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Shigaclone new GB 2013

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#121
Happy new year to all DIYAUDIO community !!!

Starting with tomorrow I'll start to collect money for this GB.
You will get a pm from me asking for paypal address and later I'll send you paypal invoice.

We are still working on documentation, but this will be available shortly on forum and website as well.

Regards,
Tibi
 
#123
Shiga MKII bottom and top.

Regards,
Tibi
 

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#135
Hi Tibi,

Which capacitor do you use for this position?

Quote studiozey: Advanced modifications C906 / C8

This is probably the most puzzling of all Shigaclone capacitors.
The stock JVC player uses a cheap-looking 0.1uF electrolytic cap here, and yet somehow it sounds better than most "audio grade" capacitors - both electrolytic and film.
It is thought to be one of the key reasons behind the early Shigaclone "magic".

Function:
It is connected to pin 10 of the LA9242M, and is used to adjust tracking gain time constant (in the Tracking Servo section).

Recommended value:
The JVC player uses 0.1uF; the LA9242M datasheet suggests 0.068uF; diyaudio experimenters (Okapi and others) suggest an even lower value of 0.01uF.

Regards,
Rudy
 
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#136
Hi Rudy,

For C906 / C8 I use a tantalum 0.1uF.

Here are my personal findings.
If you go under 0.1uF the tracking constant decrease and mechanics will track faster, but become prone to oscillation and on some disks will loose tracking, generating skips and pops.
If you go over 0.1uF tracking is slow due tracking constant increase. Somehow this also affect variable speed disk velocity as well.
The best capacitor for this position is a low series inductance (ESL), low equivalent series resistance (ESR), low current leak capacitor, high stable over time. The closest is tantalum. Any other capacitor will degrade in one or other way the sound or will offer coloration. Organic capacitors may be very good option as well, but I have not tested.

Original capacitor used in stock JVC player is nothing than a price compromise. Change to a good quality tantalum 0.1uF and things will improve.

Regards,
Tibi
 
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#137
tvicol said:
Hi Rudy,

For C906 / C8 I use a tantalum 0.1uF.

Here are my personal findings.
If you go under 0.1uF the tracking constant decrease and mechanics will track faster, but become prone to oscillation and on some disks will loose tracking, generating skips and pops.
If you go over 0.1uF tracking is slow due tracking constant increase. Somehow this also affect variable speed disk velocity as well.
The best capacitor for this position is a low series inductance (ESL), low equivalent series resistance (ESR), low current leak capacitor, high stable over time. The closest is tantalum. Any other capacitor will degrade in one or other way the sound or will offer coloration. Organic capacitors may be very good option as well, but I have not tested.

Original capacitor used in stock JVC player is nothing than a price compromise. Change to a good quality tantalum 0.1uF and things will improve.

Regards,
Tibi
Click to expand...

Hi Tibi!
Do you include the tantalum and all your favored parts in the kit? Kind regards.
 
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