换胆初感记 [复制链接]

RCA 5692 6SN7
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2222733508&category=7275#ebayphotohosting
[upload=jpg]uploadImages/200427215590054.jpg[/upload]
比较恐怖！！！！！！！！！
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=3076410994&category=50598
再看这个：
http://www.tubeseller.com/catalog/i9.html

我现在的6SN7：稀罕物呀！
6SN7GTA / GTB:
This is the later improved version, and the improvements were primarily geared toward the TV chassis designers who demanded more max. plate wattage and voltage, where vertical circuits can put up to 1500 volt pulses at 7 watts on the plates. For hi-fi audio use, these improvements are meaningless. These are fine tubes, nonetheless. Most are found in the short glass envelope, but some brands like Raytheon used the Tall Boy style. Sylvania made tubes have the triangular plates mounted lower, and set at angles to each other, although some of the very earliest examples of the GTA types still used the dull blackplates facing each other. RCA used the flat black plates "sideways" to each other, and GE used the grey plates parallel to each other. The Sylvania types in demand have a large top getter patch. The earliest Sylvania GTA types have a green label and heavy top getter flashing extending down the sides of the tube. The early GTB types are similar, but have a yellow or red label. The versions from the 1960s have the getter just covering the top of the tube. All of these have the same black triangular plates and are excellent tubes. The GE types have a side getter and large parallel grey plates, and the RCA used both bottom or side getter. Most other vintage USA brands you find will have been made by these three vendors, and will be one of the above variations, regardless of brand on the label. A few were made with brown micanol bases, the RCA types being very dark brown, the GE types being a lighter, marbled brown. Many audiophiles prefer either the Sylvania chrome tops, the RCA, or the GE side getter over any others, even over the military or redbase types. These are all a great bargain now, and are sure to be rare and expensive tomorrow.

FEVER兄，MULLARD CV 181 的资料昨晚上查了两小时，竟然没查到，您有它的资料吗？或请给个链接。
上面我的帖子的英语看起来费劲，请有兴趣的DX给翻译翻译，谢谢！
经过仔细聆听，发现：高频略有点驻波，声场比较深的地方的高频有点毛刺感。高频稍微有一点点过，低频控制力差一丁点儿，中频厚度也差一丁点（表现在播交响乐时气势略欠），与6SN7、6SL7无关？环境问题？
听音室情况FEVER兄如果有兴趣也请帮我参谋参谋，听音情况详见
http://www.hifi168.com/Bbs/article.asp?titleid=44967&ntypeid=10
系统配置详见：
http://www.hifi168.com/Bbs/article.asp?titleid=37598&ntypeid=10

谢谢FEVER兄指点并纠正了我的一个常识性错误认识！
JS WIWI 的網站我早就找了，没有MULLARD CV 181 ，香港有的店有，有的店没有，朋友帮问过了。MULLARD CV 181 价格应为多少？不会太贵吧，我查了5692，竟然有价格在300多美金一只。

听了2小时，没听见“嚓嚓”声了。
总体感觉声音基本平衡了，低频控制力度明显好了，甚至可以播点钢琴，但低频很强的曲子还是控制不住，估计与所换的胆无关，播TUTTI“火鸟”仍然上不去，声音发破，估计也与所换胆无关。一般情况下表现还过得去，动态很大时还是收拾不住。音量较大是略有点吵。
音色上还是不如曙光管的中频，曙光管的中频味道听着很舒服，就是低频控制太差。
换上的胆再煲煲可能有更好表现。

有没有中频味道如曙光管而且低频控制比 SYLVANIA 还好的6SL7、6SN7呢？

好的，感谢FEVER兄深夜回答我的问题，先搞一对CV181听听。
以后不再用TUTTI 中 FIREBIRD 來考機了，音量在10点以下还是可以正常听。

刚才，一帮朋友来我处理发烧，一致得出一个结论：别在折腾你的器材了。
但我对它的中频还不够满意，低频控制力度还欠那么一点。
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圖片由各位同學如 WYFSH, ERICFDAI ，KICK ，FISHERMAN ，彌勒 等同學四出張羅提供，如何？
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同意。
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如能找到 MULLARD CV 181 便不需要找 RCA 5692 了，但一定要弄清楚 CV 181 是否在你的璣上可以直代 6SN7。
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谢谢！MULLARD CV 181 香港能找到吗？我朋友近期去香港。我已经提醒他注意能否替代，他对胆也比较了解。如果找不到才用RCA 5692。

现在“嚓嚓”的噪音少了，偶尔能听到点，用了约20小时，还需要观察吗？

6SN7GTB Sylvania 1940 The original Chrome tops.  (what's that?) From Bulk pack.  These come from a music store, and were spare parts for organs. Untouched for 50 years...and Mint quality.  Look like new and test simply perfect. Are send in matched pairs. NOS,price:45u$,-




http://www.jacmusic.com/nos/6SN7.htm

fever 在 2004-2-3 1:26:23 发表的内容 一只6SL7老发出“嚓嚓”的声音，随开机时间发声频率变小最后消失，开机继电器开始工作时发出“嚓”的一声，请问是否正常？

kick  兄，試把有“嚓嚓”聲的胆換到另一邊去，如“嚓嚓”聲跟着胆走到另一聲道，便要找 JS  理論，如是網上 BID  來的，便要發 E-MAIL  給賣家商量退貨。[/quote]

换另一边一样，现在“嚓嚓”声减少了，偶尔还有，需要继续观察吗？
换成原来的管没有这个问题，但低频控制不行，换上的胆我觉得低频更真实。

6SN7没查到价格，6SL7为110美金/对。