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Old 20th April 2008, 12:02 PM   #21
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On the chinese language (DIYPlus) build thread for spencers D1V3 there is quite a bit of discussion of the various PCM63 doing the rounds.

The verdict according to finneybear (apologies for poor google translation):

" K2 is BB selected to the Sony PCM-3348HR used in digital recording and mastering of PCM-9000 CD masters on the machine. PCM-3348HR a spent 48 K2. K2 is the most common Japanese production, but the Philippines births.

KY Yamaha professional is selected to the plane. Theoretically K2, KY these are only Chiwei goods, 90% of the new goods is false.

Y is for the selection to the professionals, this new model has encountered false Old chance highest. "

Perhaps Spencer or finneybear can weigh in?

cheers
Paul
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Old 20th April 2008, 12:30 PM   #22
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Default !!!

Paul,

good step forward! I was trying Google for "ProAudio" etc, but did not find anything.

As for the Sony PCM-3348HR - it is a Reel to Reel Digital Mastering device; the list price was once US $ 127,000.- ...
I would think that the build-in "K2" can't be a wrong choice, and as we know it should be better then K (of course).

Here is a picture of the 3348-HR. Quite impressive...

I just forward your post to Spencer. Will wait to his reply.

Regards,
IY
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Old 20th April 2008, 01:41 PM   #23
spencer is offline spencer  Hong Kong
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I have the Sony PCM-3348HR service manual and the HR version use SM5842APT and PCM1702U-K.

I think the only way is to test it in a good DAC in order to reveal if the chip is real or not. Also I think the below points should give us some trace:

1. Date code
2. Ink mark or laser marking
3. Used or NOS
4. Text font and positioning

So far I am getting my chips from a China source which I know they took the chips from old equipments or obsolete hifi sets.

I cannot say my KY is really Original or NOT but I feel the sound is more musical to me relative to my PK chips from Ruach. Since the KY are all old chips > 10 yrs old and Ruach chip is relatively newer, I may get same sound after burning Ruach chips for few years!! Who knows!

If I am to fake a PCM63, there are two chips that can be used directly. PCM1702 and PCM1704. PCM1702 is almost identical and the PCM1704 only require minor pin setting to make it work at 20 bits. The idea is to pack the PCM1702 SMD parts into a DIP28 parts and I think it is not too difficult to do it with today technology.

Most important is that I am happy with my chips and the value for the money!
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Old 20th April 2008, 02:38 PM   #24
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If so, the situation clears up:

1.

BB was indeed selling K2, KY and Y, but only to professionals.

2.
It was not in the interest of the big companies (like Yamaha, Sony etc.) to make public to the fact that they are using not their own Chips - but the most excellent BB Chips in their most renown professional devices.

3. BB - from its side - did not put the specifications on their data sheets; Deal. Point.

4. It is easy to build a SMD part (PCM1702 or 1704) into a DIP 28 case; there are many faked chips therefore around (probably also K and K2).

5.
Of course, it would have been silly to build them with an obviously faked print; therefore, there are some original professional K, K2 and Y chips with gold-coloured print as well, and these are also being faked.

6.
To reveal the real quality of the Professional Chip (K2, KY and Y) one needs a true first class DAC & system.

---------------------------------------------------------------------------
beauty_devine – for now I would say, that you should try your “Y” in a first class DAC.

Regards,

IY
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Old 20th April 2008, 04:32 PM   #25
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Quote:
Originally posted by irgendjemand


1.

BB was indeed selling K2, KY and Y, but only to professionals.

And the K2 that I tested have not been any better than random picked J or K. Maybe they were faked.

Quote:
Originally posted by irgendjemand


2.
It was not in the interest of the big companies (like Yamaha, Sony etc.) to make public to the fact that they are using not their own Chips - but the most excellent BB Chips in their most renown professional devices.

???

Quote:
Originally posted by irgendjemand


3. BB - from its side - did not put the specifications on their data sheets; Deal. Point.

Why ? Another potential professional customers could be interested...

