Sony WM-D3 distortion at recording on Right Channel

Discussion in 'Tech talk' started by Benaudio, Nov 13, 2024.

  1. Benaudio

    Benaudio New Member

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    Hi fellow cassette nuts,

    I'm restoring a D3 (that looks like a great little unit) that suffered from some acid leak that I have fully cleaned, repaired the minor damage to the traces below the plastic plate under the batteries (replaced the flexible board with wires).

    It is now working beautifully in play mode.

    Issue is in recording mode, right channel is lower and distorted, the 330hz is much distorted on my scope.
    I have tried playing with the record levels on the trim pots but no change in the sine distortion, even when recording lower.

    Does anybody have any pointers as where to look?

    Thanks,

    Benjamin
     
  2. Benaudio

    Benaudio New Member

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    Nevermind guys , was user error… sorry to waste your time, don’t know how to delete a thread
     
  3. Valentin

    Valentin Well-Known Member

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    Let us know what the user error was, maybe someone else can avoid making it.

    You can't delete a thread, only admins can do that.
     
  4. Benaudio

    Benaudio New Member

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    I was monitoring through headphones socket with a 47kohm load and my levels were way off. At least I suppose one of those things were the cause because after removing the load and tweaking the levels there was no more distortion .

    now I did encounter another issue when setting the PB level using a 400hz HPR tape, setting to 340 mV RMS on the line out (with load) results in a very high PB level with all leds lit and a known good tape playing much to loud. conversely the recording levels need to bet set very low to compensate, and a tape recorded on the D3 plays much too low on my Nak deck and D5M. I don’t understand what I’m doing wrong or if something is off with the unit.

    I was about to post this in your amazing calibration tutorial thread but since you are here…
     

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