Finally, an affordable CD Transport: the Shigaclone story - Page 736 - diyAudio
Go Back   Home > Forums > Source & Line > Digital Source

Digital Source Digital Players and Recorders: CD , SACD , Tape, Memory Card, etc.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 15th August 2013, 12:12 PM   #7351
TheGimp is offline TheGimp  United States
diyAudio Member
 
TheGimp's Avatar
 
Join Date: Aug 2009
Location: Johnson City, TN
Go back one page and look for tivicol (Tibi). He has links at the bottom of his post to his web site, and links to the sign up for the next release.

You could also email or pm him.
  Reply With Quote
Old 19th August 2013, 03:41 PM   #7352
diyAudio Member
 
Join Date: Apr 2005
Location: Singapore
I implemented separate 5V supply using Peter's recommended
regulator.

There is sonic improvememt. But I have a problem. It
takes longer than usual to read TOC, play for a while and skips.

When I reverted back to internal supply, it plays perfectly.

What is causing this problem? Help appreciated.

Goh
  Reply With Quote
Old 20th August 2013, 06:13 AM   #7353
tvicol is offline tvicol  Romania
vicol-audio.ro
diyAudio Member
 
tvicol's Avatar
 
Join Date: Jan 2005
Location: Bucharest
Send a message via Yahoo to tvicol Send a message via Skype™ to tvicol
Quote:
Originally Posted by Audiohifi View Post
I implemented separate 5V supply using Peter's recommended
regulator.

There is sonic improvememt. But I have a problem. It
takes longer than usual to read TOC, play for a while and skips.

When I reverted back to internal supply, it plays perfectly.

What is causing this problem? Help appreciated.

Goh
You have a grounding issue, or one of your 5V supply is noisy/oscillating.
Take care to keep ground in a star fashion.
Which board do you use - JVC or Shiga ?

Regards,
Tibi
  Reply With Quote
Old 21st August 2013, 12:12 AM   #7354
diyAudio Member
 
Join Date: Apr 2005
Location: Singapore
Quote:
Originally Posted by tvicol View Post
You have a grounding issue, or one of your 5V supply is noisy/oscillating.
Take care to keep ground in a star fashion.
Which board do you use - JVC or Shiga ?

Regards,
Tibi
Thank you Tibi. I use JVC boombox board.
I replaced the op amp with lower frequecy one, but still
not reading well.
I will rebuild the regulator and see how it works.
Can Q902 be removed making sure there is 8V supply
to the motor control chip?
BTW is there a provision in you new board for separate 5V
supply and do you have 5V supply board?

regards
Goh
  Reply With Quote
Old 21st August 2013, 09:17 AM   #7355
tvicol is offline tvicol  Romania
vicol-audio.ro
diyAudio Member
 
tvicol's Avatar
 
Join Date: Jan 2005
Location: Bucharest
Send a message via Yahoo to tvicol Send a message via Skype™ to tvicol
Goh,

Check if your regulators are not oscillating with an oscilloscope. Check also if output regulation voltage is in 5V +/-0.25V range.
Q902 can not be removed because IC903 provide system reset as well. If you remove Q902, in order to read TOC, you'll need to power off/on for each CD.

Yes, the Shiga MKII will have separate pcb for several 5V regulators, but in order to keep kit cost low these will not be populated by default. You'll have to buy parts and mount by yourself, or simply use other regulators like tentlabs, jung supergeg, alw etc.

Regards,
Tibi
  Reply With Quote
Old 21st August 2013, 01:36 PM   #7356
diyAudio Member
 
Join Date: Jun 2006
I have some spare JVC RC31 transport for sale and have placed the first one on ebay. Search for Shigaclone cd transport...
  Reply With Quote
Old 23rd August 2013, 03:24 AM   #7357
diyAudio Member
 
Join Date: Apr 2005
Location: Singapore
Quote:
Originally Posted by tvicol View Post
Goh,

Check if your regulators are not oscillating with an oscilloscope. Check also if output regulation voltage is in 5V +/-0.25V range.
Q902 can not be removed because IC903 provide system reset as well. If you remove Q902, in order to read TOC, you'll need to power off/on for each CD.

Yes, the Shiga MKII will have separate pcb for several 5V regulators, but in order to keep kit cost low these will not be populated by default. You'll have to buy parts and mount by yourself, or simply use other regulators like tentlabs, jung supergeg, alw etc.

Regards,
Tibi
Voltages are within range. I will rebuild the regulator using pcb.
Peter Daniel implemented discrete 5V with improvements so I am trying hard.
Thanks Tibi

Goh
  Reply With Quote
Old 27th August 2013, 01:49 PM   #7358
diyAudio Member
 
dimkasta's Avatar
 
Join Date: May 2010
Location: Athens
I was under the impression that my Salas powering the motors was not very effective with its 500mA. There was no blink on the leds, but the setting was rather marginal. So I boosted it today to give 1A.

There was a distinct increase in performance, but I have to say things are getting ugly in the PSU case... WAY too much heat going on...

I am considering using the 7808 again for that part. I m not really sure it is worth the effort. I will probably keep the extra salas and convert it to 5V in case I decide to separate the clock in the future.
__________________
Second harmonic and semi-sweet wine for everyone...
The DIY Tone! | Shigaclone
  Reply With Quote
Old 16th September 2013, 01:12 PM   #7359
tvicol is offline tvicol  Romania
vicol-audio.ro
diyAudio Member
 
tvicol's Avatar
 
Join Date: Jan 2005
Location: Bucharest
Send a message via Yahoo to tvicol Send a message via Skype™ to tvicol
Prototype Shiga MKII boards are ready. Few more parts to collect and beta testes will have to power up irons and show the skills. :-)

Shigaclone new GB 2013

Regards,
Tibi
  Reply With Quote
Old 17th September 2013, 12:17 PM   #7360
TheGimp is offline TheGimp  United States
diyAudio Member
 
TheGimp's Avatar
 
Join Date: Aug 2009
Location: Johnson City, TN
Regrettably since I have both of my gen 1 units working, I can't justify the cost of another unit.

Otherwise I'd buy one for comparison.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



New To Site? Need Help?

All times are GMT. The time now is 08:11 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2