兩聲道
CD機 | MD機 | SACD機 | DAC | CAS | 合拼擴音機 | 前級擴音機 | 後級擴音機 | 接線 | 喇叭線 | 揚聲器 | 耳機 | 耳機擴音機 | LP產品 | 膽機產品 | 開卷式錄音機 | 音響配件 | DIY音響 | 電源 | 家庭影院
電視機 | 投影機 | 錄影機 | DVD影碟機 | Blu-ray影碟機 | 多媒體播放器 | 機頂盒 | 多聲道擴音機 | 多聲道揚聲器 | 多聲道影音組合 | Mini音響組合 | 重低音揚聲器 | 輔助設備 | 同好會
同好會 | Accuphase | B&W | Burmester | Denon | Jadis | KEF | KRELL | Luxman | Marantz | Nuforce | OPPO | Pioneer | TEAC | WEISS | News
News | Blog | 其他
其他 | 所有 |
| 影音天地主旨 ﹝請按主旨作出回應﹞ 上頁 下頁 首頁 尾頁 | 寄件者 | 傳送日期
|
| [#21] 新手請教300B PSE Interstage 及output 牛 Lundahl 價對DIY其實真好吸引，公司亦有唔少DIYer去推廣，推到我反而有所保留。 睇情形，我估多數去馬MM。 多謝各師兄提點! |
Philbert  正式會員184.xxx.xxx.156 |
2025-08-10 06:53 | |
|
|
|||
| [#22] 新手請教300B PSE Interstage 及output 牛 我都覺得如果經濟能力許可，不妨攻頂！ 即係選用 MM! 相信唔會失望！ |
CodyChan 會員 119.xxx.xxx.157 |
2025-08-10 09:14 |
| [#23] 新手請教300B PSE Interstage 及output 牛 部舊機300Bxls賣咗比網友2年，上星期返嚟做換心手術，更換MM非晶芯輸出牛，喺貴少少，完全物有所值！  |
Baker.Steven 正式會員 123.xxx.xxx.20 |
2025-08-10 15:24 |
| [#24] 新手請教300B PSE Interstage 及output 牛 .  |
Baker.Steven 正式會員 123.xxx.xxx.20 |
2025-08-10 15:24 |
| [#25] 新手請教300B PSE Interstage 及output 牛 平民版用Lundahl Interstage transformer, LL1660-10mA 網上找到這線路如何? 出自: https://www.audiodesignguide.com/my/pse2.html  最後修改時間: 2025-08-14 13:38:51 |
Ck2007 正式會員 223.xxx.xxx.244 |
2025-08-14 13:37 |
| [#26] 新手請教300B PSE Interstage 及output 牛 #25 5842相信最少用18mA才會係約150V以上屏压得到較高線性，但線路图顯示用1660 10mA 品種應該係畫錯，購買時要指定18mA 品種 最後修改時間: 2025-08-14 18:25:43 |
niceday009 正式會員 219.xxx.xxx.96 |
2025-08-14 18:23 |
| [#27] 新手請教300B PSE Interstage 及output 牛 Alt T 接法是20ma 1:2.25, 唔知點解model 叫10ma  最後修改時間: 2025-08-14 20:57:23 |
Ck2007 正式會員 223.xxx.xxx.244 |
2025-08-14 20:56 |
| [#28] 新手請教300B PSE Interstage 及output 牛 LL1660/10mA 嘅turns ratio係 1+1+1+1:2.25+2.25 primary每個coil行10mA. Alt T connection係 (1+1)||(1+1):2.25+2.25 所以turns ratio變成2:4.5, 即1:2.25 (1+1)||(1+1) 就係兩個2x coils connected in parallel,所以就係20mA. 最後修改時間: 2025-08-14 21:14:23 |
bambino 正式會員 61.xxx.xxx.40 |
2025-08-14 21:09 |
| [#29] 新手請教300B PSE Interstage 及output 牛 哦原來係咁，我只是睇到佢綫路唔对應才出声提点 只是brainstorming, 可以睇下單端同好會介紹之Komuro 全直接300B綫路，plate choke 後直結比interstage 更少非綫性 |
niceday009 正式會員 219.xxx.xxx.96 |
2025-08-15 01:13 |
| [#30] 新手請教300B PSE Interstage 及output 牛 不同種類300B線路描述，可以話天下線路一大抄: https://community.fortunecity.ws/rivendell/xentar/1179/theory/seamptheory/SEAmplifiertheory.html Andrea Ciugfoli所撰output牛有啲奇怪，初級得1.2k，可能用Lundahl LL1623較合理。Interstage 牛有師兄建議用ALT. S接法效果較好。 |
Philbert 正式會員 184.xxx.xxx.156 |
2025-08-21 11:20 |
| [#31] 新手請教300B PSE Interstage 及output 牛 Hi Philbert, This is the parallel 300B direct coupled SE power amp posted by niceday009 recently. I believe this circuit is simple, fail safe, and high performance. Monolith has the output transformer for two 300B parallel available. I used many Monolith transformers for my tube amp projects too. Highly recommend. Johnny  |
