6L6's Tube Recs for 210RD-100 Amp?

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Author Message   Frank B. Posted on Sunday, August 10, 2003 - 03:38 am:    I just purchased a MM RD-100 with 2, 10's and wanted to know if anyone had any good tube recommendations? The tubes in it currently are okay but I don't exactly know how old they are and want to see how this baby sings with new tubes. Since this is cathode biased does it matter what type tubes I use as long as they are matched and biased. Will 5881', kt66, etc. work okay? Thanks   michael kaus Posted on Sunday, August 10, 2003 - 09:13 am:    The 100 watt series push the tubes pretty hard. I am assuming yours has 6l6gc's instead of the earlier 6ca7's. I would get the best I could and in this case, that would be either JJ's or Svetlana. I have not tried the EH tubes but they say they are good. I CAN speak for the JJ and Svet tubes. My choice at this time would be the JJ. They seem to be holding up real well in my linear twin and I have been using the E34L's in my 2-10 65 for a couple of years and it gets pushed pretty hard. Mike   Terry Posted on Tuesday, August 12, 2003 - 11:35 pm:    Yes you can use the 5881 or the KT66. I use the 7581A Phillips They are very nice, you can find the on Ebay .   Marc Posted on Tuesday, November 18, 2003 - 03:37 pm:    I've been using the same matched quad of Svetlana 6L6GC's in my HD-210 One*Fifty, for about three years. They're sonically excellent and built as ruggedly as this 1980 MM amp was! I hope the whole "Winged C" switch Svetlana had to make distributio-wise has had NO effect upon thier tubes, because these could not possibly be improved upon.   Tom J. Posted on Thursday, December 04, 2003 - 10:31 pm:    I have a RD-100 amplifier that uses 6L6's and have read different posts regarding tube recommendations. I currently have Svetlana 6L6's installed which replaced Chinese tubes that were in the amplifier when I bought it. Honestly, I can't see much difference in the tone after the replacement. My question is whether or not power tube quality makes much of a difference in the tone quality of hybrid amplifiers. I've read articles that say in the case of all tube (pre and power) amplifiers the preamp tubes are the ones that have the most influence on overall tone, while power tubes only effect the output level. If this is the case, tube quality should not make any difference on the tone for MM amps that don't have use pre-amp tube. Any thoughts on this would be appreciated.