有胆的进来!胆味不够浓，换管求指导。
本帖最后由 brubeck 于 2012-3-23 15:02 编辑上月买了部八达 PH-12 单端甲类耳机放大器，用来推mpro，前端音源是欧博R7（R7用的是俄金脚6h30），用R7的胆输出接到PH-12上，PH-12用的是3支曙光6N8P作胆输入，胆放大和胆驱动，后级用的是东芝的K1529场效应管推动。 R7的胆输出接箱子系统出来的是既有素质又水润通透的声音，但接耳放时出来的是明显的晶体管声，欠缺点细腻和松弛，现考虑把3支曙光6N8P换了，百度几天不知道何家的管子是最佳选择，好几千一支的古董管米不动，只能在3支管子千元左右选择。第一次玩胆，求各老烧支招，谢谢。
先搞清什么是胆味。 这机机，用三只6n8p是什么电路，八达国产机还行，有电路上来看看，没有最好拆开看看。 前面接个音调，把频率高端15000Hz以上，低端150Hz以下的切除掉，
然后在输入点沙沙沙的白噪声，再加一点点轻微的50hz嗡嗡声，
至于声源，去弄个素质高一点的FM收音头，不要用CD之类的玩意，
就差不多了。 嫌胆味不够就换6N4，保证耳朵流油 是不是还没褒透哦。另外输出阻抗与耳机匹配不。 电路估计是6N8P共阴放大，另一个管是并管阴极输出！
两个推动管可以考虑用南京试试，但是中间电压放大的 ...
kongchao19 发表于 2012-3-23 16:40 http://bbs.hifidiy.net/images/common/back.gif
兄是说后排2个是推动管用南京,第一排单独的管子是电压放大的要用进口管对吗 ? 嫌胆味不够就换6N4，保证耳朵流油
皋城瑶珄 发表于 2012-3-23 17:53 http://bbs.hifidiy.net/images/common/back.gif'
6N4和6N8p可以互换吗？ 本帖最后由 皋城瑶珄 于 2012-3-24 07:40 编辑
回复 9# brubeck
不能直接互换，6N8P是大八角中U管，6N4是小九角高U管，加个转换座，调整下工作状态，说不定就是你喜欢的音色。 回复 7# xxx-007
阻抗有低阻高阻选择开关，应该不是匹配问题。一个多月里每天开5-8小时，感觉是曙光管的素质基本煲到顶了，煲不出什么名堂了。。。 回复 2# 天狼
那我问你，偏硬偏紧是不是胆味？ 回复 6# 皋城瑶珄
乱讲，请搞清楚乜胆嘎参数先可以代替6N8p 很多机子上面的胆是装饰用的,建议楼主先证实一下是不是真正用到那3个电子管.
然后要看听那方面的音乐多,胆味浓点就选英国的,第一个重要点,后两个其次,便宜点的有美国RCA,天索.. 嫌胆味不够就换6N4，保证耳朵流油
皋城瑶珄 发表于 2012-3-23 17:53 http://bbs.hifidiy.net/images/common/back.gif
6N4代6N8;P 本帖最后由 皋城瑶珄 于 2012-3-24 16:41 编辑
回复 13# 6072
自己不看清楚别乱砸砖
一个是大八角一个是小九角，能代换？或许只有老兄你有胆子直接代换
标题
回复 16# 皋城瑶珄不耻下问 请教可以代换国产6N4的进口型号 把电路和管座都换了，再换6N4就行了。 本帖最后由 maxwelx64 于 2012-3-24 20:19 编辑
上月买了部八达 PH-12 单端甲类耳机放大器，用来推mpro，前端音源是欧博R7（R7用的是俄金脚6h30），用R7的胆 ...
brubeck 发表于 2012-3-23 14:47 http://bbs.hifidiy.net/images/common/back.gif
http://www.head-fi.org/t/266118/review-and-comparison-of-23-home-headphone-amps-add-travagans-red
I caution every Bada owner to wait 24 hours before you remove any tubes. It you remove tubes before the current dissipates your will blow the delicate Toshiba mosfets.
Many seasoned users feel the (vintage NOS) 6SN7 tubes used with the Bada are the best for driving headphones over other tube types.
http://www.head-fi.org/t/134242/bada-ph12-vis-a-vis-meixing-mc66ae-and-lehmann-bc
The sound is fantastically real with two EH Gold 6SN7 tubes in back and one Shugang 6N8P tube in front.
http://www.head-fi.org/t/134242/bada-ph12-vis-a-vis-meixing-mc66ae-and-lehmann-bc/45
The Bada PH12 is not recommended for headphones of low impedance like the Grados.
The tubes supplied are not as good as the old tubes of the 40s and 50s.
Great 6SN7 tubes with the PH12 are:
Sylvania GT VT-231 (GT or GTA also), or CBS GT, or GE GT as the single input tube
and 2 RCA GT VT-231 (or plain GT) as the output tubes.
RCA VT-231 (or GT), CBS GT, or GE GT as the input tube
and 2 Raytheon VT-231 (or GT) as the output tubes.
Raytheon GT VT-231 (or plain GT) as the input tube and 2 Sylvania or RCA VT-231 (or GT) as the output tubes.
Ken Rad VT 231 as a single input with 2 General Electric GTA tubes as output tubes.
Other good input tubes are the Electro Harmonix Gold (particularly with the Raytheon VT -231 or GT as output tubes), the RTT (German) GT or the Zalytron (Holland) GT.
Avoid using GTB - some are bad. GT, or even some GTA, are usually better.
Cautions with using the Bada PH12:
Bada owners have sometimes experienced mosfet failure when they change tubes without letting the unit be powered off for at least 10 minutes before removing a tube. After turning the amp off, residual power in the circuitry can short out a mosfet when a tube is removed. Wait at least 10 minutes (30 is best) before removing any tube after turning the Bada off.
Also never turn the Bada on until it has been off for at least 10 minutes.
And always be sure the headphone is fully seated in the Bada before turning it on. Mosfets are sensitive and easily blown from an internal short situation.
Bada now uses two 15V diodes, joined together with their negative leads where the two positive leads each connect to the outer pins of each mosfet, to help provide mosfet protection, but care in use is still advised.
A good interconnect, like the Acoustic zen silver Reference II, is essential for best performance, as is a good source and headphones. 不要折腾这个八达机子了 。 声音不咂的。
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