Finally, an affordable CD Transport: the Shigaclone story - Page 84 - 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 6th May 2008, 12:28 AM   #831
diyAudio Member
 
Algar_emi's Avatar
 
Join Date: Oct 2002
Location: Canada, Qc
Recycling the EZ31B's. Removing parts from these units left over a huge amount of scrap. Just to let you know that I try to recycle as much as I can. I removed all metal parts from the plastics, separated all metal and plastic type, recycled the packaging, etc. It takes a long time to do it, but at least, the left overs don't go straight to the garbage. I'll try to give for free (just pay the shipping) all the little 3.5" speakers, maybe for a little line-array speaker project.
  Reply With Quote
Old 6th May 2008, 12:47 AM   #832
okapi is offline okapi  United States
diyAudio Member
 
okapi's Avatar
 
Join Date: Aug 2004
Location: Buffalo
Default spring resonant frequency calculator

a few weeks back i put together a little spreadsheet to calculate the resonant frequency of a spring from mcmaster carr data.

the MS excel file can be found here

the cells that require data entry can be altered the others are protected/locked.

this is far from my area of expertise so those more familiar with these types of calculations may want to double check my work.

a group buy on springs may not work as i would expect that the weight of different chassis could vary quite significantly.

my impression is that with a large enough mass it should be possible to get the resonant frequency under 10hz.

i expect that damping the springs as peter did will also change the resonant frequency.
  Reply With Quote
Old 6th May 2008, 06:23 AM   #833
hayenc is offline hayenc  United States
diyAudio Member
 
hayenc's Avatar
 
Join Date: Apr 2005
Location: Glendale, AZ
Send a message via Yahoo to hayenc
Default Post-Mortem on the Z32

The magic smoke yesterday turned out to be C950, a 1000uf 10V electrolytic at the input of the transport. Easy decision on not keeping that one.

Rebuilt the power supply with larger heat sink on 8 volt regulator, replaced bad regulator that finally blew and the capacitor that went with it, or maybe the other way around, who knows.

Bottom line, the transport itself survived and now sounds great. Using a modified PS board from a not to be named DIY circuit that had a bad flaw. This board has two supplies so am running the 8 volts on one and the 6 V and 12 V on the other. The 8 V has 2200 uf before and 2x 1000 uf post reg, all Nichicon Muse. Nice punch, nice extension.

Back to replacing other parts like the crystal and working on a case.
  Reply With Quote
Old 6th May 2008, 01:33 PM   #834
diyAudio Member
 
JC Fardo's Avatar
 
Join Date: Jun 2002
Location: Sao Paulo - Brazil
Quote:
Originally posted by Algar_emi
Only 3 units left already.

MrMajestic I have a friend in Europe (Netherland) looking for the EZ31. Send me an email, I'll make you in contact with him. He may buy your extra unit.
Hi

YGM
__________________
JC
  Reply With Quote
Old 6th May 2008, 01:55 PM   #835
kevinkr is offline kevinkr  United States
diyAudio Moderator
 
kevinkr's Avatar
 
Join Date: Sep 2004
Location: Boston, Massachusetts
Blog Entries: 6
Default Re: Post-Mortem on the Z32

Quote:
Originally posted by hayenc
The magic smoke yesterday turned out to be C950, a 1000uf 10V electrolytic at the input of the transport. Easy decision on not keeping that one.

Rebuilt the power supply with larger heat sink on 8 volt regulator, replaced bad regulator that finally blew and the capacitor that went with it, or maybe the other way around, who knows.

Bottom line, the transport itself survived and now sounds great. Using a modified PS board from a not to be named DIY circuit that had a bad flaw. This board has two supplies so am running the 8 volts on one and the 6 V and 12 V on the other. The 8 V has 2200 uf before and 2x 1000 uf post reg, all Nichicon Muse. Nice punch, nice extension.

Back to replacing other parts like the crystal and working on a case.
hi hayenc,
I'm going to assume that the voltage regulator was bad to start with and C950 exploded because there was substantially more than 10V across it..

FWIW I have found that mine '32 sounds significantly better with the stock capacitor in that location than without it, this even being the case with standard Black Gate caps in the psu. I tried several different types in the supply, but can hear a definite improvement with the BG. (This with about 7" of kimber tcss wire between the supply output and the mechanism.) I'd recommend getting a few of at least the 16V std BG for this location - it's more audible than you might suspect. For C950 you might want to try something similar to the original in that location and see if you can hear a difference.

This thing sounds really good.
__________________
"Extraordinary claims require extraordinary evidence." - Carl Sagan
  Reply With Quote
Old 6th May 2008, 02:22 PM   #836
diyAudio Member
 
Peter Daniel's Avatar
 
Join Date: Jul 2002
Location: Toronto, Canada
Send a message via AIM to Peter Daniel
Default Re: Spring has sprung

Quote:
Originally posted by Ed LaFontaine
Can you provide us with the wire size, turns per inch (or ahem, turns per unit length) and diameter? Those things will go along way towards obtaining similar springs locally. Are your springs closed or open ended?
The springs I'm using presently are 1" diameter:

Click the image to open in full size.

I found them locally in Brofasco, they are pretty stiff (compress no more than 0.1" under load). The damping material inside is SPECDYN- 56061 Deflex Sheet from Partsconnexion.
__________________
www.audiosector.com
Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it. - JC
  Reply With Quote
Old 6th May 2008, 02:29 PM   #837
hayenc is offline hayenc  United States
diyAudio Member
 
hayenc's Avatar
 
Join Date: Apr 2005
Location: Glendale, AZ
Send a message via Yahoo to hayenc
Quote:
This thing sounds really good.

Kevin,

We definitely agree on that one. I had built a little divider off the 6 v supply to bias the transistor and turn on the relay and other voltages, but it appears I must not have loaded the 8 v reg enough in testing, or I had a premature cap failure that took out the reg. Either way, at least the transport was not really hurt and this thing does sound really good.

Will play with caps once the order shows up.

Craig
  Reply With Quote
Old 6th May 2008, 06:41 PM   #838
diyAudio Member
 
luvdunhill's Avatar
 
Join Date: Jul 2006
just ordered some of that damping material, believe it or not... now, need to find some springs
  Reply With Quote
Old 6th May 2008, 07:55 PM   #839
diyAudio Member
 
JC Fardo's Avatar
 
Join Date: Jun 2002
Location: Sao Paulo - Brazil
Quote:
Originally posted by audio1st
Just finished installing the display (stressful). I would recommend you build the enclosure big enough to fit the original board in.

Not up to Peters standard, mostly Panasonic FC's used throughout. Haven't changed the oscillator yet, can't seem to find the right frequency in UK. Used a Vishay 1830 for the 10nF. Digital out resistors are old, no idea of make, non magnetic 110r and 110r. Used a white LED with 4.7k for display, connected before voltage regulator. Switches are (ON) OFF (ON) type for Play-Stop and Next-Prev. The top is part of a circular, bamboo chopping board. Base was a photo frame.
I must say it sounds really good to me in my humble system.
Thanks again to Peter for all his testing and info

audio1st

Congratulations. Nice bamboo job.

Please inform:

What is "photo frame" . Im not familiar to this expression
Did you use springs under mechanism?
What is total height, floor to clamp of your player?
Thanks
__________________
JC
  Reply With Quote
Old 6th May 2008, 07:58 PM   #840
diyAudio Member
 
luvdunhill's Avatar
 
Join Date: Jul 2006
Quote:
Originally posted by JC Fardo
What is "photo frame" . Im not familiar to this expression
a picture frame, or something that decorates the perimeter of a photograph or artwork.
  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 12:08 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