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Help with harp mods on my project amp

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  • Help with harp mods on my project amp

    Thanks to Steve for this schematic. It looks like we have a winner.
    http://music-electronics-forum.com/a...-schematic.pdf

    As you can see this is a 2x6L6 with 2x12au7 and a 12ax7 PI.

    This amp has lots of potential but my tech is a guitar guy and we need some help to unlock said potential. He's already changed a resistor on the treble control which added more sweep and improved things a bit. I've installed a Weber 15F150 already. The amp is loud but sounds a little sterile or stiff to me...so hard to describe these things. I'd like it to be more "horn-like".

    I'd love your suggestions to share with my tech!

    Thanks,
    Jay

  • #2
    For some reason I can't even see the schematic so I can't comment.
    Bruce

    Mission Amps
    Denver, CO. 80022
    www.missionamps.com
    303-955-2412

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    • #3
      Univox schemo...Harp mods?

      Sorry for the bad link! Try this one.

      http://music-electronics-forum.com/a...-schematic.pdf

      I'm also interested in starting target for power tube bias.

      Thanks,
      Jay
      Last edited by JMT; 06-08-2010, 01:26 AM.

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