee qhov amps, cov LED yuav ua rau pom kev-lawv tsis nyob hauv kuv lub amp, qhov siab tshaj plaws tsis siab txaus.)

Kauj Ruam 4: Ntxig rau Circuit

Raws nraim qhov twg yuav tsum tau ntxiv cov clipping Circuit? Zoo … ua ntej, qhov twg TSIS tso nws … --Tsis txhob ntxig rau ntawm lub Circuit input (ua ntej preamp.) Guitar Pib ntsais koj teeb tsis zoo, thiab txawm hais tias lub Circuit Court ua haujlwm ib nrab nrog lub tsheb tuaj tos tiag, nws yuav tsis ua haujlwm txhua qhov nrog lwm tus guitars.-- Tsis txhob ntxig rau hauv tus neeg tsav tsheb ntawm lub zog amp (tso tawm qhov hloov pauv thawj.) --Tsis txhob ntxig rau hauv cov khoom hloov pauv theem nrab / hais lus voj. txo qis) qhov ntim ntawm lub amp, tej zaum "kib" cov diodes, thiab tej zaum yuav ua rau lub hwj chim puas lossis cov hloov pauv hloov pauv.

Yog li, nws yuav mus qhov twg?-Tsis pub dhau, lossis tsuas yog tom qab preamp Circuit. Txoj kab liab qhia txog txoj kev teeb liab ntawm preamp thiab theem tso tawm. Cov amp no muaj ib theem preamp nkaus xwb, yog li qhov no tsuas yog qhov chaw siv tau (hauv qhov no.) Cov ntsiab lus B thiab C yog txhua qhov chaw muaj peev xwm txuas tau qhov txuas hluav taws xob. Kuv xaiv C, txij li lub amp no tsis nrov nrov, thiab tig lub ntim yuav hloov tus cwj pwm me ntsis. Kev sib txuas taw tes B tej zaum yuav zoo dua yog tias koj xav khaws tag nrho cov txiaj ntsig clipping thaum lub ntim tswj tau muab tso tseg. Point A tsis tsim nyog, vim yog DC phaj qhov hluav taws xob. Amps nrog ob lub raj preamp yog qhov zoo tshaj plaws-txhua lub teeb liab tsis pom kev ploj hauv qhov clipping tuaj yeem rov zoo los ntawm kev nce qib thib ob preamp theem. (Tau kawg, qhov ua ntej xav tias koj muaj kev tshaj lij los ua li ntawd …) Yuav muaj qee qhov txo qis nrog diode clipping-qee lub teeb liab yuav ploj. Qhov no tsis yog kev tu siab tiag tiag, txawm li cas los xij. Cov neeg ua si feem ntau xav kom tau txais "lub suab" ntawm qis dua.

Kauj Ruam 5: Lwm Cov Kev Xaiv …

Txawm hais tias kuv tau xaiv ib qho / tawm / ntawm Circuit, tus nqi sib txawv kuj tseem tuaj yeem tswj tau los ntawm kev yooj yim ntxiv POT. Tam sim no cov nyhuv tuaj yeem hloov kho, thiab qhov xav tau asymmetry "hu rau hauv." Nws yuav tsum tau sau tseg tias kuv tau ntxiv "kev tswj sib xyaw" ruaj rau kuv-ob lub resistors. Tab sis kev tswj hwm qhov sib txawv tuaj yeem muaj txiaj ntsig…. Thiab muaj ntau hom diode peb tsis tau npog: zener, silicon, lwm yam xim LED, thiab lwm yam. Txawm tias MOSFET transistors muaj qhov poob qis. Lip asymmetry-hloov cov lus qhia diodes, tseem yuav muaj qhov cuam tshuam. Qhov no tuaj yeem hais txog qhov khib lossis txawm tias sib haum xeeb. Xaiv seb lub suab twg zoo tshaj rau koj. Nws muaj ntau qhov sib txawv ntawm diode clipping circuits. Nov yog ob peb qhov txuas kom koj pib…:- DIY Ua Npaws: Diode Clipping- MOSFETs raws li diodes-- AMZ- Diode clipping staturation tswj- AMZ- "Warp" tswj- ntsuas diode clipping- AMZ- Mosfets thiab Zeners ua clipping diodes

Kauj Ruam 6: Tab sis Nws Zoo Li Cas?

Zoo, IMO, zoo nkauj heev … Nws twv yuav raug hu muab qhov nyuaj rau qhov txawv txav ntawm kuv lub amp. Tab sis nws yog lub amp me me, thiab qhov ua kom pom tseeb yog qhov tseem ceeb hauv qhov "puv-rau" teeb tsa. -delay-flange-mega-distortion effect. Koj zoo dua siv lub stompbox lossis chav zoo nkauj-mount fx. Tab sis yog tias koj nyiam lub suab ntawm koj lub amp huv, tej zaum koj yuav nyiam nws zoo dua nrog me ntsis "av." Ua siab ncaj, lub raj raj zoo nrog qee qhov hloov pauv tau tiag tiag coj tus yam ntxwv ntawm cov guitars sib txawv zoo dua li FX sab nraud. Thiab koj ib txwm tuaj yeem siv lub stompboxs nrog tus mod lawm …