Quote:
Originally Posted by Seannnn
 hey everyone ... yes i am new to the forum.....it's retubing time for me and i am wondering....i have the DSL 100 JCM 2000.....if i order new preamp tubes will the people know to send me the inverted phase preamp tube with the order or does it matter...are they all the same anyway.....i already know that i want the GTAX7M from Groove Tube......can someone help......hope i don't seem too new to the forum...lol |
Welcome to the forum Sean! Without sounding like an arse, I have to say that I am not much of a fan of Groove Tubes. This is because they take other tubes and "rebrand" them as Groove Tubes. GT is not a manufacturer of vacuum tubes, so it buys all of their tubes, usually from Russia. You can go to the Tube Store online and see what they say about Groove Tubes, Ruby and Fender tubes. They are all relabled tubes.
What does this mean to you? Well, you can get the same tubes for less money by just buying Sovtek, Svetlana or JJ/Tesla. Now GT does have a few tubes "made to their specifications," but I doubt if they are jaw droppers. They probably sound just like a Sovtek 12AX7W-LPS.
Take some time and go to the Tube Depot and the Tube Store for comments on a variety of 12AX7 tubes. A real "sleeper" is the Electro-Harmonix 12AX7 (EH-12AX7) currently on sale at the Tube Store for $11.95 each. It has a fantastic write up and works solidly in all four positions. My next pick would be the Tung-Sol's and then the Sovtek-LPS. I have four of the EH's and I am currently using them in an all tube Hi Fi amp with great success.
I'm just passing this info on to you and you can take it however you want to. I just didn't want you to think GT's were something special.
As far as the phase inverter (V4) goes, I was taught that it needs to be balanced, but now research shows this isn't the case. "However," if you feel you want a balanced tube in that position, you can sure order one and go that route.
Marty