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 (DIY)B1 buffer pre-amp PCB (Jilid 2)

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+31
alius
Nico Endra
indra_co_maniz
Moegeni
im4m_okee
Arief-B
davesg88
didiet78
ervinl
didiks
ferynov
dono
jascool
opa teguh
m461c14n
bayu_er
alfiore
dmiko
gwendy
terry
yoko_pratama
bayoex
crt
Ady Mardianto
eudea
bayu_107
sutantoroy
yadi
sithot28
bjO
Antoni Pasaribu
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AuthorMessage
Antoni Pasaribu
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Antoni Pasaribu


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(DIY)B1 buffer pre-amp PCB (Jilid 2) - Page 10 Empty
PostSubject: (DIY)B1 buffer pre-amp PCB (Jilid 2)   (DIY)B1 buffer pre-amp PCB (Jilid 2) - Page 10 EmptyThu Mar 11, 2010 12:40 am

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(DIY)B1 buffer pre-amp PCB

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bayu_er
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(DIY)B1 buffer pre-amp PCB (Jilid 2) - Page 10 Empty
PostSubject: Re: (DIY)B1 buffer pre-amp PCB (Jilid 2)   (DIY)B1 buffer pre-amp PCB (Jilid 2) - Page 10 EmptyTue Apr 13, 2010 11:28 pm

yoko_pratama wrote:

@kang bayu kalo mau melow diganti aja ampnya pake si unyil 1875 he he he he

yah.....sama aja, GC LM 3886 jadi gak kepakai dong.....?.
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Arief-B
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(DIY)B1 buffer pre-amp PCB (Jilid 2) - Page 10 Empty
PostSubject: Re: (DIY)B1 buffer pre-amp PCB (Jilid 2)   (DIY)B1 buffer pre-amp PCB (Jilid 2) - Page 10 EmptyWed Apr 14, 2010 2:41 pm

wuih..... tambah seru aja proyek B1 ini. pantau terus......
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terry
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(DIY)B1 buffer pre-amp PCB (Jilid 2) - Page 10 Empty
PostSubject: Re: (DIY)B1 buffer pre-amp PCB (Jilid 2)   (DIY)B1 buffer pre-amp PCB (Jilid 2) - Page 10 EmptyFri Apr 16, 2010 9:30 am

bayu_er wrote:
Aku juga mau kalau B1 bersuara mellow layaknya tube buffer,
Tolong rombakin B1 .....mas Ervini......,siapa tahu lebih murah dari tube buffer......Kan Asyikkkk ....

3875 + B1 = mellow Very Happy 3886nya copot aja ekspor ke Lapak Blok C ide
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sithot28
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(DIY)B1 buffer pre-amp PCB (Jilid 2) - Page 10 Empty
PostSubject: Re: (DIY)B1 buffer pre-amp PCB (Jilid 2)   (DIY)B1 buffer pre-amp PCB (Jilid 2) - Page 10 EmptyFri Apr 16, 2010 9:43 am

3875-nya order dari siapa mas tery ? harganya gimana ?
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terry
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PostSubject: Re: (DIY)B1 buffer pre-amp PCB (Jilid 2)   (DIY)B1 buffer pre-amp PCB (Jilid 2) - Page 10 EmptyFri Apr 16, 2010 9:47 am

langsung ke pak Lurah aja kang Sithot Very Happy
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sithot28
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PostSubject: Re: (DIY)B1 buffer pre-amp PCB (Jilid 2)   (DIY)B1 buffer pre-amp PCB (Jilid 2) - Page 10 EmptyFri Apr 16, 2010 10:31 am

B1 salas saya waktu dinyalain bersamaan dg GC 3886 ada dengung (noise) sebelum relay 'ON', tetapi dengung tadi ilang sama sekali waktu relay udah 'ON', apakah wajar ? kalo gak wajar, gimana cara ngilangin dengung tsb.

tq
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eudea
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PostSubject: Re: (DIY)B1 buffer pre-amp PCB (Jilid 2)   (DIY)B1 buffer pre-amp PCB (Jilid 2) - Page 10 EmptyFri Apr 16, 2010 10:38 am

pake BC517 untuk menggantikan BC546 (sebelah kiri) di bagian delay. works fine with me. Very Happy
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sithot28
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PostSubject: Re: (DIY)B1 buffer pre-amp PCB (Jilid 2)   (DIY)B1 buffer pre-amp PCB (Jilid 2) - Page 10 EmptyFri Apr 16, 2010 11:04 am

trus di kaki bc-nya di bypass caps 100nf itu ya mas yuda ???

