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Pete B

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  • Gender
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    Connecticut, NE USA
  • Interests
    Interest in Audio for over 30 years, got started early
    Electrical Engineer (see my web site link)

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  1. mikehr

    Hi Pete,

    I am in the process of repairing an old classic of mine. The Hafler DH-110. Like many I am having issues with the J112 switching FET. Yes, I could just replace it when it fails but I would prefer a better more permanent solution. I would like to eliminate the J112 and modify the circuit with a high quality relay. I have read from a really old post that you have done this mod. If you don't mind would you care to share how you did it. I did not see a post anywhere on this. I studied the circuit but I am not seeing how do do it even though it looks like a simple solution. You can send me an email as well.

    mike.kehr1@gmail.com

    Thanks in Advance,

    Mike

    1. Pete B

      Pete B

      Hi,  I thought about doing that but never got around to it.

      I removed the J112 s and am now very careful about the power up/down sequence 

      until I do the relay mod.

      Thanks for your interest, Pete

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