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| nazeemshah |
 Posted: Sat Jul 25, 2009 10:17 am Post subject: mahaguru tube amp.... |
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Joined: 27 May 2007
Posts: 179
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ok...aku ade satu situation nih....aku ade satu tube amp roland bolt 100. preamp section memang dh kong so aku pakai dia punye power amp section je and preamp section aku guna carvin quad x preamp.....amp nih memang ok...tp sejak kebelakangan ni die quite emo la....
cth nye...bile dh on die tidak mencapai output yg sepatutnye....meaning ade bunyi kecik je mcm gain x cukup......then padam amp tu...then on balik...beberape kali baru die ok.....tp gile leceh la nak startup mcm nih.....bile die dh strable baru main ok....
dr segi filter caps dh tukar semuanya kecuali 1. 22uf 500v<-------cap ni aku x jumpe kat mane2......tube semua baru lagi.......4 6l6 jj......screen resistor 470 ohm pun dh tukar.......
pasal bias......die x leh diadjust sebab x ade trim pot untuk bias....
kepada yg berpengetahuan mengenai permasalahan saya.....diharap dpt tolong....thanks.....
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1962 Fender Stratocaster RI Custom Shop, 1957 Vintage Reissue Fender Strat, 1966 Fender Mustang, Ibanez FG100 Archtop, Carvin Quad X-AMP Tube Preamp,Yamaha SPX900 Multi effects, Roland BOLT 100 tube amp. |
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| ultraman_cosmo |
| Posted: Sat Jul 25, 2009 12:04 pm Post subject: |
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| nazeemshah |
| Posted: Sat Jul 25, 2009 1:58 pm Post subject: |
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Joined: 27 May 2007
Posts: 179
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ok then...bile dh tgk schematic...ape nak dibuat....heheh...actually dh usha schematic nih....
persoalannye...
1) berdasarkan symptom2 tersebut ape yg biase masalah?
2) mungkinkah berkaitan dengan power & output transformer?
3) adakah cap?
4) bagaimana untuk check bahawa filter caps berada dalam keadaan baik
5) bila dh off tube x panas pun....adakah ini menandakan bahawa bias pada tube tidak tepat.
6) bagaimanakah untuk menambah bias pot?
7) mcm mane nak check transformer-transformer maasih elok atau tidak?
8)adakah ini disebabkan tube socker yg dh tua?
9)
coz once bile dia dh ok....then die akan terus ok.....and kalau nak on amp tu pada keesokan harinye..maka berlakulah problem yg same balik...
actually ni fokus pada power amp section sahaja....
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1962 Fender Stratocaster RI Custom Shop, 1957 Vintage Reissue Fender Strat, 1966 Fender Mustang, Ibanez FG100 Archtop, Carvin Quad X-AMP Tube Preamp,Yamaha SPX900 Multi effects, Roland BOLT 100 tube amp. |
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| ultraman_cosmo |
| Posted: Sat Jul 25, 2009 11:45 pm Post subject: |
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Location: Mines resort city
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jan,
Kalo filter cap problem, dia humming dulu.
- kalo bias power amp terlebih, dia dah glow merah pastu terbakar putih dah.
- preamptube kat phase inverter ok kaaa.
- tube ne kita kena ukur voltage kat pin tube tu,
- gitu juga tranformer.
ko cucuk kat mana itu preamp quad,
- cucuk kat return kaaa
- or main in...
- kalo ko cucuk kat return,
- signal akan melalui, SW1 > Q14 and Q15
- ko boleh control presence and reverb.
- sebarang failure kepada Q14 and q15 pun akan effect the whole signal, tak kira lah tube section tu ok.
So aper yg ko boleh try.
- let Quad ko masuk return, but ko check signal from preamp out.
- Kalo preamp out bunyi macam problem sebelom ne, mean the problem adalah dekat area Q14 and 15 tu bukan the pada tube section.
