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ca-810

Discussion in 'Yamaha' started by Willy6, Nov 16, 2017.

  1. avionic

    avionic " Black Knights " Subscriber

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    Probably why they are mounted on heatsinks.;) The MJ's will run just as hot. I'd just freshen up the transistor thermal compound. And keep using the OEM.
    Erradicate all dried glue thats in the area. If there is any.:thumbsup:
     
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  2. avionic

    avionic " Black Knights " Subscriber

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    Did you remedy the hummmmmm ?
     
  3. rottalpha

    rottalpha Yamaholic Subscriber

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    if they fit, those are awesome caps
     
  4. Willy6

    Willy6 AK Subscriber Subscriber

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    No I just checked everything over and resoldered a few wires but the hum is still there I think I'll replace the wires from the meter light board to the speaker terminals with some TFE wire I use when I restuff a large capacitor it's 18gauge silver coated copper strand wire with Teflon insulation.
     
  5. Willy6

    Willy6 AK Subscriber Subscriber

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    I replaced the ground wires after finding one frayed only a few strands left on it hoping that was the problem but no still have the hum which gets quite a bit louder when I move the selector switch from aux to phono. 20171222_140430.jpg
     
  6. Willy6

    Willy6 AK Subscriber Subscriber

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    I wonder if bypass caps would help?
     

     

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  7. avionic

    avionic " Black Knights " Subscriber

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    Probably not..
     
  8. avionic

    avionic " Black Knights " Subscriber

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    How loud is this hummmmm ? Through the AUX input ?
     
  9. avionic

    avionic " Black Knights " Subscriber

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    The PHONO 9.9 times out of 10 will have floor noise.Without any TT hooked up. Shorting plugs on the unused RCA's will eliminate the hum or drastically reduce it-----> just for the PHONO.
     
  10. avionic

    avionic " Black Knights " Subscriber

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    Does the hum change in any way by moving/ wiggling the wiring to the lamps ?
     
  11. Willy6

    Willy6 AK Subscriber Subscriber

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    I just tried wiggling the wires to the lamps and the lamps went out and the hum was not as loud but still there wiggled again lamps back on louder hum
     

     

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  12. Willy6

    Willy6 AK Subscriber Subscriber

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    Maybe it's one of those red things? 20171223_194126.jpg
     
  13. Willy6

    Willy6 AK Subscriber Subscriber

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    I did put bigger main filter caps in the originals were 58v 12000uf and the new ones are 63v 15000uf
     
  14. avionic

    avionic " Black Knights " Subscriber

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    No way...If they were bad. Your volume would be drastically reduced.
     
  15. avionic

    avionic " Black Knights " Subscriber

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    Bad solder connections or loose wiring.
     
  16. avionic

    avionic " Black Knights " Subscriber

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    No issue with that. But....
    Check the solder connections for cold solder connections.
     

     

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  17. avionic

    avionic " Black Knights " Subscriber

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    One red inductor for each channel. They are L901 and L902 at the very output of each amplifier.
     
  18. Willy6

    Willy6 AK Subscriber Subscriber

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    I'll resolder things and put some new resistors in and maybe put few new chassis grounds in
     
  19. avionic

    avionic " Black Knights " Subscriber

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    What resistors ?
     
  20. Willy6

    Willy6 AK Subscriber Subscriber

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    The ones on the lamp board
     

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