Marantz CD-50 and CD-60, TDA1541, CDM4/19 - Page 63 - 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 5th March 2013, 08:02 PM   #621
diyAudio Member
 
Join Date: Jun 2012
Thank you UV101 and Antonio,
This is still a work in progress, too bad that the pictures I posted are so small, I really tried to make it look good, as well as sounding good
UV101, the next step on the list is to replace the small caps under the TDA1541 because I already have them, I am just enjoying it as it is now before the next upgrade.
After that I will install a new clock like the one you describe, with a dedicated transformer in an outside box, where I already have a mains filter. I am still deciding if I will put the rectification there, or near the clock.
I already had your pdf about clocks, and must thank you (and the other other members on this thread) for being the inspiration for my project. It took me a few days to read all the posts, but it was very educative
António, for this project I used the LME49720HA opamps, with dedicated regulators and Mundorf output caps, my next TDA1541 project (maybe another CD50 if I can find one cheap) will feature a very nice valve output I was thinking on those small tubes like the ones you used in yours. Where did you get the transformer?
I will try to post the pictures again

Click the image to open in full size.


Click the image to open in full size.


Click the image to open in full size.


Click the image to open in full size.

Click the image to open in full size.


Ricardo
  Reply With Quote
Old 5th March 2013, 10:05 PM   #622
acccruz is offline acccruz  Portugal
diyAudio Member
 
Join Date: Nov 2009
Hi Ricardo:


I have also the LME49720HA. I agree it will sound acceptable, good mids and bass, but the highs are sterile and tiring.

Nothing compares to tubes! Until today I tried as TDA1541 output stage Amperex 6922, 6N2P-EV and 6N16B.

The last ones are the winner!

You can get the transformer needed (180V and 6,3V) at eBay, at Mr. Fikkuz, at Transformatorspecialist, or elsewhere!

If you have any questions please ask!

King regards,
Antonio
Attached Images
File Type: jpg DSC_4416_.jpg (27.2 KB, 56 views)
  Reply With Quote
Old 11th March 2013, 07:56 PM   #623
diyAudio Member
 
Join Date: Jun 2012
Hi Antonio,
Thank you for the site with the transformers, when I start my tube project I will need at least one
What kind of capacitors you use as DC filters in the output?
I am using Mundorf now.. And recommend.

Best regards
Ricardo
  Reply With Quote
Old 15th March 2013, 10:07 PM   #624
acccruz is offline acccruz  Portugal
diyAudio Member
 
Join Date: Nov 2009
Hi Ricardo:

I sitll have in hands some Munford Silver Gold. It are indeed very very good output capacitors but please try russians MBM 1uF (or 1uF + 1uF) bypassed with FT-1 2000pf (teflon) and I´m sure you will be without words with what you can get wiht this conjugation - it seems there is no coupling capacitor! the music simply is like a river alive, fresh and free! But you have to let them burn around 200 hours or more...

IMHO it´s impossible to beat regarding the price (4 capacitors around 5 or 6 euros). Luckas Fikus says you only get more 5% if you jump to Mundorf Silver Gold Oil, Jensen, or Audionote, and I admit he is right!

I hope it encorage you to not be biased with brands. Please open your mind to what Russia have to offer for music at very low prices, and save your money!

The best for you,
Antonio
  Reply With Quote
Old 21st March 2013, 11:45 PM   #625
UV101 is offline UV101  England
diyAudio Member
 
UV101's Avatar
 
Join Date: Dec 2008
Location: Oxford
Quote:
Originally Posted by acccruz View Post
Hi Ricardo:


I have also the LME49720HA. I agree it will sound acceptable, good mids and bass, but the highs are sterile and tiring.
Not with the right power supply and decoupling
__________________
When Bitstream came out, I thought, “my God, what are we going to do...?” Ken Ishiwata http://www.hifisounds.co.uk
JA-88D Class A, Audio Aero Capitole MKII, Focal and Kimber "Leave Nothing as Standard"
  Reply With Quote
Old 13th February 2015, 11:21 PM   #626
Stabby is offline Stabby  Belgium
diyAudio Member
 
Join Date: Sep 2010
Sorry for the bump, I just finished reading this entire thread to prepare for modding my Philips CD620 and CD710. Just wondering what happened to Mayday? He stopped updating and hasn't logged in since 2012. I hope he's okay.

