- #4002 [Spong], 24-04-19 08:08
- #4001 [Spong], 24-04-19 07:58非凡哥經典名曲
尾段一句老婆愈老愈可愛…唱得較*肉緊*而最尾呼喚飄紅姐姐亦有感性,
原來單端膽機升呢都係要借助(外國勢力) :-p - #4000 [Spong], 24-04-19 07:50冇*不愉快*意外發生
要播mono cd 比較左右聲道 -
- #3999 [Spong], 24-04-19 07:46^0^
- #3998 [Spong], 24-04-19 07:45收到第一隻轉插. 祖國貨造工唔錯
第一時間先試一支古董6j7 - #3997 [niceday009], 24-04-18 23:5445 SE......classic, I once visited a man in Taiwan who used 45 SE to drive Tannoy Westminster Royal
最後修改時間: 2024-04-18 23:55:11 - #3996 [johnnykmtang], 24-04-18 21:44My good old 45 SE mono amp back on stage.
The driver is 7N7 (loctal version of 6SN7)
1.5 watts rms only but very sweet sound. - #3995 [Spong], 24-04-15 11:37多謝各位提供寶貴意見
一於玩大啲,上淘宝買對6SJ7 轉EF37 插玩吓(小弟以前買落Mullard及GEC 各一對)
早幾日已經買咗對全新北京FU50$100亦改用U52 整流;
啲膽放庶冇用費事留嚟陪葬 :-( - #3994 [info2k], 24-04-15 11:12替代後微調工作點是必須的, 特性上兩個管子可以互換
最後修改時間: 2024-04-15 11:17:20 - #3993 [johnnykmtang], 24-04-15 10:49Drop in replacement.??? No No la.
Different tube would have its own characteristic. Dropping another type of tube will give you sound but it won't be working in the right operating condition.
Better not unless you know how to fine tune it after replacement of the tube.
Johnny - #3992 [info2k], 24-04-15 10:29#3991
網上及 Copilot AI 等, 有海量相關信息提供, 只要花點時間查證 - #3991 [Spong], 24-04-15 09:34多謝回覆
請問可否換上6sj7 直代? - #3990 [niceday009], 24-04-15 09:01#3986
好可能係以下綫路 - #3989 [info2k], 24-04-15 08:46#3988
看似是 6J8P 或同類型管
最後修改時間: 2024-04-15 08:51:26 - #3988 [Spong], 24-04-15 08:19另一角度
Thanks - #3987 [Spong], 24-04-15 08:18放大睇真啲
- #3986 [Spong], 24-04-15 08:17Tube Identification
——————————-
各位師兄
小弟玩單端機座右銘有如相機
各施各法貴有貴玩平有平玩
最近*有幸*購入一座FU 50,音色尚可,
遺憾是推動膽未能確認型號(已甩x晒字)
各位大師經驗豐裕,可否指示明燈?
(或最有可能是xx管子亦妙啊,擄小弟有限度觀察所得,是一支雙三極管)
多謝。
最後修改時間: 2024-04-15 08:21:25 - #3985 [johnnykmtang], 24-04-13 18:53TubeCAD balance phono amp
https://www.tubecad.com/july99/page9.html
I thought about this for some time. TubeCAD has an excellent article about it.
Johnny - #3984 [johnnykmtang], 24-04-13 07:58Yes, cascode would have much higher gain.
Using the J170 and ECC88 as per FVP5, the gain is approx 150 at the first cascode stage. The gain can be changed by adjusting the value of the source resistor to match with the output from the moving coil cartridge.
Pretty smart design.
Johnny - #3983 [niceday009], 24-04-13 06:52Yes, I have two phono amps using cascode JFET to 6DJ8
Counterpoint SA5000
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