47 Laboratory PiTracer CD transport Unit with one Power Humpty $28.000 - diyAudio
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Old 8th April 2010, 09:30 PM   #1
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Default 47 Laboratory PiTracer CD transport Unit with one Power Humpty $28.000

The ultimatest compact disc turntable ever made?
Who have heard this model in combination with a top class DAC ?

here some URLs:
New Products - PiTracer CD Transport
Stereophile: 47 Laboratory 4704 PiTracer CD transport
SoundStage! Equipment Review - 47 Laboratory Model 4704 PiTracer CD Transport (5/2004)
47 Laboratories Factory Tour [English]
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Old 9th April 2010, 01:05 AM   #2
toufu is offline toufu  United States
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What makes this a better solution than a PC with USB output to a USB ready DAC or a USB to digital convertor?
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Old 9th April 2010, 10:16 AM   #3
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Quote:
Originally Posted by toufu View Post
What makes this a better solution than a PC with USB output to a USB ready DAC or a USB to digital convertor?
... that is the question.
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Old 9th April 2010, 01:40 PM   #4
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Who'll be the first to try a clone?

PiClone anyone?

Fran
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Old 9th April 2010, 02:00 PM   #5
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What an ugly piece of gear.
Looks like somebody had a brainfart and couldn't wait to design it properly.

Quote:
It's also why the PiTracer costs $25.000 USD -- it's a radical design that prohibits mass production.
Quote:
Even if you think that PiTracer is the CD transport that Rube Goldberg would build, it's hard not to respect the originality of its design.
http://www.soundstage.com/revequip/47lab_pitracer.htm

Originality yes - in asking 25 grand. For a cd reader.

Last edited by audio-kraut; 9th April 2010 at 02:07 PM.
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Old 10th April 2010, 02:59 PM   #6
kevinkr is offline kevinkr  United States
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Quote:
Originally Posted by woodturner-fran View Post
Who'll be the first to try a clone?

PiClone anyone?

Fran
Hi Fran,
I suspect underneath it all we would probably find it is not too different than the Shigaclone we know and like so well.. (Same mechanism and chipset in all likelihood.)
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Old 11th April 2010, 09:44 AM   #7
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Quote:
Originally Posted by kevinkr View Post
Hi Fran,
I suspect underneath it all we would probably find it is not too different than the Shigaclone we know and like so well.. (Same mechanism and chipset in all likelihood.)
In view of the price class I would have assumed more, that the
JVC EXU-901A Transport mechanism was inside:
JVC "EXU-901a" (KRELL KPS-25sc Phase Tech CT-1 CT1) better than VAM1254, CDpro2LF ?
But obviously it isn't, instead of this the mechanism from JVC Boom-Box RC-EZ31A (Sanyo "SF-P 101N").

In case of CD player clones from 47 Lab I have found some URLs, that I have just found but still not explicit study:
http://www.audiostereo.pl/forum_wpis...at=36475&p=1#k
http://www.audiostereo.pl/forum_wpis...emat=36475&p=5
(at whole 75 pages)
RC-EZ31 manual
(Service Manual JVC RC-EZ31A - Sanyo "SF-P 101N" mechanism for 47lab clones - really inside by 47lab ??)
CD Transport DIY
Google Nachricht
Finally, an affordable CD Transport: the Shigaclone story
Finally, an affordable CD Transport: the Shigaclone story
Էء JVC RC-EZ31
(at whole more than 400 pages)
*װJVC RC*Ez 31 CD __ٶа
̳ - ӹǰ÷Ŵ - :47-labsshigaclone
Google Nachricht

Anywhere in one of this mentioned forums was claim, that the most used SF-P101N mechanism could be much more better than the CD-Pro2 (VAM1254) from daisylaser.
Concerning the laser Unit (optical pickup) type Sanyo "SF-P 101N" this could be realy true. But concerning the cheap brushed motor instead a hall motor this is hard to believe.
I would be shocked, when for PiTracer would be a such an ordinary brushed motor from Mabuchi in use.

Last edited by tiefbassuebertr; 11th April 2010 at 09:54 AM.
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Old 11th April 2010, 06:49 PM   #8
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Untitled
I read follow:

"The spindle motor to rotate the disc is a coreless 9 pole motor. This motor has a small inertia and very efficient which is most suitable for CD transport that has to change the speed from 500 to 200 rotations in about a minute and also has to repeat stop and go in a micro scale.
This motor is directly attached to the baseboard that weighs almost 10kgm. By the way, the platter weighs about 90grm with a CD on, so the ratio of the mass of the rotating part and the baseboard is over 100 times which, I suppose, would be sufficient."
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Old 2nd November 2010, 05:09 PM   #9
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Which laser head is in use?

Quote:
Originally Posted by woodturner-fran View Post
Who'll be the first to try a clone?
PiClone anyone?
Fran
Any news about that?
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Old 2nd November 2010, 07:43 PM   #10
ide2003 is offline ide2003  Indonesia
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sorry tiefbass, just can not find the 'warm' gear as Junji said

regards
TeguhPS
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