Tubes for BJ

Discussion in 'Amp Central Station' started by exnavyabfc, Dec 3, 2018.

  1. exnavyabfc

    exnavyabfc NEW MEMBER!

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    I just bought a older (?) BJ with a Cannabis Rex in it. I play my 72 Reissue Thinline Tele mostly and some Strats. I try to play the Blues just for fun. The amp seems to be ok and plays well, but it was acting funny, little hiss or crackle so I did the tap on the tubes test. The one all the way on the right (looking in back) glows a lot redder and when tapped on does not sound like the rest. More hollow thud than ring. So I'm gonna replace all tubes. What do you guys suggest?
     
  2. swany

    swany Tele-Meister

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    In my blues Jr. I prefer the mullard 12ax7 . I feel it warms it up a bit.
     
  3. SixStringSlinger

    SixStringSlinger Friend of Leo's Silver Supporter

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    I like tubes as much as the next guy but that's asking too much.
     
  4. LeicaBoss

    LeicaBoss Tele-Holic

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    Depends. New Old Stock RCAs? Maybe...

    If you're going to do it to replacement go to the Tube Amp Doctor. Get a select matched pair for the output section. Live a happy life.
     
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  5. LuthRavin

    LuthRavin Tele-Meister Ad Free Member

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    When I bought mine used it still had the stock tubes in it.. so like my Vox AC10 i ordered new tubes for it..Mullard's in my AC10 they worked like a charm..in my Blues Jr it sounded harsher..so I pulled them out and reserted to stock ones..sounded better..so I left them in. I might try them again at some point but I'm pleased at this present time..
     
  6. corliss1

    corliss1 Friend of Leo's Platinum Supporter

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    The amount of glowiness (highly technical term, I know :D ) has nothing to do with the functionality of a tube.

    You should want as little sound as possible when you tap a tube to perform that test. I'd much prefer the thud than the ring from your description.

    Crackling could certainly be from tubes, but it could be any number of other things as well, such as bad solder joints (a known issue in Hot Rod series amps) or resistors. You could swap tubes and still end up with the same issue, which would mean it's tech time for that amp.
     
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  7. Chiogtr4x

    Chiogtr4x Poster Extraordinaire

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    I run JJ EL-84's now ( have also used EHX- branded Sovteks too) in power section, and low noise ( EHX, TAD, or Tung-Sol) 12AX7's throughout 18 years with a 2000 BJ
    - ALL sound very good, and last very long time- BUT I do have a good tech ( who installed a bias pot) when tubes sound flat/ lacking dimension, or if something's making noise
    But all good for 2-3 years since last ' checkup' - routine gigging...
     
  8. KC

    KC Friend of Leo's

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    or you could just meander over to eurotubes, tell bob whether you want early breakup or max power, drop a new set of JJs in the amp and you're off to the races. I've had good luck with this route
     
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  9. Bartholomew3

    Bartholomew3 Friend of Leo's

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    Nobody else got it ?
     
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  10. bblumentritt

    bblumentritt Tele-Afflicted Platinum Supporter

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    For V-1 I often like the Mullard New Production 12AX7.
     
  11. MrCairo46

    MrCairo46 Friend of Leo's

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    I needed a good laugh at work today.
     
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  12. teletimetx

    teletimetx Doctor of Teleocity

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    ...post no 4 got it, as well...

    anyway, one premise I work from is that there's always tons of info out there that can be helpful or just interesting to learn.

    there's a fella who spent quite a bit of time with the Blue Junior, in all of its iterations and you could learn a few things, just browsing around. Here's a link:

    http://billmaudio.com/wp/

    In any event, an "old" Blues Junior might actually be in the age range where the filter caps might ought to be replaced and finding a good amp tech is always a good thing. There's many DIY folks here that do their own work, and there are some cracking good amp techs here as well, but if your not looking at this like a deep dive into to amp tech, then taking that old Blues Junior into a tech for a good once over will be another learning experience.

    You are apparently somewhere in North Carolina, and you might ask around for some recommendations.

    ...and JJ tubes work fine. Probably a good starting reference point; no need to buy the farm just yet.
     
  13. RLee77

    RLee77 Friend of Leo's

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    :lol::lol::lol:

    A quick handshake and a fair price is as far as I'm willing to go!
     
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  14. Marc Morfei

    Marc Morfei Tele-Afflicted

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    I used JJs in mine and they sounded fine. I had a CRex speaker in mine, too.
     
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  15. Andy B

    Andy B Friend of Leo's Silver Supporter

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    My favorite tubes for a Blues Jr. are: V1 TungSol RI 12AX7, V2 Sovtek 5751, V3 Sovtek 12AX7LPS, V4 & V5 Sovtek or Electro Harmonix EL84.
     
  16. zombiwoof

    zombiwoof Tele-Afflicted

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    Is he asking for a straight trade?. ;)
     
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  17. gitapik

    gitapik Tele-Holic Silver Supporter

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    That's your preamp tube. The hollow sound when you tap it (with a pencil eraser?) usually means it's either shot or on it's way out. I don't think you need to buy a full new set if it's just that one tube.

    I like the JJs 12AX7 for a clean sound base. Follows the controls well when you dial in the dirt. Price is right, too.

    Got a bunch on this page. I like their model, too (preferred series).

    https://www.thetubestore.com/preamp-tubes/12ax7-ecc83-tube-types
     
  18. exnavyabfc

    exnavyabfc NEW MEMBER!

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    Thank you all for your advice,,and I may trade if you are as hot as they are......:)
     
  19. Paul in Colorado

    Paul in Colorado Telefied Ad Free Member

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    Yeah, my inner adolescent thought the same thing. ;-)
     
  20. Billnchristy

    Billnchristy Tele-Afflicted

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    I’ve got some to trade. :lol:
     
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