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au-7500

  1. R

    [HELP] Sansui AU-7500 dc offset sudden fluctuate

    Hello AKers, i just bought AU-7500 and not recap yet, because i want to hear how it is before recap. And after checking all transistor i think its still original. Some transistor is not like in schematic, but its looks old. While i test with speaker first day when i turn the power knob off, i...
  2. Leestereo

    Leestereo's Restoration/Upgrade Of A Sansui AU-7500

    A nice Sansui AU-7500 was on the workbench for a complete restoration and upgrade. The restoration/upgrade plan included the following: 1. Replace all power supply electrolytic capacitors with low ESR types (increasing capacity where appropriate). 2. Replace all of the signal path polarized...
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