"The Wire" Ultra-High Performance Headphone Amplifier - PCB's - Page 123 - diyAudio
Go Back   Home > Forums > Amplifiers > Headphone Systems

Headphone Systems Everything to do with Headphones

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 8th January 2012, 03:23 AM   #1221
qusp is offline qusp  Australia
diyAudio Member
 
qusp's Avatar
 
Join Date: Oct 2009
Location: Brisbane, Australia
Quote:
Originally Posted by ilardi View Post
Thanks CafeNoir and qusp. Those instructions are very helpful. I've also been hoping to play with the LT1963A and 1764 but frankly have been holding off due to my concerns about soldering them. BTW, any possibility those layouts -or better yet the PCBs-could be made available? Could be very handy. (and my bench is probably in worse disarray than yours).

Thanks again to both of you.

Terry
no problem Terry, to elaborate, make sure to add flux to the whole pad underneath the part. the regulator, unlike the wire has large vias punched through the pad to allow soldering from underneath as well. once they are stuck down, only an oven is going to get them off, so make sure placement is good and i would probably recommend soldering at least 2 of the pins before moving on the large tab.

not my layout to give i'm afraid, i collaborated with Tom (Natonrice) to get something useful to both of us that fulfilled each of our parts fetiches and we went halves in the cost, but the layout is his. having already given a couple away, i'd rather keep what i have left (~13 regs) for myself; sorry the latest run of builds are very densely populated, thus the need for such a handy compact, high performance reg in the first place

Quote:
Originally Posted by Wolfsin View Post
Wolfsin feelzSlightly more relaxed now about allowing others to glimpse his lousy soldering :-) A messy desk is a sign of an orderly mind!

@ilardi -- pls post pix of yours so we can all feel better.
hey!! workshop = chaos, soldering is generally fastidious. at least there is only parts from 2 broad ranging projects on there at the moment. it gets cleared off for any substantial build, but small ones tend to accumulate.

but yes i'm all for someone else showing their mess to make me feel better

Quote:
Originally Posted by tankcircuitnoise View Post
With copper foil having 0.000498 ohms/square
for 1-ounce/foot^2 foil, a substantial current
that chooses to use the headphone amp as a
path could degrade the signal quality.

1 amp from some stepper motor would induce
498 microVolts into any square of copper the
current flows thru, and such particles will use
all possible paths, proportional to conductance.

Two vias of diameter 0.06" (round), separated by
0.06" spacing will have ~ 1 square of foil resistance between
them. If those vias are the two ends of the 1amp
current, the vias would be 498 uV apart.
Thus Ground indeed is Just a Cruel Joke.
human techno babble/performance art/spam?

lucky we are using 2oz copper and no stepper motors with the boards characterised with lower noise than an AP2 can measure hey?

Last edited by qusp; 8th January 2012 at 03:26 AM.
  Reply With Quote
Old 8th January 2012, 05:02 AM   #1222
ilardi is offline ilardi  United States
diyAudio Member
 
Join Date: Mar 2006
Location: Westchester County, NY
This is actually kind of neat.

Terry
Attached Images
File Type: jpg IMG_0065.jpg (878.8 KB, 356 views)
  Reply With Quote
Old 8th January 2012, 06:12 AM   #1223
qusp is offline qusp  Australia
diyAudio Member
 
qusp's Avatar
 
Join Date: Oct 2009
Location: Brisbane, Australia
yeah thats not bad. i need to get some of those large parts organisers you have there rather than the portable type i'm using combined with stuffing things in cupboards, i'm building some simple dowel racks for the kilometres of wire that should free up quite a bit of space. first of all though, is dedicating the next few months to finishing off current projects including casework, before taking on any more.....
  Reply With Quote
Old 8th January 2012, 06:30 AM   #1224
qusp is offline qusp  Australia
diyAudio Member
 
qusp's Avatar
 
Join Date: Oct 2009
Location: Brisbane, Australia
Quote:
Originally Posted by jdkJake View Post
Um, pardon?

And your point is exactly? I must be missing something.
methinks if there ius any sense to be taken from it at all, perhaps he takes us for people who dont realise ground is simply a concept we use to measure the signal flow against. a flawed concept? perhaps, but it mostly fulfils its purpose provided you remember its simply the same current that flows through the rest of the circuit and comes with all of the same rules. i notice he/it didnt proffer an alternative or choose a source of ripple that actually had some relation to the project at hand. a 1A stepper motor? yeah real relevant....

