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VERY basic SFPR tube question

6/6/1999 12:28 AM
VERY basic SFPR tube question
My ´68-´69 Princeton Reverb has RCA´s in the preamp stage and RSD 6V6GT´s. Any need for "upgrading"? Not that there´s a problem: the amp sounds great. Being a total non-tech, I´m just curious. Never heard of the RSD brand either. What is it? They are black-shielded inside the glass. Grateful for any reply.  
Had my local tech change electrolytes and doing the common PI mod.  
- Dyna
6/6/1999 6:47 AM
MJ Harnish
My advice here: If it ain't broke, don't fix it. There's no point in buying new tubes if it sound great already.  
As for the RSD, Ned can probably enlighten us, but from the description they sound like every other 6V6 I've ever seen.  
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