1. Time for some upgrades in server hardware and software to enhance security and take AK to the next level. Please contribute what you can to sales@audiokarma.org at PayPal.com - Thanks from the AK Team
    Dismiss Notice

Sansui AU-X1 speaker relays.....

Discussion in 'Exclusively Sansui' started by slimecity, Sep 14, 2018.

  1. slimecity

    slimecity Super Member

    Messages:
    2,994
    Location:
    New Zealand
    Hi there Sansui Nerds

    Has anyone replaced these in their X1? Is a current drop-in modern type available without any modification?

    I have one channel with very slight distortion at low volume which goes away once the volume is increased a bit, suggesting relay issues IMO.

    cheers!
     

     

    Please register to disable this ad.

  2. slimecity

    slimecity Super Member

    Messages:
    2,994
    Location:
    New Zealand
  3. OverLoad

    OverLoad High On Solder Fumes

    Messages:
    1,376
    Location:
    Ontario, Canada
    Hyperion likes this.
  4. Hyperion

    Hyperion Roobarb & Custard Subscriber

    Messages:
    48,022
    Location:
    Hertfordshire, UK
    Last edited: Sep 15, 2018
  5. slimecity

    slimecity Super Member

    Messages:
    2,994
    Location:
    New Zealand
    Phew, cheers - yea I thought that other part was a bit spency.......
     
  6. kevzep

    kevzep Its all about the Music Subscriber

    Yep, gotta have the "0" in the part number which means through hole...
     
    slimecity likes this.

     

    Please register to disable this ad.

  7. Hyperion

    Hyperion Roobarb & Custard Subscriber

    Messages:
    48,022
    Location:
    Hertfordshire, UK
    Your knowledge of Omron part numbers is being exercised lately. :thumbsup:
     
    slimecity likes this.
  8. Vintagear

    Vintagear Super Member

    Messages:
    1,528
    Wow, that was a fast response time! I knew I had a picture of mine saved somewhere, finally found it and it looks like you got the right answer (you can make out the LY2 - 0 24VDC in the pic). Good luck, I hope the replacements solve your issue.

    [​IMG]
     
    Last edited: Sep 16, 2018
    Hyperion likes this.
  9. kevzep

    kevzep Its all about the Music Subscriber

    Yeah I have had a run of jobs lately that need relays....so getting familiar with the part numbers...
     
    slimecity likes this.
  10. slimecity

    slimecity Super Member

    Messages:
    2,994
    Location:
    New Zealand
    Cheers - it will solve one issue - dont worry there are several other issues in my X1 to also sort out! lols
     
    Vintagear likes this.
  11. slimecity

    slimecity Super Member

    Messages:
    2,994
    Location:
    New Zealand
    Just curious about the large resistors by the speaker relays - are they some sort of dummy load to improve output stability if the speakers are switched off?

    What is their purpose?
     

     

    Please register to disable this ad.

  12. Hyperion

    Hyperion Roobarb & Custard Subscriber

    Messages:
    48,022
    Location:
    Hertfordshire, UK
    They are part of a 'Boucherot Cell' (sometimes called a 'Zobel Network') comprising one resistor and one capacitor (per channel) to damp high frequency oscillations at any time, but especially when the speakers are disconnected. :)

    This arrangement is very common in audio amplifiers, and if an amplifier is unstable and oscillating (at a high frequency) those resistors can get extremely hot.
     
    Last edited: Sep 16, 2018
    slimecity likes this.
  13. slimecity

    slimecity Super Member

    Messages:
    2,994
    Location:
    New Zealand
    Sweet - thanks hyperion. I've seen zobels in amp output stages before but the resistors have so far not been this huge!
     

Share This Page