Quote:
Originally posted by irgendjemand


4. It is easy to build a SMD part (PCM1702 or 1704) into a DIP 28 case; there are many faked chips therefore around (probably also K and K2).

Big big $$$$$ business to sell a few faked chips to a handfull of DIYers...

Quote:
Originally posted by irgendjemand



5.
Of course, it would have been silly to build them with an obviously faked print; therefore, there are some original professional K, K2 and Y chips with gold-coloured print as well, and these are also being faked.

For the big big $$$$$ business...

Quote:
Originally posted by irgendjemand


6.
To reveal the real quality of the Professional Chip (K2, KY and Y) one needs a true first class DAC & system.

An analyzer will tell you the truth.
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Old 20th April 2008, 05:05 PM   #26
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Quote:
Originally posted by Bernhard
[B]

1.
And the K2 that I tested have not been any better than random picked J or K. Maybe they were faked. [i/B]

[B]

2.
Big big $$$$$ business to sell a few faked chips to a handfull of DIYers... [i/B]




3.
An analyzer will tell you the truth.

Bernhard,

How about deciding what do you want to say? Your quotations 1 and 2 are contradiction... OR: the true fake that I can think about is using the Analyzer instead of the ears…. Or - check your Analyzer (a more polite version, but fake).

One for sure: If the K2 PCMs which you had are no fakes, and if you can’t hear the different between J and K – then: or your Stereo is pure S---T or you better go to check your hearing (seriously).

Now, in Post Nr. 6, I already said that it makes little sense if any to fake the 63 Chips. Here is the quote for you: “it demands a tremendously amount of affords for a relatively small market-segment”. Kapito?

I am not sure if your cynical approach really helps this board. I can also be cynical, and a sharp tongue is not of a problem. I read your Post again - no wonder people are afraid to say things here.

Leben Sie Wohl!
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Old 20th April 2008, 05:40 PM   #27
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Better people don't waste too much money on fancy stamps.

Your perception of sound is subjective. If you prefer Y, that doesn't mean the chips are better. Lots of people like 1543 which is total garbage technically.

Then if somebody reports that the Y chip is inferior to K, you put it on the poor os filter or another matter of bad implementation...

As soon as terms like rich and full are used to describe the sound of a dac chip, it is getting suspicious anyway.

[cynical]

And yes, I'm def, my Stereo is poor and my analyzer is dead...

[/cynical]

I know the correlations between sound and test results of good and bad chips very well.
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Old 20th April 2008, 08:07 PM   #28
A'af is offline A'af  Indonesia
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Hi Folks,

Please calm down, this forum are gentleman, perhaps some others expertise still not found the answers nor the resolve, we need their help!!

But say "fake" cheaply about to build this complicated chips, are out of sense to me, many others semi to plagiat to make money, not to this and for low demand about this chips

BTW, beauty_divine, is that "Y" is restamped or been sanding and relabeling?

About that production date code, are you already asked Burr-Brown (TI now) for that code? Even Burr-Brown not have an Info about "Y" spec?

Burr-Brown not recognize in the data sheet about KY, spencer use of it and say its GOOD, and i also trust those "KY" are not fake!! hehehe....

Good or Bad sound is very relatively especially in this terms, its about "taste"

Lovely to hear, what TI say about this...

all the best,
a'af
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Old 20th April 2008, 11:43 PM   #29
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FWIW I have dismembered a Y that arrived here dead. From what I can tell there is no embedded SMD so that possibility can be eliminated from the list as far as I'm concerned. Sorry the pic is so blurry. The grey area is the wafer which finishes where the chip has been cut in half.

It is possibile the late date coded chips were TI/BB made production runs to manufacturer order after the chips were officially taken off the market.
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Old 21st April 2008, 12:27 AM   #30
spencer is offline spencer  Hong Kong
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If there is a special order for certain equiment or manufacturer, we shall be seeing used old part selling with same marking/datecode now or in future on ebay.

I still do not know what equipment is using K2, Y or KY (if exist) chips inside. Any one can advise?
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