- #350 [kslsfz], 17-08-22 00:36
- #349 [richards], 17-08-22 00:06
- #348 [richards], 17-08-21 21:39我其實好似係悦声見過部sun audio vt25 改 ux250. 有錯請見諒
__________________________________________________________________________
如果是用Sun Audio的VT-25改裝是可以的! -
- #347 [whysoserious], 17-08-21 17:16多謝 richards, 孟波, Landy168, vavlotube, Welborne, kslsfz, hk良心, hotiron 各位師兄,
To kslsfz兄: 明白
To Welborne兄: 明白
To hk良心兄: 請指教
To hotiron兄: 明白, 是 FW-20-14S
To Landy168兄: 係咪似我睇data唔得又想試? hehe
我其實好似係悦声見過部sun audio vt25 改 ux250. 有錯請見諒
最後修改時間: 2017-08-21 17:18:18 - #346 [Landy168], 17-08-21 16:17#344...
不如送畀我, 我幫佢慢慢試....
最後修改時間: 2017-08-21 16:17:50 - #345 [hotiron], 17-08-21 16:14why師兄,
1. 50, VT25(或同類vt25a,801,vt52,vt62) 不能互換.
2. 換上合適偏壓電阻50可以插入vt25做個實驗,但您的vt25輸出牛要能承受大很多電流避免牛芯飽和。 - #344 [hk良心], 17-08-21 16:11[#342] "送了一對50給我" 給你diy的第一步.
- #343 [welborne], 17-08-21 16:02師兄小心! 50膽很貴和珍貴!
- #342 [whysoserious], 17-08-21 14:48不是, 就係不太信先來問. 因有人送了一對50給我, 好奇心又唔想賣,多謝各位
最後修改時間: 2017-08-21 14:49:10 - #341 [Landy168], 17-08-21 14:27#340.
我覺得why師兄非常信任佢這位朋友,我地呢啲鍵盤網友,素未謀面,誠信值是零,係信都信朋友啦!啱嘅. - #340 [vavlotube], 17-08-21 14:17反而想知因何執意把50插入vt25後級上?
- #339 [Landy168], 17-08-21 13:12似乎why師兄還是覺得改小小嘢就可以隊支50落10Y機,勇氣可嘉,去馬啦!
試完出個試聽報告喎。
溫馨提示:50膽唔平...小心! - #338 [kslsfz], 17-08-21 12:22提醒吓你,用50如果係self bias,grid resistor唔能夠超過10k,你如果監粗放佢落隻vt25線路,真係唔知會發生乜事
- #337 [whysoserious], 17-08-21 11:36多謝各位大師, 係我問得唔好, 請見諒, 我再問朋友, 原來改陰極電阻. 50胆都合用14kohm牛
- #336 [Welborne], 17-08-20 19:03而且上forum 又冇要限智識水平,來參與的包括高手和新手,所問的問題什麼level 也可,最緊要虛心問和保持客氣語氣。
- #335 [Welborne], 17-08-20 18:58其實除了google,像r33 這樣的forum 區都是提供一個平台給各朋友找尋智識,所以在這裏問都冇乜問題,有人識答便可以答一下,分享一下心得,這是forum 的價值所在,老實說,乜都已經識就唔洗上forum,唔通日日上來打咭一人一句早晨晚安、或只係用來約飮茶咩⋯⋯我都係電子白痴一名,不過在r33認識了不少前輩,從中學習了一些。
- #334 [Landy168], 17-08-20 17:42剛剛check完 ... 呢二支膽特性真係風馬牛不相及, 大纜拉唔埋!!!
除咗燈絲電壓相同,其他特性根本完全不同!!!
話可以代替那朋友你可以唔再信佢!
最後修改時間: 2017-08-20 17:49:29 - #333 [vavlotube], 17-08-20 17:36whysoserious ching,
或者我試下答, 雖然兩者燈絲電流和電壓相同, 但在相同屏壓下, 50要求的推動電壓比VT25要大得多, 另外, 兩者建議的負載電阻(即輸出牛初級繞組)皆有相當大差距, 胡亂互用,聲音可能冇神冇氣和嚴重失真, 因此不建議互用
小弟半桶水,希望能解答到一點, 有錯望高手指正! - #332 [Landy168], 17-08-20 16:56#331.
原來都有做功課,如果你一早講出疑惑原因就可能更多師兄出手幫助,因為太多網友亂問又無禮貌!
我都找找資料先。 - #331 [whysoserious], 17-08-20 16:27對唔住,我以為有好多人似我識D唔識D,有人同我講得又有人話唔得。有人話負偏壓不同又有人話差幾十火不怕,大哥,我google 到就唔驶問,我真唔知這裏只给高階會員討論,真對不起。
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如果用兩級6sn7推乜都唔改用舊裝50就唔得,用新裝50就ok,因為無咗10k grid resistor限制
>Emission Labs.
Just like all other EML valve designs, the 50 is built like a tank and in contradiction is aesthetically near perfect. A very robust build using thick glass and ceramic socket. Where the originals and Shuguang have a "M"-form filament, the EML has tripled this length in "MMM", resulting in more evenly spread emission because of increased heater surface. A gold-grid is used and the plate-structure is also a bit larger compared to the others resulting in a higher admissible plate-dissipation, although normal operation is recommended. Also the 10K limitation on the grid does not apply, up to 250K can be used here. This valve also electrically sets itself like the original.