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Blues Deluxe RI - No sound

Discussion in 'Amp Tech Center' started by choosebronze, Aug 16, 2018.

  1. choosebronze

    choosebronze TDPRI Member Ad Free Member

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    I've had a BDRI for about 7 years and played it with no problems. I had JJ tubes installed the whole time. Last week I decided to sell it, so I took out the JJ's and reloaded the original GT's, which were boxed the whole time. I never even thought to fire it up.

    Tonight I realized I should test the amp out before listing it for sale - and no sound. Connected the speaker to another amp & it works, so I know the speaker's ok. Pulled the GT's out and put back in the JJ's I'd been using - still no sound. Took the back cover of the amp off, I don't see anything that looks unusual. There's an odor. I wouldn't say I'd call it burning, but it's enough that I noticed it. I can't pin down exactly what it smells like, other than it smells electrical.

    I could see V1, V2, V4, and V5 faintly glowing. But V3 wasn't. I touched it and it was ice cold. I tried every 12ax7 I have in that spot and the same thing. I tried swapping out V1 and V2 just in case, same thing. So it seems like something around V3 is the problem.

    With the back off, and standby off, I hear a hum from the board, but that's the only noise the amp will make.

    I know just enough to get myself in trouble, so I'm not sure where to go next. I downloaded the BDRI schematic. Should I test the voltages @ V3 pins 1, 6, and 8 to see if they match the schem? Is there something much simpler I'm missing? All the solder joints look good on the board. I don't see any brown spots, or any electrolytic caps bulging or anything. I don't know how changing the tubes caused such a problem. The amp hasn't been touched otherwise, for months.

    Thanks for any help.
     
  2. choosebronze

    choosebronze TDPRI Member Ad Free Member

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    [ removed ]
     
  3. wanderin kind

    wanderin kind Tele-Meister

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    probably something to do with the tube sockets, re-tension with a dental pick or take a small screw driver and grind it into submission.
     
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  4. choosebronze

    choosebronze TDPRI Member Ad Free Member

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    Spot on. That fixed it. Thank you!
     
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