tq
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eudea
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(DIY)B1 buffer pre-amp PCB (Jilid 2) - Page 10 Empty
PostSubject: Re: (DIY)B1 buffer pre-amp PCB (Jilid 2)   (DIY)B1 buffer pre-amp PCB (Jilid 2) - Page 10 EmptyFri Apr 16, 2010 1:16 pm

kalo udah pake BC517 ndak perlu di bypass. tapi kalo pake BC546 harus dibypass 100nF.
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jascool
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(DIY)B1 buffer pre-amp PCB (Jilid 2) - Page 10 Empty
PostSubject: Re: (DIY)B1 buffer pre-amp PCB (Jilid 2)   (DIY)B1 buffer pre-amp PCB (Jilid 2) - Page 10 EmptyFri Apr 16, 2010 7:01 pm

eudea wrote:
kalo udah pake BC517 ndak perlu di bypass. tapi kalo pake BC546 harus dibypass 100nF.

sepertinya kasusnya mas sithot ini beda deh dgn kasusnya mas Yadi yg waktu itu relaynya kena "chatter" kayaknya yg mas sithot alamin lebih ke masalah grounding mas cmiiw..
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eudea
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PostSubject: Re: (DIY)B1 buffer pre-amp PCB (Jilid 2)   (DIY)B1 buffer pre-amp PCB (Jilid 2) - Page 10 EmptyFri Apr 16, 2010 7:28 pm

@jascool : cmiiw juga. kirain kasusnya mas sithot ini juga karena si relay "agak" kurang pasokan setrum. makanya ada buzz sebelum bunyi klik. bunyi buzznya karena pelat relay di dalem tidak langsung kontak (bunyi klik). alias agak ngeden dulu.. setelah pemanasan cukup, baru nyetrum dan mak klik. sekali lagi cmiiw kalo analisa saya ngasal.
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sithot28
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PostSubject: Re: (DIY)B1 buffer pre-amp PCB (Jilid 2)   (DIY)B1 buffer pre-amp PCB (Jilid 2) - Page 10 EmptyFri Apr 16, 2010 7:44 pm

Kecurigaan saya juga masalah grounding, kalo soal supply ke relay sich no-problem...relay on dan off dengan normal.
Ada yg punya skema grounding yg bisa dijadiin reference ?

tq
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yoko_pratama
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PostSubject: Re: (DIY)B1 buffer pre-amp PCB (Jilid 2)   (DIY)B1 buffer pre-amp PCB (Jilid 2) - Page 10 EmptyFri Apr 16, 2010 7:49 pm

pakai skin sense aja mas raba2 ... kalau pas yang diraba hilang berarti disitu tempatnya yang kurang ground ... asal bukan tube aja yang diraba2 saya kira ngga akan kesetrum he he he he
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sithot28
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PostSubject: Re: (DIY)B1 buffer pre-amp PCB (Jilid 2)   (DIY)B1 buffer pre-amp PCB (Jilid 2) - Page 10 EmptySat Apr 17, 2010 8:05 am

Ok deh mas yoko, nanti aku coba. Skrg lagi ngepang kabel utp buat cabling antara B1 dan gc, 30 menit cuma dpt 1 meter hiks hiks
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eudea
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PostSubject: Re: (DIY)B1 buffer pre-amp PCB (Jilid 2)   (DIY)B1 buffer pre-amp PCB (Jilid 2) - Page 10 EmptySat Apr 17, 2010 8:52 am

sithot28 wrote:
Ok deh mas yoko, nanti aku coba. Skrg lagi ngepang kabel utp buat cabling antara B1 dan gc, 30 menit cuma dpt 1 meter hiks hiks

pake berapa kabel mas ? kalo setau saya yang bagus pakenya 4 biji. 2 ground dan 1 sinyal kanan dan 1 kiri.
btw, emang perlu brapa meter mas ? udah kok 1 meter masih hiks ?
tolong fotonya ya kalo udah jadi. heheheh.
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(DIY)B1 buffer pre-amp PCB (Jilid 2) - Page 10 Empty
PostSubject: Re: (DIY)B1 buffer pre-amp PCB (Jilid 2)   (DIY)B1 buffer pre-amp PCB (Jilid 2) - Page 10 EmptySat Apr 17, 2010 11:32 am

