我跟EUROTUBES定了一些管子~後來他寄給我的3之ECC83S的前級管盒子上有2個寫著HI-GAIN~~另一個寫著USE FOR BALANCE....請問一下我前級管再安裝上有沒有順序或是什麼要注意的事項?因為是撘朋友的順風車...所以那個BOB的回信我並沒有看到...還有..我原本的後級管是EL34..可是他寄來的是6L6GC...不知是寄 糷F還是怎樣...不知這2個型號可以換用嗎?我的音箱是JCM900 2502...
我知道的是寫著 Hi-gain 的 ECC83s 裝在 gain-stages 上 而寫著 Balance 的 ECC83 則是裝在 phase-inverter 位置上 據 Bob 說 high-gain ECC83 have about 10% more gain than standards which adds a bit of bite and a sharper dynamic but does not hurt the clean tone. The other attribute that these tubes have is a faster filament rise time which is great for an EVH, Petrucci or Satrani type style and is also good for fast palm mute styles JCM900 2502 原廠是配 5881s 或 EL34s, 兩種管子是可以互換 不過前提是你要檢查一下 biasing 你要不要寫信給 Bob 問清楚 ? email: eurotubes@cnnw.net 換好管子後, 有空跟大家分享一下感想吧
to tsai.powei: EL34 equal 6L6GC???不知道你是在哪聽到的,6L6,EL34,E34L,KT88這些管因為他們的腳位一樣,都可以互插沒錯,但並不是每台機器都可以這樣搞..... To DM: Bob寄給你6L6GC應該是沒錯,JCM900一般原場是配5881(6L6GC),但保險起見最好還是拿給專業人士調個Bias會比較保險,若你是請Bob配對的USE FOR BALANCE這根應該是用來裝Phase Inverter一般是PowerTube旁邊那根,而另外兩根應該是分別用來裝Input Stage還有Gain Stage
DM: 以下是BOB的寄給我的資訊 For the 900 I think I would go a little higher lie about 114 to 115 in gain for V1 and V2 and then a balanced ECC83S in V3 for the phase inverter. For power a pair of JJ 6L6GC's in a grade #40 另外關於6L6GC... 可能是當初我收到的訊息有錯 我是跟他訂6L6GC沒錯
順道貼 Tone characters between JJ 6L6, EL34, E34L and KT88 power tubes =========================================== The JJ 6L6GC's provide more low end thump and a cleaner high end where an EL34 will have less low end and more mid range. That said, the JJ E34L's are deeper in the low end than any other EL34 type tube and have a very aggressive and punchy tone. Broken down into the most basic terms the 6L6's are more of a traditional Fender type tone where the E34L's are more of a traditional Marshall sound. The JJ KT88's provide more low end thump than the JJ 6L6GC's and are a little more like an E34L in the mids and highs. The 88's have a very aggressive and punchy tone that is FAT. It's kind of like a cross between a huge 6L6 on the bottom and a very big E34L in the mids and highs. - Bob