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RE: Music Reference RM9mkII Driver Tubes

Put the old tubes back in and try again. Despite the mystique of NOS tubes, your chances of getting crap are pretty high. Even if they were tested on a tube tester, once in circuit, with the higher voltages and currents a lot of tubes don't run properly.
If it runs with the old tubes, you've bought some clunkers. Also make sure they are the right tubes.

Dan Santoni

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