Buying EL84's for Budda Superdrive 30

Discussion in 'Amps and Cabs' started by The Whale, Dec 22, 2009.


  1. The Whale

    The Whale Supporting Member

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    Hey All,

    I recently blew a power tube in a newly acquired SD30i. I'm not sure how long those power tubes have been in the amp, or how frequently the previous owner changed them out, so i thought to replace all 4. Budda recommends Groove Tubes in their literature. What should i look for in an EL84? I don't know anything about tube ratings and what the numbered scale means. Should I replace all four at the same time, or just the one? Fill me in on things i should know about EL84's, brands and their respective ratings.

    mike
     
  2. small axe

    small axe Member

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    i would replace all four and make sure they are matched.....if you want good tubes i would check out kcanos tubes online....they know a lot
     
  3. StompBoxBlues

    StompBoxBlues Member

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    Yeah, you should definitely replace all four, and I think even though it is "self-biasing" or not needing bias, I still would get 4 matched tubes.

    If I were you, I would talk to I think it is Bob at Eurotubes, or any of the other (Tube Amp Doctor is another) tube specialists and ask them...
    Also, if I were you, since you have them on the phone, would ask about the preamp tubes and just get a set at the same time. Even if yours sound great now, it's nice to have backups.
     
  4. Andre357

    Andre357 Member

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    Make sure you get the El84 S tubes. The amp was built around these.

    The more available " El 84 R or " JJ " sounds thinner in the amp and the amp has less body.

    The El 84 S has a physically larger bottle and fits snuggly in the tube sockets the smaller R or JJ will wiggle around.....

    You can use the r's but definitely less low end and you lose of that famous organic budda tone.

    Groove tubes S tubes are just relabeled sovteks, but that's the brand I use, MF has em on line

    EDIT PS - Do not buy the s " high ( 8-10 ) " tubes fron Musicians Friend ! They mislabeled them in their warhouse and no matter how many times you send them back or try to explain you'll keep geting R's, the smaller bottle EL 84 !

    The mediums ( 4- 7 ) are labeled correctly and you will receive the appropriate S tube....
     
  5. VanR

    VanR Senior Member

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    Those Groove Tube EL84S are JJ's. The S is for Slovakia. Or they were the last time I bought them.
     
  6. spyeman

    spyeman Supporting Member

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    You will certainly not do yourself wrong by calling Bob at Eurotubes (or any of the other great folks listed, but Bob does JJ's only and is a buck or so cheaper) and ordering a matched quad of JJ EL84's, they are fine tubes, sound great, and you can drive yourself giddy looking around and listening to all the advice, like this advice, lol
     
  7. Terry Hayes

    Terry Hayes Member

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    I believe you are correct for the Groove Tubes 6L6S. However, Andre is correct that the Groove Tubes EL84S are Sovteks.

    I have tried various tubes in my Budda SD18 and I always think the factory recommended tubes sound best.
     
  8. Terry Hayes

    Terry Hayes Member

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    This is good advice. As I mentioned in my other post, I always find that the factory-recommended tubes sound the best with the Buddas.
     

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