Last edited by Stabby; 13th February 2015 at 11:24 PM.
  Reply With Quote
Old 14th February 2015, 01:20 AM   #627
diyAudio Member
 
Join Date: Jul 2011
Location: Prior Lake, MN
Quote:
Originally Posted by Stabby View Post
Sorry for the bump, I just finished reading this entire thread to prepare for modding my Philips CD620 and CD710. Just wondering what happened to Mayday? He stopped updating and hasn't logged in since 2012. I hope he's okay.
Hi Mayday is fine. He is taking a break from DIY at the moment.
  Reply With Quote
Old 14th February 2015, 03:33 PM   #628
Stabby is offline Stabby  Belgium
diyAudio Member
 
Join Date: Sep 2010
Good to hear

About my own mods, I can do all the basic stuff but later on I might need some help with seperate regs and clock mod. Is there anyone who could help me with this stuff?
  Reply With Quote
Old 15th February 2015, 01:42 PM   #629
acccruz is offline acccruz  Portugal
diyAudio Member
 
Join Date: Nov 2009
Default Marantz CD-50 and CD-60, TDA1541, CDM4/19

Well, may I can help a little. Please ask your questions.

Go ahead with the mods!

In the end you will have a CD player that can compete with the big ones.

Regards,
  Reply With Quote
Old 15th February 2015, 02:06 PM   #630
Stabby is offline Stabby  Belgium
diyAudio Member
 
Join Date: Sep 2010
Thanks! Here's what I've got so far:

- Replace all lytic bypass caps (DAC/decoder/filter/Opamps) with 100uF Nichicon FG 25V on analogue rails and with 100uF Nichicon R7 polymer caps on digital rails + replace ceramic caps next to these with 100nF Wima MKS2.
- Replace prereg lytic caps with higher value Nichicon PW
- Postreg caps in PSU: 470uF Nichicon FG
- DC blocking caps: Wima MKS4 4.7uF (though 1uF or 2.2uF would be fine too?)
- Replace 1N4002 diodes with UF4002
- 180pF silver mica for DEM cap
- Replace Opamps
- Regulators: put LM317 (on small veroboard) at +5V power pins of DAC and filter (in place of supply resistor), LM337 at -5V and -15V power pins of DAC. Attach sizable heatsink to LM317 at filter.
- Maybe put in LM7805/7905 at decoder just to get its noise from the main rail?

Any remarks here? I'm especially curious if 100uF is fine for all the bypass caps instead of 470uF.

Later on I will replace the LM317/337 at the DAC/filter with separate PSU + TPR. I know how to do that thanks to all the information in this thread. The final step would be a clock upgrade but I'm a bit clueless on that one.

Last edited by Stabby; 15th February 2015 at 02:23 PM.
  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
Marantz CD-40 (TDA1541A & CDM4): need help! Malefoda Digital Source 1 29th December 2009 03:29 PM
FREE Marantz CD-50 SE metal-plastic chassis (CDM4 based) honinbou Swap Meet 0 7th June 2009 03:34 PM
Tube stereo for E 60 including TDA1541 cd player Westerp Tubes / Valves 3 27th April 2009 03:04 PM
FS: Ariston CD1 cd player, CDM4/19 + TDA1541A(si)+OPA627BP mudihan Swap Meet 13 6th July 2006 05:24 AM
CD-RW on CDM4/19 players.... Lyra Digital Source 3 25th May 2004 07:02 PM


New To Site? Need Help?

All times are GMT. The time now is 02:36 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2015 DragonByte Technologies Ltd.
Copyright ©1999-2015 diyAudio

Content Relevant URLs by vBSEO 3.3.2