Trayn YBA-1 Whats wrong with the voicing?

Discussion in 'Amps and Cabs' started by vhollund, Jul 4, 2006.

  1. vhollund

    vhollund Member

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    Ive got one im pretty happy with it..
    Had all the dry components updated and a bias pot
    and i had littlle mod done changing the range the amp to tighten it up abit..
    Now im considering if I can get it further , maybe a somthing to the saturaton in the higher eq making it growl more..

    In other words whats the mods you MUST do on this amp for tone and glory?
     
  2. Jon Silberman

    Jon Silberman 10Q Jerry & Dickey Gold Supporting Member

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    This amp is voiced like a tweed Bassman or early Marshall, it gets that type of growl by design. You could try upping the bias on the power tubes and/or a high gain 12AX7 (e.g., a new stock EH) in V1. Those steps have the benefit of being cheap and non-obtrusive.
     
  3. Mark Kane

    Mark Kane Silver Supporting Member

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    YOu might try swapping out some of the pots to more standard values too.
     
  4. Jon Silberman

    Jon Silberman 10Q Jerry & Dickey Gold Supporting Member

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  5. vhollund

    vhollund Member

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    Thanks!
    Yes i tried the EH tube i V1 and it really made a nice change,
    The Later version that my amp is turned out to have 500k Volumepots , standart is 1000k so i left it unchanged.
    The Earlier versions has 4 mg Pots...
     
  6. JDW3

    JDW3 Member

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    You could change your negative feedback resistor from 27K to 47K, or even to 100K, for some real snap.
     
  7. vhollund

    vhollund Member

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    Ok? Ill check it out:eek: ,

    THis mod really got the amp tightend up:

     
  8. vhollund

    vhollund Member

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    Before I run and try it , can you tell what it does to the sound?
    I mean does it make it cleaner or dirtier?

    I heard about how they higher values of negative feedback in highfidelity amp to avoid distortion.
     
  9. vhollund

    vhollund Member

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    Im just going to share some opinions made on the amp

    About preamptubes I got the amp with some different things in it

    I found that a NOS Phillips 12ax7 did a huge voicing difference to
    EH 12ax7 or Sovtecs

    Les presence created in the preampstage i think , anyway I still have to check with some other tubes


    and Then

    On the amp theres this expander with two knobs
    High and Low

    They both work like a high pass filter , or like the tone control on the guitar , rolling out highs or High mids
    But basicly I find them in the way of the good tone so I put them at full.
     
  10. vhollund

    vhollund Member

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    (There are other and better ways to get a "dull" sound imo)
    Then

    I put the treble and bass abit under "2"
    Jumper and and input G jack in chanel 2 and mix to taste

    A little boost (Voodoo1)

    I feel its getting there..
     
  11. Tapp

    Tapp Member

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    Low Expander=Middle control
    High Expander=Presence control

    Cool amps and are basically a plexi/bassman; except for the later "bumper" trim models, but they can be converted and sound great too!

    Tapp
     
  12. vhollund

    vhollund Member

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    Hello Tapp

    Yes , you are right, and what I meant to say is that the knobs doesnt really "expand" as in "add eq", but that they roll off different eq in the same way as the tone control on a guitar.

    Mine is a 74 (later) version
    What do you mean when you say later "bumper trim" models ,
    Can you elaborate more on that difference?

    Vagn
     
  13. tdu

    tdu Member

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    the bumper trim ones have 2 panels on the sides that have a rubber trim on them. It's usually the later 70's models. I had a 75' YGM-3 that had them.

    One cool thing about the bumper trim models of the Traynor amps is the tops pop off easily for doing work on them.
     
  14. vhollund

    vhollund Member

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    Ah ok , yeah mine is a "Bumper".:eek:

    I had some mods done to it , and it sounds really nice for clean chrunch sounds even at very low volume

    Now I think of adding some "fartiness" to it to have a bit old marshall JTM in it
    not sure how to do it yet though
     
  15. vhollund

    vhollund Member

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    found some more info:

     
  16. ES350

    ES350 Member

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    ditto the tone stack changes (.02/.02/250) and the NFB resistor swap (less NFB). A little instability is interesting...
     
  17. vhollund

    vhollund Member

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    Thanks , I dont know much about how to acheive the different caracteristicsn I guess thats on step further.:)
     

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