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Epiphone Valve junior

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  • Epiphone Valve junior

    I just bought two of these little guys, and I gotta say they sound pretty darn good. But..... was wondering what I could do to clean one up. Meaning, have no breakup at a cranked level.

  • #2
    Rip the guts out and replace them with the guts of a UL Twin?

    Seriously, how are you going to get a big clean sound with only 3 watts available? I think about all you could do is reduce coupling capacitors to cut the bass and give the illusion of more power.
    "Enzo, I see that you replied parasitic oscillations. Is that a hypothesis? Or is that your amazing metal band I should check out?"

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    • #3
      I knew my options were limited. Ive started replacing the caps already and replaced the 12ax7 with a 12au7. Its better, and I can live with it now. Thanks

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      • #4
        Do you really think a Twin would fit in there? Might be a little cramped. Perhaps if we left out the reverb, that should be a space saver.
        Education is what you're left with after you have forgotten what you have learned.

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        • #5
          If you go over to 18watt.com there is a very long thread about the VJ. It seems to be a favourite topic there. The thread is months old and has over 2K of posts. I can't be bothered since I wasn't there at the beginning and have never heard or seen one of these amps. There go your holidays.

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          • #6
            In order to save your brain, a page twds end in the 18w thread uses this link as a summary of the basic mods: http://forums.birdsandmoons.com/foru...ad.php?t=32385

            hope that helps, Captain.

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            • #7
              Did the 12AU7 really make any difference? I may want to try this!

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              • #8
                Any lower gain pre-amp valve will clean up the signal going into the output tube (but then there goes your typical champy sound)
                Building a better world (one tube amp at a time)

                "I have never had to invoke a formula to fight oscillation in a guitar amp."- Enzo

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                • #9
                  changing preamp tubes are cheap and easy "mods".

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                  • #10
                    I put a 5751 tube in mine. Now I get some overdrive with it cranked. Clean otherwise.

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                    • #11
                      Thanks for the info Ronh, looks like a cheap way for me to play with the sound!
                      Rayme

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                      • #12
                        12AX7 Swaps

                        Research shows I should be able to swap these tubes for the 12AX7 in my Epipy Jr..
                        5751
                        12AU7
                        6681
                        ECC83
                        CV492
                        12AV7
                        12AT7 Any comments???? Thanks, Rayme

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                        • #13
                          Originally posted by Rayme View Post
                          Research shows I should be able to swap these tubes for the 12AX7 in my Epipy Jr..
                          5751.... Very nice.. use one in my vj five watter.

                          12AU7... clean only.. nice for low vol. practice. you'll need pedals.

                          6681.. never tried.
                          ECC83.... stock tube.
                          CV492.. never tried.
                          12AV7.. never tried
                          12AT7 ... 30% less gain than the 12AX7

                          Any comments???? Thanks, Rayme
                          My first 18 watt vj conversion..
                          good platform!

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                          • #14
                            Latest five watt build.

                            He'll run a 12AT7 preamp tube.

                            standby
                            power
                            gain pot
                            gain switch
                            tone
                            volume
                            preamp out
                            power amp in
                            single input, but I often do hi/lo input
                            rear fuse holder
                            marshallized board
                            new OT
                            custom panel

                            gonna use different knobs.. just had these on for the pic

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                            • #15
                              Originally posted by TWANG View Post
                              Latest five watt build.

                              Nice. How do you do the text on the pick guard material?

                              Thanks-

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