- #22 [黃百萬], 24-04-10 16:22Thank you tom55 師兄
- #21 [tom55], 24-04-10 14:27用平衡輸入會比較好聲D
因'The input stage of MC275 re-issue is completely different to old design. In balance input of re-issue, the positive and negative phase is push-pull amplified directly and coupled to output transformer to form a completed output waveform. This new design is to avoid the phase-splitter design in the traditional tube amplifier design. In single-end input of re-issue, the input itself forms +ve phase and use a half of 12AX7(V1) to invert input to form -ve phase. In this case, the signal of +ve and -ve phase is not mirror inverted since -ve phase is suffering distortion produced by an extra 12AX7 amplifier stage. This can explain why the balance input sounds better than the RCA input in the case of MC275 re-issue.' For schematic of new MC275, please see below : - #20 [tom55], 24-04-10 14:17#18
唔插唔得, V1燈絲是串聯V2取電。 -
- #19 [黃百萬], 24-04-10 12:34重有冇其他 唔好收埋分享吓lol
最後修改時間: 2024-04-10 12:38:47 - #18 [kx14cp1], 24-04-09 15:29#17 sorry sorry,我睇錯以為係宜家賣緊果款,你lee款上一代最左果支負責反相,俾rca用,平衡唔插都可以。你lee款唔太記得,不過睇圖就要插晒先得。
最後修改時間: 2024-04-09 15:33:50 - #17 [黃百萬], 24-04-09 15:17另外想知mono喇叭線係咪冇得選擇Ω數只可以咁插?thank you
- #16 [黃百萬], 24-04-09 15:06睇咗都唔明每一支瞻負責嘅嘢,每一支膽影響乜嘢?
- #15 [黃百萬], 24-04-09 15:02呢幅圖得V7係單獨
- #14 [羅密歐], 24-04-09 14:44要先了解清楚電路,燈絲是否串聯取電,否則不插某只膽,連其他膽也會受到牽連。
- #13 [kx14cp1], 24-04-09 14:15如果你RCA入,中間果支唔插都得,平衡就一定經。換12AX7效果相對比換12AT7效果應該明顯d。
最後修改時間: 2024-04-09 14:20:07 - #12 [黃百萬], 24-04-09 13:47係呀係呀,我就係想知道,換膽可以換得應啲
- #11 [kx14cp1], 24-04-09 12:51mk v同之前果d線路唔同,細膽排法都唔同。
最後修改時間: 2024-04-09 12:55:07 - #10 [吉時布甸], 24-04-09 12:49請教各位師兄, 小弟都想換膽, 請問如果原裝喺 12AX7, 可否用12AX7A代替,有A同冇A有什麼分別,THX!
- #9 [黃百萬], 24-04-09 12:06V1同duckduckd 師兄說法相反?,呢啲圖我見過好幾次,但係我完全唔識睇 lol ,,我係行平行輸入玩mono,咁即係v1用返厰膽,其他三友at7可換,之前用石452,而家275喜歡好多,要比啲心機玩得更好
最後修改時間: 2024-04-09 12:10:24 - #8 [tom55], 24-04-09 11:24換兩支x7就換第二(V2)同第五支(V5),如果用平衡輸入第一支(V1)可以唔洗理
- #7 [tom55], 24-04-09 11:13From mc275 mark 4 service manual
- #6 [黃百萬], 24-04-09 09:50大家玩275有冇咩心得呀 ,分享下thank you
- #5 [黃百萬], 24-04-09 09:49第一支好大影響收到,thank you
- #4 [黃百萬], 24-04-09 09:48唔係全新膽嚟嘅,換後聲音明顯好咗好多,而家諗住換埋at7嗰三支,thank you師兄
- #3 [duckduckb], 24-04-09 09:21V1 影響都幾大吓,唔同膽都爭好遠吓
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