PSU Designer Help

Discussion in 'Amp Tech Center' started by funandfunny20, Jun 9, 2019.

  1. funandfunny20

    funandfunny20 TDPRI Member

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    Hi Folks,

    Building another amp. Trying to calculate the power supply.

    I'm confused about the source impedance. When I input the secondary DCR (per hammond's spec sheet, http://www.hammondmfg.com/pdf/EDB269JX.pdf) in the source impedance calculator, I'm getting voltages much lower than I would expect. Am I doing this wrong? Trying to get 350v on the first B+ node.

    Am I doing something wrong? I don't have the transformer yet, so I can't measure the secondary DCR myself.
     

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  2. trobbins

    trobbins TDPRI Member

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    The HT secondary resistance in the PSUD2 model refers to half the total V-CT-V resistance, as the V-CT resistance is the current path resistance for a full wave rectifier configuration.

    So replace 350 ohm with 175 ohm.
     
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  3. funandfunny20

    funandfunny20 TDPRI Member

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    thanks! that worked perfectly.
     
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