Build your own amp: use 6x ECC83

Discussion in 'The Workbench' started by StingRay85, Oct 21, 2021.

  1. StingRay85

    StingRay85 Well-Known Member

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    How would you use them?

    - Let's say 1 goes to LTP PI
    - 1 goes to tube buffered FX loop

    Still 8 triodes left.

    Two channels. If you mix them after 1 gain stage, there's 1 ECC83 gone and still 3 to use.

    Or why not blend them after the second stage? That adds one ECC83 and still 2 to use.

    But what if you want separate tone stacks for the channels, driven by cathode follower, and only mix them after the recovery stage???

    We are getting close now.... 6 might not even cut it. It's decided, we need at least 7 ECC83 ;)

    But what would you do if you could go nuts with tubes? I have a Acoustic 330 solid state two channel amp, and the nicest sounds can be obtained by blending the two channels when using a combination of extreme settings. Like complete mid cut and treble and bass maxed out, blended with a more overdriven but flatter EQ response
     
  2. Pete Farrington

    Pete Farrington Well-Known Member

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    An fx loop recovery stage? So separate fx loops for each channel?
     
  3. StingRay85

    StingRay85 Well-Known Member

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    Hmm... No that's too extreme I reckon. Let me think
     
  4. thetragichero

    thetragichero Well-Known Member

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    that's a lot of little bottles unless you're trying to implement a harmonic tremolo or something 12au7s/12bh7s between the phase inverter and output stage may be of some use (check various svt schematics)
    depending on what you've got in the power section
    the more i play and build the more i'm settling on a 'less is more' philosophy
     
  5. _Steve

    _Steve Well-Known Member

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    Maybe a directly-coupled CF/buffer driver for the power tubes.

    I've been wanting to try one for a while..
     
  6. StingRay85

    StingRay85 Well-Known Member

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    Do you have a schematic for that?
     
  7. ibmorjamn

    ibmorjamn Well-Known Member

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    Would you be able to use 2 tubes as a power section? I ask and I kind of know , to much gain for power tubes. Makes me wonder ?
     
  8. StingRay85

    StingRay85 Well-Known Member

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    For power I have 4x EL34.
     
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  9. Dogs of Doom

    Dogs of Doom >>> Moderator <<< Staff Member

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  10. Matthews Guitars

    Matthews Guitars Well-Known Member

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    Lots of Fender amps have six preamp tubes with reverb and tremolo.

    Or you could go with a four gain stage lead channel like in a Mesa Mark IIC+.
     
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  11. _Steve

    _Steve Well-Known Member

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    The most famous is the Ampeg SVT with 12BH7s, but im pretty sure you can also do it with 12AU7s. I think HiFi guys use them..

    svt6146b.gif
     
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  12. XTRXTR

    XTRXTR Well-Known Member

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    You could try to build a Chorus using a bunch of triodes...no IC or transistors. That might be cool to try actually.
     
  13. StingRay85

    StingRay85 Well-Known Member

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    Cool. I have a pair of 12BH7 in my stash so worth a try
     
  14. fitz288

    fitz288 Well-Known Yinzer Silver Supporting Member

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    6100 has 6 preamp tubes + PI.
    High gain channel uses 4 of them.
     
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  15. Pete Farrington

    Pete Farrington Well-Known Member

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    Yes, a series of DCCFs in cascade, that makes short work of utilising all those valves!
     
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  16. StingRay85

    StingRay85 Well-Known Member

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    6100 is a respectabele amp isn't it?
     
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  17. Pete Farrington

    Pete Farrington Well-Known Member

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    Certainly, a friend had one for a while, so I got to know it fairly well, thankfully didn’t have to fix anything though. He eventually traded it for a Mesa MKIV for more of a fusion thing, but it was a sideways move, rather than an upgrade.
     
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  18. fitz288

    fitz288 Well-Known Yinzer Silver Supporting Member

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    I love my 6101, but not everyone feels the same way.
    Gut shot looks like a computer, not sure how it translates to a home build.
    1-dmhfn81bsodxzjsggxmo-2.jpg
    Have you looked at some of @NewReligion 's gain mods to a classic circuit?
     
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  19. StingRay85

    StingRay85 Well-Known Member

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    No I havent. But the concepts to increase overdrive are more or less clear to me
     
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  20. NewReligion

    NewReligion Well-Known Member VIP Member

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    Reverse engineer the preamp (dirty side if multi channel) draw it out. Then apply what you know or experiment. Tone Stacks are fun too.

    Good luck.

    David Hopkins a.k.a. @NewReligion
     
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