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st-140

  1. MuseChaser

    B&K ST-140 convert to monoblock

    I had posted about this a while ago, but still haven't found anything definitive. I have two ST-140 amps and would love to convert them to a pair of monoblocks, as they were originally available as an option way back when. Does anyone have literature or the expertise to advise in specifically...
  2. ChrisP2

    B&K ST-140 RECAP BOM

    Just finished updating an ST-140, thought the attached BOM would help others as this was a bit of a journey.... 1988 Unit with TO-3 MOSFETs - Which were luckily in good shape Unit had issues on left channel with Offset & BIAS - All Fuses Blown on that channel. Full Recap including 22mF Filter...
  3. TheBrownNote

    B&K ST-140 Service Manual and/or advice needed (low bias adjustment problem)

    I'm looking for a service manual and/or circuit description for the B&K ST-140 or ST-140M. I already have a few low resolution versions of the schematic, the minimalist owner's manual, and a one-pager on adjusting bias that applies to multiple amps. I'm not sure if they ever produced a model...
    • TheBrownNote
    • Thread
    • b&k bias adjustment st-140
    • Replies: 22
    • Forum: DIY
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