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jcm 800

  1. J

    Marshall JCM800 Lead Series Repair - Power Issues

    This JCM 800 landed on my bench had cutout issues as reported and was apparently blowing out fuses. This sounded strange, but since it was blowing out fuses, this is going to have to be put into service position and troubleshoot with the power-off. This will start with a visual inspection. The...
    • JRUBIN
    • Thread
    • capacitor jcm 800 lead series marshall repair
    • Replies: 2
    • Forum: Tube Audio
  2. J

    Marshall JCM 800 2203 Guitar Amp - Tube Swap and Re-Biasing

    Chris from Cornerstone joins me again for this Marshall re-biasing video. This is an all original JCM 800 - 2203 that is receiving new tubes all around. Of course, a quick inspection is in order. Measurements of the electrolytic caps show that most of the caps are good, one of the filter...
    • JRUBIN
    • Thread
    • amplifer bias jcm 800 marshall rebias robotube
    • Replies: 0
    • Forum: Tube Audio
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