A New Take on the Classic Pass Labs D1 with an ESS Dac - Page 88 - diyAudio
Go Back   Home > Forums > Source & Line > Digital Line Level

Digital Line Level DACs, Digital Crossovers, Equalizers, 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 28th January 2012, 07:47 PM   #871
opc is offline opc  Canada
diyAudio Member
 
opc's Avatar
 
Join Date: Oct 2004
Location: Ottawa, Ontario, Canada
Very nicely done! Wow!

You must have a pretty decent home etching setup!

Post some pictures with the completed unit when you get it all done. I'd very much like to see how it turns out.

Cheers,
Owen
  Reply With Quote
Old 29th January 2012, 01:45 AM   #872
qusp is offline qusp  Australia
diyAudio Member
 
qusp's Avatar
 
Join Date: Oct 2009
Location: Brisbane, Australia
i would not use te 0.97.5-99s parts or at least retest. i did not get anything this high testing 150+ devices, my guess looking at those numbers is that low and fluctuating temperature has played a part, as overall mine were grouped closer than that. maybe you got a batch that was particularly high, but it seems unlikely. in fact even .95,96 was only encountered in error in a few which was lower when retested. particularly since you have some that are very low by my group too

nice work on the PCB, looks good!

Last edited by qusp; 29th January 2012 at 01:51 AM.
  Reply With Quote
Old 29th January 2012, 02:40 PM   #873
diyAudio Member
 
Algar_emi's Avatar
 
Join Date: Oct 2002
Location: Canada, Qc
The FET was getting barely warm with 24V on R1. R1 was much hotter. Maybe my heatsink was too big and the FET wasn't warming up enough. I'll retest in the actual circuit with the cut to lenght heatsink.
  Reply With Quote
Old 29th January 2012, 09:18 PM   #874
diyAudio Member
 
Algar_emi's Avatar
 
Join Date: Oct 2002
Location: Canada, Qc
PCB almost completed. Still missing the parts from Mouser.
Attached Images
File Type: jpg Img_6540.jpg (132.0 KB, 481 views)
  Reply With Quote
Old 30th January 2012, 12:12 AM   #875
diyAudio Member
 
Algar_emi's Avatar
 
Join Date: Oct 2002
Location: Canada, Qc
Hi. I'm still not ready to sell any match pairs. As I said on the post, I want to retest all of them in the actual circuit first. It may take me 1-2 weeks before I'm ready. I'll post it here when I'm ready. I won't warranty anything, because I want to be sure you'll get two good pairs. BTW I'll accept PayPal with 3% fee, and yes I'll ship worldwide.

Thanks...
  Reply With Quote
Old 30th January 2012, 11:30 PM   #876
diyAudio Member
 
Algar_emi's Avatar
 
Join Date: Oct 2002
Location: Canada, Qc
Output coupling capacitor question: The final schematic is showing 1800uF electrolytic output cap, in parallel with the 22uF film cap. Do I need these electrolytic caps? Tx. Original D1 used 220uF bypassed by 0.047uF film.

Last edited by Algar_emi; 30th January 2012 at 11:41 PM.
  Reply With Quote
Old 31st January 2012, 12:00 AM   #877
qusp is offline qusp  Australia
diyAudio Member
 
qusp's Avatar
 
Join Date: Oct 2009
Location: Brisbane, Australia
no, these are optional in case someone wants to save a bit of cash i guess. just use the film sized to give best 3db point vs your amps input Z, i'm using 4.7uf auricap bypassed with 0.1u copper/ptfe
  Reply With Quote
Old 31st January 2012, 12:03 AM   #878
diyAudio Member
 
Algar_emi's Avatar
 
Join Date: Oct 2002
Location: Canada, Qc
Tx
  Reply With Quote
Old 6th February 2012, 12:27 AM   #879
diyAudio Member
 
Algar_emi's Avatar
 
Join Date: Oct 2002
Location: Canada, Qc
Almost ready to start mounting everything into an enclosure. I recycled a Cambridge Audio DVD that I had and stop to work years ago. I removed all the junk from it, and this will make a nice case.

I kept the player small headphone amplifier output PCB. I'll connect it to the single ended output. It is probably not good, but at least the front panel will look perfect.

You can see the Antek power transformers, the D1 and its heatsinks, the original Twisted Pear Ballsie balanced to single-ended converter, their LCBPS bi-polar supply for the Ballsie, and my small TentLabs 6.6V shunt reg for the ESS Dac Va supply.

It should all fits nicely.
Attached Images
File Type: jpg IMG_6569.JPG (189.8 KB, 390 views)
  Reply With Quote
Old 7th February 2012, 05:04 PM   #880
Just DIY!
diyAudio Member
 
pinnocchio's Avatar
 
Join Date: Sep 2010
Location: Montreal
Default Me wants boards!

Hi Owen,

Please put me down for 2x NTD1 PCBs

Any marched mosfets left?

Ciao!
Do
__________________
PREAMPs : AMB α10 + JC-80 clone | Balanced DCB1 | LDR3x | AMPs: AMB β24 | Aleph 5 | VSSA | ML-2 | Fetzilla | Telos 390 Clone | My_Ref FE
DACs : TPA Buffalo II + OPC's NTD1 I/V | TPA OPUS + IVY III Speakers : Jim Holtz Statements | Astasia SD | Tubasson Mark 2
  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
Pass Labs S/Ns ? dejanm Pass Labs 8 26th January 2007 07:35 AM
My opinion on Pass Labs and Mr. Pass (Nelson) himself b_online Pass Labs 11 21st May 2003 12:39 AM


New To Site? Need Help?

All times are GMT. The time now is 11:48 PM.


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