Preamp in Cable

Discussion in 'Pickups & Electronics [BG]' started by nashvillebill, Oct 20, 2005.

  1. That's right, I found a Web site with a clever concept: a simple preamp stuck inside the instrument cable end--and powered by phantom power. So one end of the cable (the preamp end) had a 1/4 inch plug to go into a bass or guitar, the other end had an XLR connector to go into a mixer. So there probably wasn't much gain, but useful as a buffer to go low-Z.

    I may have to make one this weekend, it's a simple circuit with a J201 FET and three resistors. The hard part is fitting it into the barrel of the 1/4 inch plug....
  2. A9X


    Dec 27, 2003
    Sinny, Oztraya
    That's the main limitation (mongrel of a job) as well as potential reliability issues and reduced options for adjusting the parameters of the circuit. I'd rather build something into a small box and clip that to my strap or belt. Some of my basses have 'phantom' power from my Alembic power supply and others using different onboard circuits, from my (rack) preamp.
  3. SuperDuck


    Sep 26, 2000
    Well, what's the website?! ;)
  4. SuperDuck


    Sep 26, 2000
    Nice! I hope that guy gets his patent issuses worked out...
  5. Unchain

    Unchain I've seen footage.

    Jun 20, 2005
    Tucson, AZ
    I might build one this weekend. Looks like a cool little project.