tblake10 Posted May 3, 2014 Share Posted May 3, 2014 Need one for my JM blueberry preamp. The Russian military grade one. Quote Link to comment Share on other sites More sharing options...
Cornman Posted May 4, 2014 Share Posted May 4, 2014 Hey Tim, interesting to see you back with another Blueberry, after selling one to me. Good pre's are not to forget,, your just like me,,, I have to miss something to realize how good it actually was. There are several pieces I have sold that I severally regret. I have your old Blueberry back at Marks for his latest upgrade mode. Good luck with tube search, I willl keep an eye out, By the way does your new one have silver face, & do you have the wood Cabinet? Quote Link to comment Share on other sites More sharing options...
NOSValves Posted May 4, 2014 Share Posted May 4, 2014 Tim, Save your money and use the modern Sovtek or EH gold pin. They are made on the exact same factory line in the exact same way as the military surplus tube. To me and many others they sound identical. If there is a differnce its extremely small... 1 Quote Link to comment Share on other sites More sharing options...
tblake10 Posted May 4, 2014 Author Share Posted May 4, 2014 Corn, the one i have now is black and no wood case. Let us know how you like the upgrade. Craig, appreciate the input. Quote Link to comment Share on other sites More sharing options...
muel Posted May 4, 2014 Share Posted May 4, 2014 You might be interested in this page describing how to tell the difference between the original and the new: Recognizing 6h30 - 6n30 tubes I have a spare or two... shoot me a PM if interested. Quote Link to comment Share on other sites More sharing options...
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