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Thread: New build: Supro 1624T in a Marshall Lead 12 donor amp

  1. #36
    Member klooon's Avatar
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    Quote Originally Posted by Enzo View Post
    What else is there to play with? The speaker. The speaker is THE one thing with the most effect on your sound. Maybe you;d like a brighter speaker.

    Remember when reading reviews: to one guy a speaker might be shrill, but to another it is bright and defined. Then a different speaker to one guy is smooth and mellow, but to another guy it is dull and edgeless. Read between the lines.
    Fully agree with that. I went from an Emi Ramrod to this Weber 10A125, which I found too bright (even fizzy) in the micro Bassman amp, but in this amp it is not too bright at all. Usually I find the (Weber) alnicos not edgy enough, too 'nice' sounding - especially in a band setting where it needs to cut through a bit more, like my 12A150 in my Tweed Tremolux, but at home absolutely wonderful though. But in the Supro it is absolutely fine!

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  2. #37
    Member klooon's Avatar
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    Quote Originally Posted by mozz View Post
    Maybe someone can explain the 500pf on the grids of each preamp tube? Maybe that is taking some high freq to ground?
    I don't see these 500pF on the grids... you're referring to the 5nF (5000pF)? These form a RC high pass filter with the 100k, I believe... But there are a lot of 500pF around... not sure what they all do... And of all the values in brackets in the schematic which ones are giving the most high end response?
    Click image for larger version. 

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    Last edited by klooon; 05-02-2017 at 06:25 PM.

  3. #38
    Supporting Member mozz's Avatar
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    Input tube grids.

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