Nakamichi VS. CD-R's - diyAudio
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Old 21st June 2009, 09:20 PM   #1
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Default Nakamichi VS. CD-R's

I have been doing some testing with my Nakamichi TD-45Z & MF-51 CD Changer and various brands and types of CD-R's.

I had posted a question earlier asking about the highest reflectivity CD-R's as i noted that some CD-R's would play and others wouldn't in the Nak Changer. Googling, I saw many post's from others who were having the same problems.

Higest Refelectivity CD-R's??

Thanks to DIY member Nyatt who brilliantly suggested i try the older 650mb disc's as the track pitch is different then the now standard 700mb CD-R disc's, I have found that the some of the older 650mb disc's work! and will play in the Nak decks!

The Nak's are an older car stereo system. But for me, it matches the interior dash lighting scheme of my car and I am more interested in sound quality and less about pop out displays and swimming dolphin graphics. So for now the Nak stays.

In an effort to help others that like me want to keep the Nak's. I thought i would report my findings about which 650mb cd-rs work and which don't! Nak lovers will have to hunt eBay for these older CD-R's and i have found no store that still stocks them!

All disc's mentioned here in will be of the 650mb variety.

I have found that the Silver/Silver types of seem to work best most of the time. For best results, record at 4X.

I went through my CD collection and found as many of the 650mb CD-R's that i have and tried them all in the MF-51 these were recorded years ago on various computer CD burners. so the results have a degree of randomness to them. Most were made on a Sony or Plextor CD Burners as back then that's all i had.

HHB and Mitsui disc's have worked 99% of the time thus far. I have had 1 HHB disc that would almost play but gave problems.

Mitsui Unbranded 650mb 74min Lifetime (Silver/Silver) - Work's

HHB CDR74 Silver 680mb 74 minute(Silver/Silver) - 3 out of 4 play ok

Sony CD-R 650mb CDQ-74CN (Silver/Lt. Blue) - Works

Verbatim Datalife Plus CD-R (Silver/Dark Blue) - Works

Sony CD-R Audio (Silver/Lt. Blue) - No Play

Thats CD-R CDR-74ZY Taiyo Yuden Co. (Silver/Lt. Blue) - No Play

Imation CD-R 650Mb 74mb (Gold/Lt. Blue) - almost played, lots of skips and errors

Smart And Friendly Performance Plus (Gold/Dark green) - No Play



I will add to this list as i can. Other disc's tried were various types of Silver/Silver 700mb disc's and i tried some Memorex Black/Black 700mb Disc's and none worked.
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Old 22nd June 2009, 12:36 AM   #2
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I just burned a new CD Using a Phillips Silver Premium CD-R 74 that is rated 1x - 8X (it's old media) and it is a Silver Top/Light Blue Dye bottom. Looks a lot like the Sony media listed above. I burned using a Plextor Burner at 4X and it works great!. add that to the pile!
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Old 22nd June 2009, 07:08 PM   #3
niteowl is offline niteowl  Canada
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download this and it will show you what to change to make most if not all CDR's play in the MF-51 http://home.cogeco.ca/~niteowl/Nak_MF51.jpg
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Old 22nd June 2009, 07:12 PM   #4
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OHHHHHHHhhhh... hmmm Interesting. will this harm the MF-51 in anyway or stress the laser? what do these mods do?


Thank You!
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Old 22nd June 2009, 07:16 PM   #5
niteowl is offline niteowl  Canada
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It doesn't stress the laser. It changes the bias to make them work. This mod is from the factory a few years back when I was there for some training.
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Old 22nd June 2009, 07:38 PM   #6
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Quote:
Originally posted by niteowl
It doesn't stress the laser. It changes the bias to make them work. This mod is from the factory a few years back when I was there for some training.

Excellent! Thank you! i will give it a shot.
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Old 29th June 2009, 08:45 AM   #7
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The day after I found that pic here I did that to my MF-51. Best addition ever.

I wish I never sold that MF-51. I wait for another MF-51 to fall into my lap. The day after I find/get one, I'll be doing that again.
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Old 29th June 2009, 09:27 AM   #8
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Quote:
Originally posted by whiterabbit
The day after I found that pic here I did that to my MF-51. Best addition ever.

I wish I never sold that MF-51. I wait for another MF-51 to fall into my lap. The day after I find/get one, I'll be doing that again.
I have the parts on order from Digi-key. should be here mon/tues. I'm curious your results after the mod? would the MF-51 play 700mb disc's too?
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Old 29th June 2009, 05:43 PM   #9
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They played every CD under the sun like it was a brand new pressed CD. perfect reliability and perfect dependability. Now THAT is a killer combination!
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Old 29th June 2009, 05:47 PM   #10
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Quote:
Originally posted by whiterabbit
They played every CD under the sun like it was a brand new pressed CD. perfect reliability and perfect dependability. Now THAT is a killer combination!
Sweet, come on parts hurry up!
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