Finally, an affordable CD Transport: the Shigaclone story

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Sean Henderson

Member
Joined 2004
Peter,

It does make sense that the magnet would affect the laser servo coils, though a ring magnet, which has a consistent field relative to the coils while it is in rotation would be better that two or more small magnets.

So regardless, it seems magnets or relying on a weight are out for the various reasons noted.

The CD Turntable being used in this project does not have means to hold the CD in place designed. So that leave the threaded clamp as seemingly the only good option. Is that what you use, and if not, what did you use?
 
CeeVee

CeeVee

Member
Joined 2006
Paid Member
Peter Daniel said:
And this is what one of 47 Labs dealers says about pucks: http://www.diyaudio.com/forums/digi...ing-high-end-cd-transport-22.html#post1189723
Click to expand...

Hi Peter ...very nice to see you here at this time,

I have a personal opinion that pucks are an easy way to get into trouble and spoil the sound....

An effective puck does not have to look like titanic and very "high end" ...as a matter of fact the small steel balls are not bad and the original magnetic one is very ok as well.

Perfect would be a light, wide magnetic one....does it exist ?...don´t think so.

One should keep in mind that any vibration the puck causes will have the focusing mechanism working overtime to lock and this surely spoils the sound.

As has been explained to death, the perfect puck has to be turned on the motor shaft so that it does not vibrate and is perfectly concentric...no easy task.
 
Peter Daniel

Peter Daniel

Member
Joined 2002
audiosector.com
Paid Member
In my original transport, I used delrin table with Fran's ebony puck and it sounded fine. However, all subsequent transports I've built, were using stock JVC magnetic clamp and they sounded fine too. So now I'm not loosing any sleep about the pucks ;)
 

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uncle_leon

uncle_leon

Member
Joined 2007
studiozey.com/
I have tried an improvised non-magnetic puck, made with a roll of masking tape weighing on the CD. It had a smooth sound, magnetic puck was sharp and a bit harsh in comparison.

I researched this a little more and I am fairly confident that coating the CD platform with a non-slip substance, such as silicone, would make a very light puck with no magnet sufficient.
 
iTiberius

iTiberius

Member
Joined 2005
iTiberius

iTiberius

Member
Joined 2005
buzzforb said:
Tvicol, what path will you take if none can be found? I have a shiglaclone here that i habe not assembled amd was wondering whether to mess with it or not? What about those who have paid? No hurry, just wandering.
Click to expand...

Don't worry, I'm not the man to give up easy. All paid orders are secured and will be honored.
I still search for LC78601RE, but if this part is unobtainable, we'll switch to LC78622.

Regards,
Tibi
 
iTiberius

iTiberius

Member
Joined 2005
danzup said:
At DSP side there is no difference as inside is identically to LC78601RE , but LC8622E do not have inside the microcontroller and need external MCU to receive infrared remote data command and keyboard press and send command to LC8622E .
Its like they cut the command/MCU unit from inside .
Click to expand...

Yep, theoretically should be next step in upgrading Shiga to the next level.

Regards,
Tibi
 
T

tonyptony

Member
Joined 2006
danzup said:
At DSP side there is no difference as inside is identically to LC78601RE , but LC8622E do not have inside the microcontroller and need external MCU to receive infrared remote data command and keyboard press and send command to LC8622E .
Its like they cut the command/MCU unit from inside .
Click to expand...

Does this mean an upgraded design to support the LC8622E would be better, or just different?
 
iTiberius

iTiberius

Member
Joined 2005
tonyptony said:
Does this mean an upgraded design to support the LC8622E would be better, or just different?
Click to expand...

Is LC78622. Could be better, for shure different. :)
From the tehnical point of view it is harder to implement than LC78601. By using an external MCU and display section it gives more design flexibility, but will increase costs. For example we can extend CD servo functions, display more information and we are no more stuck on a multiplexed LCD.
Having separate MCU and display section may offer better DSP functionality and the transport may sound better.
From marketing point of view will be a great improvement. ;)

Regards,
Tibi
 
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