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7868

  1. Sterling245

    Sherwood S-5500ii Blowing Power Tube (7868)

    Hi all, Today I was listening to my Sherwood S-5500ii when all the sudden I heard a hum from the right speaker. Before I could get over to it to shut it down, the main fuse blew. I went ahead and tested the output tubes, and found one of them had shorted. I opened up the amp to check and see if...
  2. Harlon

    7868 Tube ID Help?

    I picked up a Bogen PA CHB100 today. Haven't had a chance to open it up yet, but was able to wiggle out a couple of the 7868 power tubes. It has a quad. The only markings I see are the tube number and U.S.A. printed on the top and "Pro/Comm industrial grade" on the sides. I found a little on...
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