Transformer voltages (secondary) of Stax SRM-323A

  1. rille2
    I have a defective SRM-323A. The transformer is defective. Can anyone measure the voltages at the secondary side of the transformer? I want to order a custom transformer for replacement and need the exact voltages.
  2. DouglasQuaid
    I have a 313 I could check, but I am uncertain if they contain the same power supply.
  3. rille2
    I don't know if it would help. The problem is the BIAS. It is unregulated and wouldn't have the correct value if the voltage is too high or too low.
  4. rille2
    In the meantime I could repair the amp. I ordered a transformer with 2x240V and 1x9V for the LED.

  5. djonny
    My SRM-323A have strange voltages on transformer secondary: orange - 270V, red - 290V, blue - 6V. I think voltages on orange and red wires must be equal?
  6. kevin gilmore
    A number of different stax models over the years have a higher negative voltage than the corresponding positive voltage.
    Measured at the capacitors the positive voltage should be around 375, and the negative voltage around 400.
  7. zzhetanay
    great work

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