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555a

  1. quadmatrix82

    Sansui au-555a flying saucer transistor replacement

    Hi all I’m restoring a Sansui au-555a and wondering if bd-139 and bd-140 are suitable replacements for cdc8002/90002 transistors? Given ksc2690 and ksa1220 are getting hard to find now I have a lot of the bd transistors on hand which I’d prefer to use given they are still readily available any...
  2. Leestereo

    Repair and Upgrade of a Previously Recapped Sansui AU-555A

    On the bench is a Sanusi AU-555A that was sent in by an AK member for repair and upgrade. The background on this unit: the owner had this unit recapped (approximately a year ago by a tech local to him), but was less than satisfied with the results. Aside from the lackluster sound following the...
  3. H

    Sansui 555a - left channel is weaker

    Hi! I have the impression that the right channel plays harder than the left. I measured the voltage at the headphone output and it turned out that the right channel has 332mV and left 321mV. These values shouldn't be equal? Can I somehow adjust that?
  4. H

    Sansui 555a - right channel stops working after some time

    Hello! I did a full recap of my old Sansui 555a, I replaced also transistors XA495, 8002, 9002 and 2SC281. Everything now sounds great but recently after a longer listening right channel stops working. I was frightened that it had broken, but when I turned off and turned on the amplifier...
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