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About spc1001

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  1. My D 150-A has developed quite a turn-on thump. What could be the cause and how can it be corrected?
  2. My D150-A has developed quite a prominent thump on turn-on. What could be the problem and how can it be solved?
  3. In an older D 150A what capacitors should be replaced to bring the unit up to spec?
  4. Can you give an alternate source for the power lamp on the D150A. Part number C 2900-6. 36v .1a.