Finally, an affordable CD Transport: the Shigaclone story - Page 91 - 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 10th May 2008, 05:33 PM   #901
johnm is offline johnm  United Kingdom
diyAudio Member
 
johnm's Avatar
 
Join Date: Sep 2003
Location: Hampshire
Just a quick tip to those using the JVC transport as standard (i.e. with the puck). You get a slight increase (OK then, I guess this falls under the 'perceived' banner ) in quality by taking the magnetic out of the puck, applying a tin layer of cork (or rubber mat) to the underside to protect from scratching the CDs, and reducing the magnetic 'pull' slightly by creating a slight gap between magnet and CD. No more oscillation, and - I think - this means less work for the servos/error correction circuits, which MAY result in an increase in sound quality.

Worth a try at any rate - it's free
  Reply With Quote
Old 10th May 2008, 05:51 PM   #902
okapi is offline okapi  United States
diyAudio Member
 
okapi's Avatar
 
Join Date: Aug 2004
Location: Buffalo
Default spring resonance calc

don't forget to divide the suspended weight by four to account for the use of four springs.
  Reply With Quote
Old 10th May 2008, 06:49 PM   #903
...truth seeker...
diyAudio Member
 
Ed LaFontaine's Avatar
 
Join Date: Feb 2004
Location: where the Appalachians rise from the Blue Grass
Default Ace is the place?

The Ace hardware store's selection of springs was numerous, just not right. I also saw that any spring in the size range of interest would be ~$3-4 each.
I'll chip in for a dozen or more of the McMaster-Carr #9657K101.

Would any of you be interested in 4?..this is a one-time offer, pm me if so.

I'll let this idea run for a few days before I place the order....shhhh...be verwy, verwy qwiet, don't want to provoke the moderators into moving this into the marketplace.

As to the use of o-rings: I'll use them as tensioners. I'll look for the x-section, length and number needed to compress the springs in order to kill resonances.
  Reply With Quote
Old 10th May 2008, 08:16 PM   #904
diyAudio Member
 
luvdunhill's Avatar
 
Join Date: Jul 2006
Default Re: spring resonance calc

Quote:
Originally posted by okapi
don't forget to divide the suspended weight by four to account for the use of four springs.
oops......

Ed:

I'll take the other 4 springs, provided that you can throw a few other parts in your order for me as well.
  Reply With Quote
Old 10th May 2008, 09:17 PM   #905
kevinkr is offline kevinkr  United States
diyAudio Moderator
 
kevinkr's Avatar
 
Join Date: Sep 2004
Location: Boston, Massachusetts
Blog Entries: 6
Default Re: shigaclone

Quote:
Originally posted by quan
Hi guys, need help -again ,accidentally i destroyed the pad for positive 8v in -position -old choke was removed-was using a drill to widen the hole but went too far thus stripped all pad!!
How do i go about fixing the problem.
Could direct connection to C902 work?
Quan:
The board is single layer, and yes a connection to C952 (Not C902 which should be a small smd cap totally unrelated to power.) should work fine. You haven't explained why the cap burned - did you put more than 10V power into the board? (C952 is only rated for 10V, with derating should not see more than 8V on a continuous basis for reliability.

Johnm:
I think my RCEZ32 based clone significantly outperforms my media server in some ways. It seems generally a touch more refined - nothing earth shattering as the server is quite good, and the differences aren't immediately apparent in casual listening. I think one particular area where the clone really seems to stand out is in the frequency extremes, the bottom octaves are extremely well defined, controlled and convincing, and in the very top octaves this is some of the cleanest "undigital" sound I have heard from cd.
__________________
"Extraordinary claims require extraordinary evidence." - Carl Sagan
  Reply With Quote
Old 11th May 2008, 12:12 AM   #906
diyAudio Member
 
JC Fardo's Avatar
 
Join Date: Jun 2002
Location: Sao Paulo - Brazil
Quote:
Originally posted by hayenc
Thanks for the spring reference. Amazon has similar through Small Parts if you don't want 12. Ace did not quite have anything with a diameter that large.
Could this Small Parts P/N be suitable?

CSMW-0269

Thanks
__________________
JC
  Reply With Quote
Old 11th May 2008, 01:16 AM   #907
...truth seeker...
diyAudio Member
 
Ed LaFontaine's Avatar
 
Join Date: Feb 2004
Location: where the Appalachians rise from the Blue Grass
Quote:
Could this Small Parts P/N be suitable?
I think so. Please note this spring is depicted as having a closed, but not ground, end. This means it will not rest upright on a flat surface. If you can accommodate that into your build, you should be fine. This says nothing about the balance between the spring rate and the weight of plinth upon it.

Click the image to open in full size.

The spring referenced earlier from McMaster-Carr has closed as well as ground ends. See below.


Click the image to open in full size.
  Reply With Quote
Old 11th May 2008, 01:52 AM   #908
...truth seeker...
diyAudio Member
 
Ed LaFontaine's Avatar
 
Join Date: Feb 2004
Location: where the Appalachians rise from the Blue Grass
Default balance

For the last couple of hours I should have been mindful of other things. As it was, I remained distracted with thoughts about the plinth. This is only a concept, I welcome comments and suggestions.

I see the plinth carrying the cd drive and laser mechanism. The plinth is made from a dense wood like hard maple, up to 2" thick. I see the springs countersunk into ~1" diameter holes near the corners of the plinth. It is likely rectangular in plan view. The countersinks are not equidistant from the corners of the plinth. Close, but offset just a little.

My mention of o-rings earlier (shoot, they could be rubber bands, just more of them) includes them being angled from vertical. Equal numbers of them in opposition to lend torsional stability to the mix. The points of attachment and number of them to be determined as the assembly becomes complete.

The sub-base for all of this receives the bottoms of the springs and provides the lower points of attachment for the tensioners. It is at least 1/2" thick baltic birch with slotted holes to allow adjusting it's position within the case. luvdunhill suggested the use of die spring screw caps for holding the ends of the springs. See below. Something like that will be needed.

Click the image to open in full size.

We all know what happens to rubber bands over time. Their use can provide a solution for a time, I think. My thoughts for o-rings anticipates their longer lifespan.
  Reply With Quote
Old 11th May 2008, 02:24 AM   #909
diyAudio Member
 
JC Fardo's Avatar
 
Join Date: Jun 2002
Location: Sao Paulo - Brazil
Quote:
Originally posted by Ed LaFontaine


I think so. Please note this spring is depicted as having a closed, but not ground, end.
Correct. This is something to consider. Thanks for advise
About the O rings honestly I cantīt figure how they go with springs assembly since I didnīt see a pic so far in this thread. No rubber bands at all, they wonīt last six months.

Time to bed now
Thanks again and later
__________________
JC
  Reply With Quote
Old 11th May 2008, 04:23 AM   #910
quan is offline quan  Australia
diyAudio Member
 
Join Date: Feb 2007
Location: sydney
Question shigaclone

Thanks Kevin for the reply,
i have tried to connect the PS thru C952 which meant to removed anyway from RC-EZ31.
The problem is that- no power onto the transport board, the C902 which i think is a voltage regulator gets very hot and then smoke. It is not the cap that smoke.
The other thing that i noted as well that the transformer from the power supply start to hum or oscillate?.
Where should i check next?.
  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 01:39 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright Đ1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2