- #1 [etsang3], 09-08-24 01:33
- #2 [etsang3], 09-08-24 01:33認住呢款散熱器,山水呢款散熱器散熱能力頗低,所以唔好調高BIAS黎"摩"機呀,危險呀!
- #3 [etsang3], 09-08-24 01:33睇落好似好污糟,不過用"天那水"一洗再風乾就,就好靚勒。
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- #4 [etsang3], 09-08-24 01:34
好勒!開工勒。老機...有不少"假焊"...執..執..執..
好不辛苦。
要執到敲打底板時時波器上無雜音為止。 - #5 [etsang3], 09-08-24 01:34表頭較番balance
- #6 [etsang3], 09-08-24 01:35還原底板插青春
- #7 [etsang3], 09-08-24 01:35主底板換走舊CAP,再少少補一補啦
- #8 [etsang3], 09-08-24 01:36穩壓板換CAP+MKP
- #9 [254mm], 09-08-24 10:28我真好欣賞你的修理文章, 每次都由頭看到尾, 你做嗰行, 難得工餘時間仲咁好心機整機, 真是 R33 福氣。
- #10 [hinhin], 09-08-24 13:33我真好欣賞你的修理文章, 每次都由頭看到尾, 你做嗰行, 難得工餘時間仲咁好心機整機, 真是 R33 福氣。x2
曾生我仲有部飛利普CD機303在你到,記得嗎?我吾急祇是問一問!謝謝
hinhin - #11 [etsang3], 09-08-24 23:13劉SIR, 真係多謝你關心,D溫情我好感覺到,多謝。
我有個傻想法,D網友見得多,最終會拎起他錶,學會修理自己amp的小問題。
另外,可能真係人越黎越老,對D舊物件越有感情,"好聲","音色"有代表性嘅機(代表HiFi嘅求真及認真嘅製作,代表我地一類人),我都想佢留起世上耐D。
舊機就係因為線路簡單少級數,"音樂感"勝過依家D新機。
要做得出有"音樂感"嘅機,個工程師要有"音樂感"至得。 - #12 [etsang3], 09-08-24 23:18hinhin兄,我記得,佢抬左番公司修理,佢個主驅摩打燒左一邊線圈,搐下搐下,要搵到個摩打換至得。佢咁舊可能搵唔到勒。
- #13 [ken1967], 09-08-24 23:40我真好欣賞你的修理文章
X2 - #14 [hinhin], 09-08-25 01:55曾生唔該你先
hinhin - #15 [samkee], 09-08-25 08:45我有個傻想法,D網友見得多,最終會拎起他錶,學會修理自己amp的小問題。
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依個絕對係正路個既想法,因為小弟已經膽粗粗拎辣雞,學人換老Amp電容。
多謝tsang sir每一篇修理貼文! - #16 [etsang3], 09-08-25 08:49多謝各位 ching support
- #17 [254mm], 09-08-25 09:12那想法絕對不傻, 玩得 Hi-Fi, 而不去學小小電子常識, 小小DIY, 小小修理, 就真傻, 那比鍾意玩車的而不懂小小修理汽車技術, 玩來有何意思!!
- #18 [etsang3], 10-01-04 19:56另一R33友嘅,BA3000,佢仲比埋部MOD到壞哂嘅CA3000我整添。呢部BA3000(100V)都係BIAS失調同埋零件老化咁啦。
一開波就換哂D新零件先再試啦。輸入換左粒靚10uF(BP)再釘粒0.1uF(MKP)起底度,應該會更通透勒。
開機。調好BIAS。調好對METER。"焚"機幾日,哎!發覺一邊D老管漏電(個身發哂霉)出DC飄移,要換勒。
換乜好呢? - #19 [numbertwo], 10-01-04 21:22tsang sir,
i have zero knowledge on electronics. but just interested to know ...
I saw from above pictures that you add some X2 class noise suppression capacitors. What are the purpose of these X2 class capacitors in the circuit ? it seems you are not trying to filter out high frequency noises.....
Sorry for my navie question
Tks a lot for comment !
(I saw X2 class printing on the "MKP cap" photos, the blue box type capacitors)
最後修改時間: 2010-01-04 21:25:00 - #20 [etsang3], 10-01-05 01:46X2 class MKP can pass (or shunt) Pulse signal (or called noise) to ground. For bi-polar ecap (below it), even it is very good quality (i.e Blackgate) its inductance effect causes it impedance increase over 10kHz. Thus, high freq. >10KHz starts to roll off of using ecap alone. The MKP here add another low impedance path from high to very high freq. to backup the ecap. To make the ecap more like an ideal cap. (The higher the freq the low the impedance to 100kHz)
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請多多包涵。
(我份正職又加左"辛"呀!真係苦過 DE DI。)
SANSUI BA3000
(1) 一邊METER低
(2) 一邊有NOISE
又係100V!不過D大CAP都仲"好眉好貌"
火牛水塘(先天)都唔差,不過如果完全雙份會更好。