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The Stupid Idea Vol 3: "Stupid Gets Real"

Discussion in 'Amp Input - Normal or Bright' started by GunMonkeyINTL, Dec 19, 2017.

  1. GunMonkeyINTL

    GunMonkeyINTL Senior Stratmaster

    Feb 5, 2015
    In light of this, and the one stock bias value I could find online, I decided to go back to the 170r / 14.8w / 39.9mA bias in the SS recitier “channel”.

    12w seems to be the accepted limits of a cathode-biased el84, Friedman appears to have designed the amp around 16-17w.

    With this arrangement, I’ll have a pretty standard 12w when tube-rectified, and hot-like-intended 15w when SS-rectified. Two different sand boxes to play in...and I reckon I’ll develop some real-world experience with tube wear and limits :).

    I’m cleaning up my work area, and took one last shot before some stuff when in the trash:


    Happy New Year, and Thanks, again, for all your help and insight!
    Bodean and Robins like this.

  2. GunMonkeyINTL

    GunMonkeyINTL Senior Stratmaster

    Feb 5, 2015
    And like any good modern serial, a preview from Vol. 4


    Since I didn’t have a bunch of troubleshooting like I thought, I ended up with extra time left over, and got the case and cab husks together.

    Still have a bunch of work to do, and am having trouble figuring out hardware for the look I want, but I wasn’t expecting to even have this much done by the time I had to go back to work.
    T Bone Slort and Robins like this.

  3. Robins

    Robins Dr. von Loudster Strat-Talk Supporter

    Dec 22, 2010
    Happy New Year and enjoy your Fish Taco.
    It is a keeper, for sure.

    Play loud,
    GunMonkeyINTL likes this.

  4. Axandre

    Axandre New Member!

    Apr 19, 2018
    São Paulo
    Hello dude, I’m from Brazil and I have problem with my pt-20. So, how many ohms have the resistor “r11”?
    Last edited: Apr 19, 2018

  5. GunMonkeyINTL

    GunMonkeyINTL Senior Stratmaster

    Feb 5, 2015
    The one in mine is 470r.
    Are you trying to build one, or do you have a real one?
    What’s the problem? That doesn’t seem like a component that would be likely to fail.

  6. The Ballzz

    The Ballzz Senior Stratmaster

    Feb 26, 2014
    If that's your first build (or even fifth or sixth) fantastic job and very nice work!
    Good On You Bro!

  7. dalezjc

    dalezjc Strat-Talk Member

    Jun 16, 2017
    Colorado Springs, CO
    Amazing build!