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Thread: Digital Amplifiers

  1. #16
    Super Moderator Hofmannhp's Avatar
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    Re2: Power supply for class D amps

    Originally posted by pangea (edited by HP
    Hi!.....
    Then I would build a Stereo amp also with two 200W modules, like a dual mono amp. for the 2225H's I have.
    For this I would also take one 500VA transformer with 2 x +/- 60VDc to support the two channels.
    .
    But I don't know why most transformers have two separate secondary wirings. Is it to support two channels in the amp and to provide for better channel separation? Do I need one or two rectifiers, one for each channel?
    Is it possible to parallel the two secondaries to get more power, when using it for mono use?
    If I'm using both channels on the same side, does that mean channel separation has no bearing, i.e. making it OK to use only one transformer for both channels?
    Can anyone please help me with this and perhaps even show me a schematic on the wiring?

    Grateful as always for any help.

    BR
    Roland
    Hi again Roland,
    I made two drawings for the principal system of the power supply.
    We have to differ between two systems of amp stages.
    This only concerns to the speaker connection with grounded or non grounded.
    HP

    here's the first:
    Attached Images Attached Images
    Please help us save more info about the vintage systems. Let us register your speakers and drivers.

  2. #17
    Super Moderator Hofmannhp's Avatar
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    Power supply for class D amps

    here's the 2nd:
    Attached Images Attached Images
    Please help us save more info about the vintage systems. Let us register your speakers and drivers.

  3. #18
    pangea
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    Re: Power supply for class D amps

    Originally posted by Hofmannhp
    here's the 2nd:

    Herzlichen Dank HP!

    Thank you ever so much!!!
    Toll, Super, Great job!!!

    Am I correct, in assuming that the standard will do quite nicely if I'm using it in a mono stage, or if I'm using both channels in a stereo amp, on the same side (one amp for the left channel and the other amp on the right channel), or are there other reasons for choosing one before the other? somewhat

    BR
    Roland

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