Arcam Alpha mods - Page 2 - 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 18th May 2010, 01:58 PM   #11
Thomo is offline Thomo  United Kingdom
diyAudio Member
 
Thomo's Avatar
 
Join Date: Nov 2006
Nice work Simon, liking the offboard psu jobbie.

Don't forget the DEM reclocking.

Cheers, Lee.
  Reply With Quote
Old 18th May 2010, 02:31 PM   #12
SimontY is offline SimontY  United Kingdom
diyAudio Member
 
SimontY's Avatar
 
Join Date: May 2003
Location: Sheffield, North England
Send a message via MSN to SimontY
Default Hardwood cone feet

I've just placed 3 hardwood cones under the player and that has done a world of good. The sound is more three-dimensional and solid, less hard-edged and more dynamic. I love wooden cones, you get so much for next to no cost!
  Reply With Quote
Old 18th May 2010, 02:32 PM   #13
SimontY is offline SimontY  United Kingdom
diyAudio Member
 
SimontY's Avatar
 
Join Date: May 2003
Location: Sheffield, North England
Send a message via MSN to SimontY
Thanks Lee, I won't forget the DEM re-clock - all in good time! I've only had the player a few weeks or so

Simon
  Reply With Quote
Old 2nd August 2010, 09:52 AM   #14
acccruz is offline acccruz  Portugal
diyAudio Member
 
Join Date: Nov 2009
Thanks Simonty for let us know your great job at this really good CD Player.

I bought three last week and will soon make some upgrades: capacitors, NETAudio NOS converter chip, NETAudio Rockclock and RCA output plugs.

Later I will go for power regulators upgrade and toroid (18-0-18?) instead of tx power suply.


Cruz
  Reply With Quote
Old 2nd August 2010, 03:09 PM   #15
Chivvyp is offline Chivvyp  United Kingdom
diyAudio Member
 
Join Date: Apr 2006
Location: London
Quote:
Originally Posted by acccruz View Post
Thanks Simonty for let us know your great job at this really good CD Player.

I bought three last week and will soon make some upgrades: capacitors, NETAudio NOS converter chip, NETAudio Rockclock and RCA output plugs.

Later I will go for power regulators upgrade and toroid (18-0-18?) instead of tx power suply.


Cruz
  Reply With Quote
Old 2nd August 2010, 03:10 PM   #16
Chivvyp is offline Chivvyp  United Kingdom
diyAudio Member
 
Join Date: Apr 2006
Location: London
Quote:
Originally Posted by acccruz View Post
Thanks Simonty for let us know your great job at this really good CD Player.

I bought three last week and will soon make some upgrades: capacitors, NETAudio NOS converter chip, NETAudio Rockclock and RCA output plugs.

Later I will go for power regulators upgrade and toroid (18-0-18?) instead of tx power suply.


Cruz
I wouldn't bother with the NOS converter chip. I bought one and never used it. If you want to go NOS it's as easy to do without the chip, just a few wire links needed.

Pete
  Reply With Quote
Old 3rd August 2010, 01:59 PM   #17
acccruz is offline acccruz  Portugal
diyAudio Member
 
Join Date: Nov 2009
Default Arcam Alpha mods

Many thanks for your advice Mr. Pete about NOS mod. Would you please let me know what pins of SAA7220P/B and TDA1541A need to be linked, and what traces need to be cuted?

Grateful in advance for helping me,
Cruz
  Reply With Quote
Old 4th August 2010, 01:00 AM   #18
acccruz is offline acccruz  Portugal
diyAudio Member
 
Join Date: Nov 2009
Default Arcam Alpha mods

Here what I have done to try my Arcam Alpha 5 in NOS mod:

I desolder the chip SAA7220P/B from board and lift the pins 1,2,3,15,16,18. Then Ive joined the vacated holes with wire: 1 to 18 2 to 16 3 to 15.

After I cut the track between pins 4 to 2 of the TDA1541A chip, and connected the pin 4 to pin 5.

In the end of my work what I have its a CD player motor spinnig round like crazy!!!

I NEED SOME HELP PLEASE :-/

Cruz
  Reply With Quote
Old 5th August 2010, 09:40 AM   #19
Chivvyp is offline Chivvyp  United Kingdom
diyAudio Member
 
Join Date: Apr 2006
Location: London
Quote:
Originally Posted by acccruz View Post
Many thanks for your advice Mr. Pete about NOS mod. Would you please let me know what pins of SAA7220P/B and TDA1541A need to be linked, and what traces need to be cuted?

Grateful in advance for helping me,
Cruz
This is what I did.

Remove the SAA7220 chip completely.

In place of the chip, put wire links from the positions 1 to 18, 2 to 16 and 3 to 15 this routes the signal straight through to the dac.

Then you have to reroute the clock to the SAA7210 chip (I suspect this is the reason for your disc spinning). I don't completeley remember how I did this part, I think you just link the positions 11 and 9 where the 7220 was (routes the clock output through to 7210) and link the position 10 to leg 18 on the 7210 (feeds the drive output to the crystal from the 7210). Please double check this against the datasheets, I haven't done it for a while and I may have some of the references wrong.

An additional connection to get the muting working again is to link position 23 from the 7220 position to leg 11 of the 7210.

If your machine has the SAA7310 "A chip" instead of the SAA7210 the legs mentioned are different, you'd need to check the datasheet for the correct ones.

Hope this helps, regards

Pete
  Reply With Quote
Old 5th August 2010, 09:46 AM   #20
Chivvyp is offline Chivvyp  United Kingdom
diyAudio Member
 
Join Date: Apr 2006
Location: London
Quote:
Originally Posted by acccruz View Post

After I cut the track between pins 4 to 2 of the TDA1541A chip, and connected the pin 4 to pin 5.

Cruz
I don't think you need to do this for NOS. Not sure if it will cause a problem though.
  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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Arcam Alpha 5 cd schematics and mods wanted Chivvyp Digital Source 5 21st March 2010 10:36 AM
Arcam Alpha Plus amc184 Digital Source 6 17th January 2008 06:01 PM
arcam alpha 7 big jim Solid State 3 19th June 2006 11:40 AM
Arcam alpha 9 pumpkin Solid State 0 5th October 2005 06:31 PM
Arcam Alpha 8 ManUtd Digital Source 4 5th April 2004 02:23 PM


New To Site? Need Help?

All times are GMT. The time now is 01:24 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