Go Back   Home > Forums > > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Twisted Pear Superior quality electronic kits

Reply
 
Thread Tools Search this Thread
Old 17th June 2018, 09:40 PM   #11
Russ White is offline Russ White  United States
diyAudio Member
 
Russ White's Avatar
 
Join Date: Jan 2005
Location: Nashville, TN, USA
Try wiring with some plain hookup wire.
__________________
Less pulp more juice Twisted Pear
Audio
/Twisted Pear Audio Blog
  Reply With Quote
Old 17th June 2018, 10:19 PM   #12
MartinC700 is offline MartinC700  United States
diyAudio Member
 
Join Date: Oct 2010
Location: California
Would you use a twisted pair to connect, replacing the u.fl for the MCK?

Also I can post some images of the setup if that would help.
  Reply With Quote
Old 17th June 2018, 10:26 PM   #13
Russ White is offline Russ White  United States
diyAudio Member
 
Russ White's Avatar
 
Join Date: Jan 2005
Location: Nashville, TN, USA
no twisted pair - just a reasonably short single wire - just make sure there is a common GND at some point.
__________________
Less pulp more juice Twisted Pear
Audio
/Twisted Pear Audio Blog
  Reply With Quote
Old 18th June 2018, 11:47 AM   #14
MartinC700 is offline MartinC700  United States
diyAudio Member
 
Join Date: Oct 2010
Location: California
Russ,

Thanks for the guidance, a temporary hook up with a single wire seems to have done the trick! - The connection is too long at the moment so there is an occasional very slight 'click' but I am sure with a hard wired short connection it will be fine.

Why would a single unshielded wire be superior to the u.fl? My only thought as a relative novice to digital stuff is that since there were multiple u.fl connections between the Cronus and the DAC it could be a ground loop issue? If that's the case would it be better to use unshielded wire connections for D1, D2 etc and a single shielded u.fl for the MCK? or perhaps use shielded connections but have the shields on all but one connected only at the source?

Regards
  Reply With Quote
Old 18th June 2018, 01:58 PM   #15
Dimdim is offline Dimdim  Greece
diyAudio Member
 
Join Date: Sep 2008
Location: Athens
Troubleshooting my Cronus/B3SE-PRO
Sounds to me more like a faulty u.fl cable.
__________________
http://www.dimdim.gr
  Reply With Quote
Old 18th June 2018, 02:24 PM   #16
MartinC700 is offline MartinC700  United States
diyAudio Member
 
Join Date: Oct 2010
Location: California
I did try 2 different u.fl cables, one single shielded the other double, both gave the same issue. Before Russ noted not to use a twisted pair connection I tried that and although it was better than the u.fl it still resulted in noise.
  Reply With Quote
Old 18th June 2018, 04:08 PM   #17
Russ White is offline Russ White  United States
diyAudio Member
 
Russ White's Avatar
 
Join Date: Jan 2005
Location: Nashville, TN, USA
I have found that in some cases (not all) uFL can be finicky - I am not sure if it's the cables or the connectors - or some other reason like cable capacitance. I also have found that if I only ground one end of the uFL cable I sometimes get better results than when I ground both (probably because of local HF ground loop). I have cut awaysthe ground shield around one end of the cable to achieve a single ground point in tests.

All in all - I suggest simple hookup wire is often the best solution. Honestly - except in extreme cases - you not really at risk of picking up EMI as much as transmitting it with unshielded wires. And in this case - it's far more important to have a clean signal then to worry about the small emissions.

So my suggestions is - if you are seeing flaky behavior using uFL - use hookup wire. You won't be doing any harm.

Cheers!
Russ
__________________
Less pulp more juice Twisted Pear
Audio
/Twisted Pear Audio Blog

Last edited by Russ White; 20th June 2018 at 03:21 PM.
  Reply With Quote
Old 21st June 2018, 05:33 AM   #18
MartinC700 is offline MartinC700  United States
diyAudio Member
 
Join Date: Oct 2010
Location: California
Well, I guess the problem is still here Hooked up the MCK with a shorter better quality wire (the older long one was a Arduino hook up wire) and the noise is back. Put the Arduino wire back in and it less pronounced but still there.

I still have D1, D2 etc connected via u.fl connectors, tomorrow I will try plain wire for those and see what happens. Running out of ideas here.
  Reply With Quote
Old 21st June 2018, 06:37 AM   #19
MartinC700 is offline MartinC700  United States
diyAudio Member
 
Join Date: Oct 2010
Location: California
Stranger and stranger, switched firmware back to async, and replaced the crystal supply, disconnected the and MCK connector and now all I get is a very faint almost inaudible music level. Giving up for today!
  Reply With Quote
Old 21st June 2018, 12:24 PM   #20
Russ White is offline Russ White  United States
diyAudio Member
 
Russ White's Avatar
 
Join Date: Jan 2005
Location: Nashville, TN, USA
Yes - replace them all.

My suggestion is to try plain hookup wire for all of the signals.
__________________
Less pulp more juice Twisted Pear
Audio
/Twisted Pear Audio Blog
  Reply With Quote

Reply


Troubleshooting my Cronus/B3SE-PROHide 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Cronus - It's about time. Russ White Twisted Pear 723 15th July 2018 07:38 PM
B3SE-Pro experimental dual mono firmware. Crom Twisted Pear 36 2nd July 2018 08:45 AM
FS output stage for B3SE(ES9018) with Lundahl LL1684 and Vishay S102C Foil resistors schultzsch Swap Meet 12 29th June 2018 01:40 PM
FS - Spare Cronus bern Swap Meet 2 18th May 2018 09:26 AM
DSD256 not playing - BBB Hermes, Cronus, B3SE HeadSh0T Twisted Pear 0 8th February 2017 04:04 AM


New To Site? Need Help?

All times are GMT. The time now is 05:56 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki