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Kerry

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Posts posted by Kerry

  9. DIY mini T2 Build Thread

    in Do It Yourself

    Posted

    I don't have a scaled down T2 PSU.  The one I use is based on the original T2 PSU schematic.

    I am working on a golden reference version, but that project is not completed.

    Once upon a time, I did a golden reference version, but it was too fragile.  In my new project, I will add current limiters in front of the regulators, like Kevin did in the T2 PSU.

    • Like 2

  14. The ultimate DIY? A Stax SRM-T2!

    in Do It Yourself

    Posted

    On 7/12/2021 at 6:57 AM, JoaMat said:

    Thanks Kerry, for internal picture of and info about your T2. It’s always very inspiring see your work.

    I assume the four small boards, one at each big tube, are CCS for the two LEDs on main board at respective output CCS. They must differ (schematically) from the original design, mustn’t they?  Do you mind tell us what the small boards look like?

    Yes.  It's the CCS for the LEDs that feed the the output CCS.  It's a simple cascaded DMOS with a cap on board.

    1271691901_20210713_185305127_iOS(2).thumb.jpg.bb34d1e268d6e68b7498e4c1ad3fb786.jpg

  15. The ultimate DIY? A Stax SRM-T2!

    in Do It Yourself

    Posted

    19 hours ago, starcat said:

    Are you using all original transistors or modified boards with substitutes? 
    Digital attenuator or analog pot in there? 

    I've redesigned my own boards and using the RK50 typically.

    1339659113_20210711_152140657_iOS(2).thumb.jpg.35ea14ff655786279072f4969f8a0945.jpg

    I'm currently using C3675 (4x for the active batteries), KSA1156, C4685A (output CCS), FJPF2145, STN9360, J79, K216.

    • Like 11
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