kelihatanya belum ada yg post..
http://www.diyaudio.com/forums/pass-labs/124889-b1-buffer-preamp-50.html
cuplikan:
salas said : Anyway, I tested +/-12V, +/-11V, +/-10V. Used Paul Simon's Graceland and listened for best harmonic and vocal integration. Surely there is difference for voltage choice. +/-10V gives the creamiest sound but loses some dynamic contrast. +/- 11V regains enough contrast and loses enough coherence, and +/-12V is like before when with +/-15V. Mainly starker and less hypnotic. I prefer +/-10V and there it stays. Less Hi-Fi, more music.
*Mind you that going lower than +/-10V isn't going the smoother and calmer. It isn't a trend. +/-9V sounds like +/-11V only a bit more pinched. +/-10V is the sweet spot where sibilance is more persuasively integrated, a fretless bass sounds more Pastorius trombone like, the brass shines edgeless, and the open guitar strums are cohesive.


=>sudah ada yg main2 dengan led?? bukan cuma karena dc offset-kan? Siul
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ferynov
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(DIY)B1 buffer pre-amp PCB (Jilid 2) - Page 10 Empty
PostSubject: Re: (DIY)B1 buffer pre-amp PCB (Jilid 2)   (DIY)B1 buffer pre-amp PCB (Jilid 2) - Page 10 EmptySat Apr 17, 2010 7:18 pm

@sihot28 maf br online, 3875 dpt dr jakarta forum tetangga Au***-id .. nick lucas
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bayoex
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PostSubject: Re: (DIY)B1 buffer pre-amp PCB (Jilid 2)   (DIY)B1 buffer pre-amp PCB (Jilid 2) - Page 10 EmptySun Apr 18, 2010 3:48 pm

[quote="gwendy"]
Quote :

karakter B1 bisa di set dengan merubah bias FET ( untuk B1 SF R220K )
coba saja R ini dinaik turunkan akan terasa bedanya. Smile
wadooh telat baca yg ini mas gwen, padahal kmrn abis ganti posisi resistor ini dari metal ke "yg coklat itu" dengan nilai tetep 220K, memang ada peningkatan di suara, tapi kuping dan sistem saya lagi menyesuakan karakter b1 ini Very Happy maklum kuping rongsokan saya di kasih b1 agak kaget.
thank mod ady atas lemparan resistornya :bir:
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sithot28
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PostSubject: Re: (DIY)B1 buffer pre-amp PCB (Jilid 2)   (DIY)B1 buffer pre-amp PCB (Jilid 2) - Page 10 EmptyMon Apr 19, 2010 8:11 am

eudea wrote:
sithot28 wrote:
Ok deh mas yoko, nanti aku coba. Skrg lagi ngepang kabel utp buat cabling antara B1 dan gc, 30 menit cuma dpt 1 meter hiks hiks

pake berapa kabel mas ? kalo setau saya yang bagus pakenya 4 biji. 2 ground dan 1 sinyal kanan dan 1 kiri.
btw, emang perlu brapa meter mas ? udah kok 1 meter masih hiks ?
tolong fotonya ya kalo udah jadi. heheheh.
Kemaren sy coba sambungkan bagian ground ke tanah basah he he, langsung hilang tuch noise/jitter yg besarnya, cuman noise yg di frek atas (terdengar dr tweeter) masih ada walaupun sedikit. Ntar dicari-cari lagi dech, tp kalo ada rekan yg punya ilmu ngilangin jitter high freq, boleh dong di share, biar cepet solve.
Targetku, bikin sistem 'peti-mati', alias gak ada noise apa-apa waktu di ON tanpa musik.
@mas euda, aku pakai 4 kabel mas, semua wiring aku ganti pakai UPT semua, high-nya rasanya makin bagus.

tq
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eudea
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PostSubject: Re: (DIY)B1 buffer pre-amp PCB (Jilid 2)   (DIY)B1 buffer pre-amp PCB (Jilid 2) - Page 10 EmptyMon Apr 19, 2010 9:16 am

@mas sithot : waahhh!! manteepp.. saya cobain juga ah.. skarang saya internal wiringnya masih pake kabel isoterik semua.
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