1971 Traynor YBA-1

Discussion in 'Amps and Cabs' started by Paulguitar, Apr 10, 2015.

  1. Paulguitar

    Paulguitar Member

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    Hey guys -

    I recently picked up a 1971 Traynor YBA-1, waiting for it to get shipped to me, but I was sent these pictures! I am wondering, is this amp the same circuit as the 1968 YBA-1 that seems to be the crown jewel? If it isn't, is it still fairly similar to the JTM 45, like the 68?

    Thanks guys!
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  2. fakeox

    fakeox Member

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    That's a '60s model.
     
  3. Sparky6string

    Sparky6string Member

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    Right the 71 would be a bumper variety.
     
  4. OiRogers

    OiRogers Member

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    Shhhh... Don't tell the seller.

    I have a '71 YBA-1 in the stack... It looks much different externally. It still sounds great though.
     
  5. fakeox

    fakeox Member

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    Got a feeling the seller is not on TGP..
     
  6. soldersucker

    soldersucker Member

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    Back to the OP's question this YBA-1 is a late 60's model with a reworked bias section nicely done bias pot added and no other caps replaced.
    The circuit isn't a JTM-45 like the very early Traynors 64-65 but similar to a later Marshall Plexi(But not exactly).
    Traynor moved away from tube rectifiers Filtering is different and a few values tweeked by this point vs Marshall values.
    Nice amp looks like one of the 20 plus i've owned from this era.
     
  7. Paulguitar

    Paulguitar Member

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    Crazy!!! That's awesome that this is one of the late 60's ones, that's what I thought, but wasn't sure!! So it is more similar to a JMP? And what is the wattage on these heads/how do I figure out the exact year?

    Thanks for helping me out guys!!
    -Paul
     
  8. ROKY

    ROKY Member

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    The voicing should still be flatter-mids/JTM-ish rather than a JMP lead spec .

    Check the date codes on the pots - it's most likely a '68 or '69 model .

    Wattage for the YBA-1's of this period is probably a solid 50 watts .
     
  9. Paulguitar

    Paulguitar Member

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    Awesome! Thanks again!! Also, it might be impossible to tell from the pictures, but does it look like the electrolytics and caps are in good condition?


    Thanks again guys!
     
  10. soldersucker

    soldersucker Member

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    Yes it is impossible.
     
  11. LPV

    LPV Member

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    That's a 71'. Mine is exactly the same. They had a few with "transitional" cosmetics. No choke is also a giveaway that its later. The guts look exactly like mine, which look exactly the same as a bumper model with the exception of some resistor values and the tone stack may have a 1000pf treble cap. I've gone nuts on mine and modded the crap out of it. It's an amazing sounding amp. I've been on a selling spree since I bought the traynor. It has cured my GAS for now.
     
  12. OiRogers

    OiRogers Member

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    I'd always been told that the YBA-1s were in the 40 Watt range. They certainly sound much higher though.
    They certainly blow the doors off my Fender Bassman heads of the same era.
     
  13. ROKY

    ROKY Member

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    Whoops ..didn't even notice that the choke was missing ..

    My YSR-1 is '70 model and has the bumper trim cosmetics.
    Had a '71 YBA-1 years back that also had the bumper trim.

    Currently still have a '66 YBA-1 that was converted to SS rect(they silicon gooped the recto socket and grounded the 5v tap)


    I think they're a better value and sound than the BF Bassman heads, too.
    40 watts instead 50 ? Ya might be right about that .. :dunno
     
  14. Sparky6string

    Sparky6string Member

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    I read that they put out 45 watts.

    BTW mine is a bumper variety '71.
     
  15. LPV

    LPV Member

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    Plate voltage will be about 438 so on paper it puts out less than the typical 50 of 2 x el34. In reality its brutally loud. It has a really meaty OT that is very efficient, almost too efficient for guitar. Very different from a marshall. Stock on the left and the replacement Merren on the right.
    [​IMG]
     
  16. Custom50

    Custom50 Member

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    Yeah that is a 60s model. I had a 68 and a 72 YBA-1 at different point and they both sounded incredible in that old school non master volume way. Very old school Marshall/Tweed Bassman. If you bridge the channels and dime the volumes it's the tone of legends.
     
  17. Paulguitar

    Paulguitar Member

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    Good to know!! Thanks!! I will have to get this thing all checked over to find out conclusively what year that it is! I am stoked to know that it is probably late 60's though!! :)
     

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