Blues jr given me da Blues

Discussion in 'Amp Central Station' started by east boston guy, Aug 1, 2020.

  1. east boston guy

    east boston guy TDPRI Member

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    I just took my blues jr. Out of storage. After plugging it in it popped a power tube. It might have been handled rough in transit. I checked out electronics, everything looked pristine. I installed 2 gold lion power tubes. Let them heat up well and played. Clean sounds great but amp rattles at breakup. Especially on g string. This amp never was used much in past. Not even broken in. Any advice on where to start troubleshooting would be appreciated. Only rattles after 3 on master dial and 2 on volume. Fat switch makes it worse. Sounds like a blown speaker. but I tested it with another amp and its fine. I ordered a set of pre amp tubes. Hopping thats the problem. Thanks.
     
  2. Wally

    Wally Telefied Ad Free Member

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    Tap test on the tubes?? The lack of the ‘rattle’ while running another amp through the speaker indicates this is not a cabinet rattle but is somewhere in a tube...at least that is my guess from here.
     
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  3. Wally

    Wally Telefied Ad Free Member

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    And...welcome to the forums.
     
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  4. east boston guy

    east boston guy TDPRI Member

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    Thanks for advice and welcoming.
     
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  5. Geo

    Geo Friend of Leo's

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    The tube sockets on the BJ can be very tight. I installed new power tubes recent and when
    thought completely seated in the sockets were not. Had to carefully push further in until finally
    flush with the socket.
     
  6. studio1087

    studio1087 Telefied Silver Supporter

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    Tap gently with a guitar pick. The plastic pick is a good insulator. Be careful!
     
  7. east boston guy

    east boston guy TDPRI Member

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    Thanks for replying. I solved the problem yesterday. One preamp tube wasn't as bright at the bottom as the other 2. I changed it and the problem left town...Yipeeeeeee.
     
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