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RE: Changing Preamp Tubes?

hm.... i can only speak for my magnum. it can take from EL34 over KT77 any tube up to KT120 and of course 6550/KT88/KT90. bias for EL34 may be 30 mA only! even the stronger types take not more than 35 mA. (they would not sound better at 40 or 45 mA)

my logic says that this amp design can only work perfectly with one tube type and not match with all the others. nevertheless it sounds great with each type (exept my quad KT120)- very funny...

N.


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