Tapi kalo ko memang cucuk quad pada MAIN IN,
- mean ko dah bypass the Q14 and 15,
- no reverb, np presence control no master volume.
- aper yg ko boleh buat, dari Main in, ikut the signal sampai ko jumpa C15.
- ko boleh mod bikin master volume sebelom ini C15.
Aku lom sempat nak tengok the schematic keseluruhannya.
- sebab ko punya problem tu tak bunyi macam tube failure, bunyi macam transistor bias or source current problem.
- ko try masuk MAIN IN tengok problem masih ker tak.
- kalo tak ader mean problem dia kat area Q14/15 tu.
Thank
farid.
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| nazeemshah |
| Posted: Sun Jul 26, 2009 6:51 pm Post subject: |
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Joined: 27 May 2007
Posts: 179
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ok....aku x cucuk kat return....aku masuk ke power amp in......kalau cucuk return then bunyi ape pun x kuar...even the hole preamp section aku dh kuarkan..... ikut schematic and board layout....transistor yg ade cume q1 and q2....
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GEAR:
1962 Fender Stratocaster RI Custom Shop, 1957 Vintage Reissue Fender Strat, 1966 Fender Mustang, Ibanez FG100 Archtop, Carvin Quad X-AMP Tube Preamp,Yamaha SPX900 Multi effects, Roland BOLT 100 tube amp. |
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| nazeemshah |
| Posted: Thu Jul 30, 2009 8:49 pm Post subject: |
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Joined: 27 May 2007
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cosmo.....so rasenye ape yg perlu dibuat eh? nak kene tukar transistor 2 bijik tu ke?
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1962 Fender Stratocaster RI Custom Shop, 1957 Vintage Reissue Fender Strat, 1966 Fender Mustang, Ibanez FG100 Archtop, Carvin Quad X-AMP Tube Preamp,Yamaha SPX900 Multi effects, Roland BOLT 100 tube amp. |
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| ultraman_cosmo |
| Posted: Thu Jul 30, 2009 10:32 pm Post subject: |
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Gua rasa, ko ner bias ne kena tukar supaya tak berkongsi dengan 2 transistor tersebut.
- benda ne ko kena tanya Dr amp gua keyozose.
- kena ukur voltage masa volume drop tu.
- sebab kena pastikan all tube working great.
- Phase inverter pun kena check juga ne.
Kalo ko boleh carik transistor tu
- aper salah nya ko cuba tukar.
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| nazeemshah |
| Posted: Thu Jul 30, 2009 10:42 pm Post subject: |
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Joined: 27 May 2007
Posts: 179
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ok aku try tanye keyzersoze...poning-poning eh kopalo den....oh milah....oh milah.....
phase inverter pun baru lg tu.....tp NOS la..... JAN phillips 12 at7....rase nye ok....
lg satu character yg aku baru dpt tau....tp x sure lagi la....
kalau aku warm up lame.....then problem ni jd.....tp kalau aku on power then dalam 10 secs terus on standby die ok....
tp ni x sure lg la....maybe betul pengamatan aku...atau mungkin nasib2 je....
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1962 Fender Stratocaster RI Custom Shop, 1957 Vintage Reissue Fender Strat, 1966 Fender Mustang, Ibanez FG100 Archtop, Carvin Quad X-AMP Tube Preamp,Yamaha SPX900 Multi effects, Roland BOLT 100 tube amp. |
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| ultraman_cosmo |
| Posted: Thu Jul 30, 2009 10:47 pm Post subject: |
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Bukan aepr geng,
Susah tol nak diognose amp dalam net ne...
- kalo multimeter boleh cucuk bagi online baru senang. hahahahah
- pada gua kalo boleh mod, kasih itu bias dari -ve voltage pada resistor R7 and R8 tu dipisahkan dari transistor tu, lebih baik.
- So ko running power supply belah powertube jer.
- ko bawak the schematic sekali kat razi maybe dia boleh come out on somthing.