johnnykmtang 會員 70.xxx.xxx.22 |
2025-08-21 21:18 |
| [#32] 新手請教300B PSE Interstage 及output 牛 ... 最後修改時間: 2025-08-21 22:15:20 |
DY2036 正式會員 124.xxx.xxx.26 |
2025-08-21 21:58 |
| [#33] 新手請教300B PSE Interstage 及output 牛 Thanks Johnny, I did placed an order for a pair of Monolith SA-19 output and ITA-01/25 interstage transformer. I guess they are still on summer holiday in EU region and no reply yet. In terms of circuit selection, I prefered as simple as possible meaning less amplification stage. This is easier to play around different drivers and tune the operation point even tailor made base on each driver tube characteristics with curve tracer. I do believe no circuit is perfect, many engineering dicision always got certain level of compromise. |
Philbert 正式會員 184.xxx.xxx.156 |
2025-08-22 00:16 |
| [#34] 新手請教300B PSE Interstage 及output 牛 Hi Philbert, Here is the schematic that you may consider. Johnny  |
johnnykmtang 會員 70.xxx.xxx.22 |
2025-08-25 17:15 |
| [#35] 新手請教300B PSE Interstage 及output 牛 Hi Johnny, The 150V zener you put it across 150V B+for 5842, does it reduce the power supply ripple effectively? Or it might generate a little noise in upper frequency(some said pure zener would behave like that) I seldom use shunt regulator Zener directly for B+, wondering if it would be worth putting one in my 3x300B project for ECC99 B+ 最後修改時間: 2025-08-25 21:49:01 |
niceday009 正式會員 182.xxx.xxx.114 |
2025-08-25 21:39 |
| [#36] 新手請教300B PSE Interstage 及output 牛 看了見多個線路，有用牛和電容做耦合，它們各有什麽好壞處？ 謝 |
leeks.leeks 正式會員 182.xxx.xxx.37 |
2025-08-26 09:02 |
| [#37] 新手請教300B PSE Interstage 及output 牛 Re: 有用牛和電容做耦合，它們各有什麽好壞處？ 有用牛和電容做耦合, 加直結. |
Ck2007 正式會員 223.xxx.xxx.244 |
2025-08-26 11:01 |
| [#38] 新手請教300B PSE Interstage 及output 牛 Using simple zener diode as voltage regulator because I want to keep the B+ for the 5842/417A stable regardless of the variation of the tube. The driver tube using the inductive load would have much lower distortion than Resistor load and Capacitor coupling. Also, With use of interstage transformer, the 300B can be driven into A2 mode which would provide extra few watts. Johnny 最後修改時間: 2025-08-26 14:04:44 |
johnnykmtang 會員 70.xxx.xxx.22 |
2025-08-26 13:58 |
| [#39] 新手請教300B PSE Interstage 及output 牛 Glad to see Steven Baker's testing instruments :- Rigol signal generator and oscilloscope. They are really nice one.  |
johnnykmtang 會員 70.xxx.xxx.22 |
2025-08-26 14:12 |
| [#40] 新手請教300B PSE Interstage 及output 牛 Rigol 16-bit signal generator.  |
johnnykmtang 會員 70.xxx.xxx.22 |
2025-08-26 14:13 |
