Light color of bulbs in a CR-820

Discussion in 'Yamaha' started by Tchristian, Jun 25, 2018.

  1. Tchristian

    Tchristian New Member

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    43
    I just replaced the incandescent bulbs in my CR-820 with LEDs. I finally got them working but discovered the guy who sold the LEDs to me as a "kit" specifically designed for the Yamahas sent three 5mm warm white bulbs and a 3mm cool white bulb for the pointer. I asked him if he would send a warm white 3mm and he said he'd send another 5mm warm white (which would be difficult to fit in the space provided on the 820). So I asked him if he could send me 3 cool white 5mm bulbs. He replied that the original build had a different color bulb for the pointer than the meters. I'm not sure how this could be true given they were all incadescent. It sounds like a load of BS to me, but maybe someone who has a better recollection of the 70's can school me.

    Here's a transcription of our conversation:
    upload_2018-6-25_13-45-49.png
     

     

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  2. Blue Shadow

    Blue Shadow I gotta get me a new title

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    The 5mm could have a mm filed off each side and possibly fit.
     
  3. avionic

    avionic " Black Knights " Subscriber

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    Buying the LED's directly from Mouser is probably cheaper than those so called EBAY kits.
     
  4. Tchristian

    Tchristian New Member

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    Would this diffuse the light output too much?
     
  5. Tchristian

    Tchristian New Member

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    In retrospect that probably would have been cheaper. It was $25 for 5 bulbs.
     
  6. restorer-john

    restorer-john Addicted Member

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    Australia
    They were all the same colour and they all used the same colour filter.

    See my thread here, it covers the CR-820.

    http://audiokarma.org/forums/index....ht-on-yamaha-receivers-and-amplifiers.825896/

    cheers
     

     

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  7. Tchristian

    Tchristian New Member

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    I've actually read your thread in great detail when I was trying to get them to actually work. I refurbished the sockets per your instructions and I agree with your opinion about some of the horrific color choices people have made.
     
  8. Tchristian

    Tchristian New Member

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    Attached Files:

  9. restorer-john

    restorer-john Addicted Member

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    5,751
    Location:
    Australia
    Yikes.

    The pointer LED is definitely a coolish white and when combined with the aqua filter you are getting that result. Did you manage to remove the remains of the black/brown tape from the meter assemblies?

    The 'kits' sold on eBay should be avoided- they are mostly pre-wired Chinese LEDs being repackaged and sold at a vast profit. Issues being, you really don't know what actual colour temp LEDs you are getting, what current they are running and whether they include appropriate reverse breakdown diodes for AC installations.
     
  10. Blue Shadow

    Blue Shadow I gotta get me a new title

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    The LED projects light forward but since it is in a box the light bounces around all over the place as it makes it way down the dial pointer. Slicing a mm off a couple sides of the LED isn't going to make the light not want to make it to the dial pointer.

    I just rebuild an 820, it got light bulbs because:
    1) they work
    2) they are readily available from the regular source
    3) they are a drop in replacement
    4) they look right
    5) they were easy to replace
    6) future replacement is 10-30 years away
    7) by then I will be happy to do it again or I won't give a damn.

    I hate LED downgrades for lights unless the make the unit look better. Many LEDs are just now getting to that point.

    Sorry for your difficulties, but if you do end up shaving a mm off the 5er, take the sides that won't take out the electrical parts.
     
  11. Mr. Yamaha

    Mr. Yamaha Not so much Yamaha lately... Subscriber

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    $25 for $1 worth of LED's :eek:

    I'm sorry, but that looks horrible. The seller doesn't know what he's talking about ;)
     

     

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  12. avionic

    avionic " Black Knights " Subscriber

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    Dial pointer and meters are suppose to be the same shade of yellowish-green.
     
  13. Tchristian

    Tchristian New Member

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    I had an extra 5mm LED so I shaved a bit off each side as you suggested. I gently belt sanded two sides and then wet sanded with 500 grit to polish it. Worked a treat! Now I’ve got a proper color scheme. Thanks for all your comments and insight.
     

    Attached Files:

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  14. Blue Shadow

    Blue Shadow I gotta get me a new title

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    Glad that worked and you are all evened out light-color-wise.
     
  15. avionic

    avionic " Black Knights " Subscriber

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    Looks much better..:thumbsup:
     
  16. fernarias

    fernarias Super Member

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    He probably assumed that you had a yellowed dial pointer and hence the cool white leds.
     

     

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