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Krank rev pro jr tube config?

Discussion in 'Other Amps' started by Daniel55, Jul 19, 2021.

  1. Daniel55

    Daniel55 New Member

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    Picked up a rev pro jr 20 watt. I'm looking to see which tube does what as far as the 4 - 12ax7's go. Is there a way to figure it out? I've done countless searches online for just that information and nothing. Unless I'm using the wrong search criteria... 1 tube should be for the effects loop, and 1 for the phase inverter and 2 for the preamp section. Any thoughts?
     
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  2. pedecamp

    pedecamp Well-Known Member

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    Congrats on the new amp! How does it sound? You have pictures of the current tube layout?
     
  3. Gene Ballzz

    Gene Ballzz Well-Known Member

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    I have never heard of that model? Pics or an accurate model name might help us help you?
    Just Sayin'
    Gene
     
  4. RLW59

    RLW59 Well-Known Member

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  5. Daniel55

    Daniel55 New Member

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    Yes I can get a few pics after work. Thank you on the congrats! Sounds pretty good! There is a hum I'm trying to remedy, but other than that it has a pretty chewy, chunky driven channel. I really like collecting these small wattage tube amps.
     
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  6. Gene Ballzz

    Gene Ballzz Well-Known Member

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    No pics needed, thanks to the link shared by @RLW59 ! :D In the first post, I thought you were using confused references to a Fender Pro Jr. "'It is all clear to me now' said the blind carpenter, as he picked up his hammer and saw!" :p
    Carry On,
    Gene
     
  7. pedecamp

    pedecamp Well-Known Member

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    Does it hum in both channels? Does it hum with the volume turned off? Does it hum if you plug your guitar into the effects loop return? Its probably a bad tube somewhere, just a matter of isolating which tube. or if you have the cash replace them all.
     
  8. Deftone

    Deftone Well-Known Member

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    I had one. I think I still have the schematic at home. I'll try to remember to look for it and scan it when I get home.
     

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