Deluxe Reverb Rattle

Discussion in 'Amps/Cabs Tech Corner: Amplifier, Cab & Speakers' started by kldonegan, Jan 7, 2008.

  1. kldonegan

    kldonegan Member

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    So here's the scoop. I put a new speaker in my '66 Deluxe Reverb. Upon tightening everything up, I've got a rattle that is audible THROUGH THE SPEAKER when I crank it and play the lower strings. It sounds different than the amp drive, and stops about a third of the way into the sustain of the chord/note I'm playing. Here's what I've tried so far:

    -Amp into different speaker cabinet with known good speakers. Still get the rattle through the speakers in this cabinet.

    -Taking off pre-amp tube covers. Rattle still there.

    -Holding power tubes/rectifier tubes. Still there.


    It didn't start until after the speaker change. Any suggestions as to where to try next? I can't just live with it, as I track with the amp on a regular basis. Thanks!
     
  2. rooster

    rooster Member

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    You could have..... a rattle in your speaker. What speaker did you put in?

    rooster.
     
  3. 67super

    67super Member

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    Since it seems to be speaker independent I would start the process of elimination.

    1. Try each channel and see if it's common to both.

    2. Start trying different tubes in each position one at a time or remove channel one preamp tube when in channel 2 etc. This will isolate and eliminate whether it's a tube.

    If thit's still there it could be a number of things. I had a similar problem in my 68 DR that turned out to be a weak solder joint.
     
  4. kldonegan

    kldonegan Member

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    Rooster, It's not the speaker. First thing I did was try the amp into another cabinet... From my original post:

    -Amp into different speaker cabinet with known good speakers. Still get the rattle through the speakers in this cabinet.
     
  5. slider313

    slider313 Silver Supporting Member

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    Try a different rectifier tube. Sometimes you can get filiment rattle, which seems to comes through the speaker. If that's not it try replacing one pre amp tube at a time. A pre amp tube can also cause this.
     
  6. kldonegan

    kldonegan Member

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    Thanks 67super/slider. Will try those tubes and see what happens!
     
  7. mbratch

    mbratch Member

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    I had a rattle in a 1965 BFDR that drove me nuts. Finally took the whole thing apart and found that the RFI screen was a little loose on the cab. I applied a few staples to refasten it and the noise was gone.

    And the noise did sound like it came from the speaker.
     
  8. kldonegan

    kldonegan Member

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    Rectifier/Preamp tubes didn't do it. Tried a different speaker cabinet again, with the amp isolated in a different room. Still there...

    Is the RFI screen that chicken wire looking stuff on the top of the cab???
     
  9. slider313

    slider313 Silver Supporting Member

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    Check the solder joints on your cathode bypass caps; 25uf@25v.
     
  10. kldonegan

    kldonegan Member

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    Time for a tech, I do believe...
     
  11. mbratch

    mbratch Member

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    Actually, more like screen door wire, but yes. :)
     

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