1964 White Knob Princeton

Discussion in 'Amps and Cabs' started by hotpaul, Apr 28, 2015.

  1. hotpaul

    hotpaul Supporting Member

    Messages:
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    Sep 26, 2008
    About 6 moths ago I picked up a nice 1964 White Knob Princeton that came with GT 6v6s and some old looking non-name preamp tubes. I figured that I would give myself a bit of time with the amp before changing anything.

    I like the current sound, but I'd like to experiment with replacing the tubes in order to get some additional warmth and earlier breakup.

    Any suggestions from other Princeton users?
     
  2. drbob1

    drbob1 Silver Supporting Member

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    21,953
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    Aug 9, 2004
    You should show pics of the "no name" 12AX7s over on the tech thread, find out what they really are.

    It's a simple circuit, so it should respond to different tubes by sounding different, whether that's better or not is up to your ears. First, I'd check the bias and make sure it's right before changing anything else-that amp should be sweet and break up nicely right out the box...

    Being a fairly low gain preamp, a nice RCA or Sylvania backplate in V1 and something like a Phillips EKG or GE in V2 should sound great. Then RCA, Sylvania, Mazda, Visseau or maybe Briar 6V6s, and any NOS 5Y3.
     

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