Scratchy sound is often just dirt. Use DeoxIT D5 [16] for metal switches and DeoxIT F5 (FaderLube) [16] for carbon-track volume and tone knobs.
Restoring a vintage Sansui amplifier requires a mix of general electronic components and specific "trouble" parts known to fail over decades. Since Sansui ceased operations in 2014 [23], you won't find new "official" factory parts, but high-quality substitutes are widely available from retailers like Mouser and DigiKey [9]. Essential Replacement Parts sansui amp parts
The most common restoration task. Reliable choices for audio paths include Nichicon FG/KG [7] and Elna Silmic II [7]. For power supplies, Panasonic FC/FM [2] or Nichicon HE [2] are preferred for their durability. Scratchy sound is often just dirt
This community is the best place to find verified substitution lists [9] for discontinued Japanese semiconductors. Since Sansui ceased operations in 2014 [23], you