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Tweed Princeton Flubbing Out On Last 15% of the Volume Control ?

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  • #1

    Tweed Princeton Flubbing Out On Last 15% of the Volume Control ?

    So I built a tweed princeton based on Steve Milberger's design which uses solid state rectification instead of the normal 5y3. The amp sounds great but for the last 15% of the volume control things get really flubby in the bass. Im wondering if anyone here has suggestions for fixing this or explanation as to why this might happen.

    Thanks

    Neill
    Tags: None
  • #2
    Whack another 20uF in parallel with the reservoir cap
    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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    • #3
      The reservoir cap is already 47uf will another 20uf make that big a difference?

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      • #4
        It can't hurt.

        Also try changing the first preamp stage cathode bypass cap from 10uf to 2.2uf.
        "Take two placebos, works twice as well." Enzo

        "Now get off my lawn with your silicooties and boom-chucka speakers and computers masquerading as amplifiers" Justin Thomas

        "If you're not interested in opinions and the experience of others, why even start a thread?
        You can't just expect consent." Helmholtz

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        • #5
          Are you sure this is not a speaker issue? What are you using? Anything else you can try?
          WARNING! Musical Instrument amplifiers contain lethal voltages and can retain them even when unplugged. Refer service to qualified personnel.
          REMEMBER: Everybody knows that smokin' ain't allowed in school !

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