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Old 27th September 2002, 04:40 AM   #1
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Default Y B Blue - how blue LED improves the CD playback

After reading the review of YBA CD 1 Blue Laser CD player in February/97 issue of Stereophile I decided to experiment with blue LED in my CD-PRO transport. Here is some description of the effect.
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Old 27th September 2002, 04:50 AM   #2
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Here is my temporary setup. When the LED is switched off the sound possess certain degree of harshness. I noticed that with my CD-PRO it was more pronounced that with my previous player. That's why I was a bit disappointed after finishing it.

When I switched the LED on the harshness disappeared, the sound is smoother with bigger soundstage, more relaxed and maybe a bit more detailed. Some would say, more analog like.
I think that this mod brings more improvement than installation of triplets that I did befor in my DAC. Highly recommended.

I'll be buying more blue LEDs and installing them in all my other players.
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Old 27th September 2002, 04:55 AM   #3
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Default Re: Y B Blue - how blue LED improves the CD playback

Quote:
Originally posted by Peter Daniel
After reading the review of YBA CD 1 Blue Laser CD player in February/97 issue of Stereophile I decided to experiment with blue LED in my CD-PRO transport. Here is some description of the effect.
Uh, hate to say it but in addition to copyright violation issues, the text in that sidebar violates the rules here regarding the posting of non-factual information.

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Old 27th September 2002, 05:03 AM   #4
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Are you suggesting we should get ready for one of those long threads? How about a bit more of penance for yourself and continuing with that "dual quad litz"?


How come when something is really worth noticing it doesn't get deserved attention? Cable Absolution: Pay Your Penance With the Dual Quad Litz
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Old 27th September 2002, 05:12 AM   #5
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Pete,

This is an interesting concept. It raises a multitude of questions which I'd like to address in followup posts. Here are a few questions/requests/thoughts:

How did you go about finding the correct distance to place the LED from the CD?

Does the light from the LED reach the photodiode in the CDP?

I'd like to ask you to provide me (us) the part numbers for your blue LED and the laser photodiode in your CDP.

It would really be interesting to know the differences in read errors with the blue LED turned on and off.

Lastly, please explain where in your circuit you have the blue LED hooked up.

Do you have any comments on how to go about reproducing your experiment?

Regards,
AudioEnthusiast
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Old 27th September 2002, 05:17 AM   #6
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that is a nice cd player peter. i like it what do you think the overall cost of that thing was to build NOT includeing the metal.

j'
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Old 27th September 2002, 05:18 AM   #7
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Those thoughts and questions are interesting indeed. For now I will address only one. I'm running my blue LED from battery, because I'm afraid that by connecting it to the CD player circuits I might degrade the sonics in some way.
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Old 27th September 2002, 05:22 AM   #8
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Quote:
Originally posted by JasonL
that is a nice cd player peter. i like it what do you think the overall cost of that thing was to build NOT includeing the metal.

j'
It may be nice, but to do something like that takes a lot of manhours. The cost of the parts I ordered from Netherlands was about CAD500, transformers and caps, plus some few other parts might add another 200, metal was cheap, but the hours...
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Old 27th September 2002, 05:23 AM   #9
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Quote:
Originally posted by Peter Daniel
Are you suggesting we should get ready for one of those long threads?
No. Only that the rules here prohibit posting non-factual information. And that sidebar is full of it. How does non-factual information benefit anyone?

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Old 27th September 2002, 05:25 AM   #10
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Quote:
Originally posted by Steve Eddy


How does non-factual information benefit anyone?

se
Who said it should benefit anybody? It should be only observed.
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