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Starting new kt120 UL project.

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  • Starting new kt120 UL project.

    Hello. Get new toys thinking to start a new project. 4xKT 120 in UL mode . 650 V / 2300k load. Power supply plan:




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    Last edited by catalin gramada; 08-16-2020, 04:57 PM.
    "If it measures good and sounds bad, it is bad. If it measures bad and sounds good, you are measuring the wrong things."

  • #2
    A UF5408 does not have a high enough reverse blocking voltage for this. Worst case 470VRMS = 658V peak and the diode will have to block twice that = 1316V. You need to you two in series in each leg of the bridge and use say 1M parallel resistors to equalise the reverse voltage across them. That's total of 8 diodes and 8 resistors.
    Experience is something you get, just after you really needed it.

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    • #3
      Originally posted by nickb View Post
      A UF5408 does not have a high enough reverse blocking voltage for this. Worst case 470VRMS = 658V peak and the diode will have to block twice that = 1316V. You need to you two in series in each leg of the bridge and use say 1M parallel resistors to equalise the reverse voltage across them. That's total of 8 diodes and 8 resistors.
      Thanks Nick
      "If it measures good and sounds bad, it is bad. If it measures bad and sounds good, you are measuring the wrong things."

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      • #4
        Originally posted by catalin gramada View Post
        Hello. Get new toys thinking to start a new project. 4xKT 120 in UL mode . 650 V / 2300k load. Power supply plan:
        Looking forward to see how this develops. I have been intrigued with KT120 since they came out but never bought any to try. Amp should have plenty of kick I expect.

        Enjoy. Every. Sandwich.

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