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| nazeemshah |
| Posted: Fri Jul 31, 2009 12:14 am Post subject: |
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Joined: 27 May 2007
Posts: 179
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ntah2 power resistor ni kot.......ceh...mcm kau nampak je ape yg tengah aku tgk nih.....
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GEAR:
1962 Fender Stratocaster RI Custom Shop, 1957 Vintage Reissue Fender Strat, 1966 Fender Mustang, Ibanez FG100 Archtop, Carvin Quad X-AMP Tube Preamp,Yamaha SPX900 Multi effects, Roland BOLT 100 tube amp. |
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| ultraman_cosmo |
| Posted: Fri Jul 31, 2009 12:48 am Post subject: |
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| nazeemshah wrote: | | ntah2 power resistor ni kot.......ceh...mcm kau nampak je ape yg tengah aku tgk nih..... |
- kekiri skit, aku tak nampak resister tu, ko lindung view gua.
- "buat buat macam nampak ne?"
- kakakakakak
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| nazeemshah |
| Posted: Fri Jul 31, 2009 10:00 am Post subject: |
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Joined: 27 May 2007
Posts: 179
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ok....aku ke kiri sket...dh nampak lom.....eh.....tajam lak bucu meja nih..... nanti aku alihkan gi tepat lain.....(pastu aku gi alihkan meja yg menyempit sblh aku...then gi toilet jap kencing...then duduk balik ke keadaan asal)....hmph ok x? kau nampak dh kan.....kakakaaakakakakaka!
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GEAR:
1962 Fender Stratocaster RI Custom Shop, 1957 Vintage Reissue Fender Strat, 1966 Fender Mustang, Ibanez FG100 Archtop, Carvin Quad X-AMP Tube Preamp,Yamaha SPX900 Multi effects, Roland BOLT 100 tube amp. |
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| ultraman_cosmo |
| Posted: Fri Jul 31, 2009 10:10 am Post subject: |
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| nazeemshah wrote: | | ok....aku ke kiri sket...dh nampak lom.....eh.....tajam lak bucu meja nih..... nanti aku alihkan gi tepat lain.....(pastu aku gi alihkan meja yg menyempit sblh aku...then gi toilet jap kencing...then duduk balik ke keadaan asal)....hmph ok x? kau nampak dh kan.....kakakaaakakakakaka! |
- ko ne diet la skit, dah separuh view gua, ko cover.
- letih aku menjengok kat luar monitor ne.
- aaaaaa, nampak nampak...
- itu belang belang reistor ada bekas burn kasih tukar laaa.
(semua resistor pun belang belang)
- kakkakkakakaakkaak
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| nazeemshah |
| Posted: Tue Aug 04, 2009 3:16 am Post subject: |
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Joined: 27 May 2007
Posts: 179
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akhirnye....kebelakangan ni aku try tukar phase inverter...than die jalan dh ok dh.....cume harap ia berkekalan mcm ni lah....harap2 betul la phase inverter sahaja yg ade hal....
terpikir nak mod tambah master volume n presence control n impendence selector kalau boleh....
bro cosmo...kat mane leh tambah bende ni eh ikut schematics tu...
SOALAN:
1) kalau tambah presence tu...bule ke tambah keterbukaan sound nye...atau kite just boleh kawal keterbukaan yg sedia ade....(if you know what i mean,,,,
2)Lg satu,
aku rase nak tukar op-amp dlm quad x tu....ADE BERBELAS KOT....uiih byk nye.....and sume ade socket ic(fuh best!),,,,,,kat mane leh dapat burr brown OPA2134PA nye chip eh? and berape satu lebih kurang?
tq.....
_________________
GEAR:
1962 Fender Stratocaster RI Custom Shop, 1957 Vintage Reissue Fender Strat, 1966 Fender Mustang, Ibanez FG100 Archtop, Carvin Quad X-AMP Tube Preamp,Yamaha SPX900 Multi effects, Roland BOLT 100 tube amp. |
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