Last edited by qusp; 8th January 2012 at 06:33 AM.
  Reply With Quote
Old 8th January 2012, 12:08 PM   #1225
diyAudio Member
 
Join Date: Oct 2011
Location: North West, UK
Blog Entries: 7
Managed to create some free time to put together my SE-SEversion of The Wire... this is my very first smd build and only my third build total, so please forgive my crappy soldering The diodes and heatsink pins were a pain in the bum, but I got there in the end

Click the image to open in full size. Click the image to open in full size.

I have the case & cabling ready to go, but have yet to order the triodal, volume pot and a few other little bits...

C&C's very welome...
__________________
Listening with Gusto!

Last edited by BuildMeSomething; 8th January 2012 at 12:18 PM.
  Reply With Quote
Old 8th January 2012, 02:06 PM   #1226
Wolfsin is offline Wolfsin  United States
diyAudio Member
 
Join Date: Aug 2009
Blog Entries: 2
Default Um, pardon?

When 'it' landed, before anyone responded, I felt like a great ape in 2001 glimpsing the monolith. I started to respond but no opening line could ever have equaled that repeated in the title of this post. This thread has given me so many things but that was my first ROTFLMAO!

@BuildMeSomething -- you can solder for me anyday. Good work.
  Reply With Quote
Old 8th January 2012, 02:55 PM   #1227
diyAudio Member
 
Join Date: Jan 2012
I'm a newbie to "diyaudio". As people mentioned (undesired)currents flowing
through the audio system, some past experience and computations,
and good results, came to mind. So I wrote to share.

Various engineering managers stated "electrons take the shortest path".
Yet electrons take all possible paths, proportional to conductance,
and that means (for acceptable fidelity) that all interferrers and all paths
should be considered.

A 1amp speaker current, with 1mA taking a sneak path through the PCB, will
generate 1mA * 0.0005 ohm = 0.5uV. If in a preamp, well, you folks know the issues.

And any "square" of standard copper foil, of any size, has that 0.0005 ohm
resistance. Thus we can sketch out sneak paths, examine the various parallel
conductances, and compute (granted approximately) the interferrence.

Being able to think about PCBs as non-zero resistances, as grids of resistors,
helped me to some sucessful low-trash 22-bit ADC + microprocessor circuits.

Now, back to reading hundreds of legacy posts on diyAudio. Its a candy store.
  Reply With Quote
Old 8th January 2012, 03:25 PM   #1228
Wolfsin is offline Wolfsin  United States
diyAudio Member
 
Join Date: Aug 2009
Blog Entries: 2
My apologies for thinking 'it' was a joke, @tankcircuitnoise
__________________
'gardz, Dick
  Reply With Quote
Old 8th January 2012, 04:52 PM   #1229
qusp is offline qusp  Australia
diyAudio Member
 
qusp's Avatar
 
Join Date: Oct 2009
Location: Brisbane, Australia
haha wow i didnt expect a reappearance, my apologies too; given it seemed to be one of, if not THE first post from your username given the join date and tbh i just failed to see any specific relevance or helpfulness given at this stage, long ago the board and these aspects have already been tested and ruled out on an audio precision system; if they were a concern, the layout has removed the concern to well beyond what is needed for a headphone amp.

it just read to me as some sort of human driven, troll-like targeted though somehow obtuse spam or internet performance art. if the comments were aimed at the pcb hacking going on, then sorry i dont think wolfsin cares about the difference in reference/ground voltage, given the drop caused by current pulses across the ground plain. its a hack, totally for fun.
  Reply With Quote
Old 8th January 2012, 06:00 PM   #1230
Wolfsin is offline Wolfsin  United States
diyAudio Member
 
Join Date: Aug 2009
Blog Entries: 2
Quote:
Originally Posted by qusp View Post
i dont think wolfsin cares about the difference in reference/ground voltage, given the drop caused by current pulses across the ground plain. its a hack, totally for fun.
Amen. I try to be as silly and carefree as a typical software geek, by contrast to the total seriousness of those around me.

My admiration is nearly unlimited for practioners of the black art of analog.
  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
Which Pass Aleph diy board for "no-cost-object" headphone amplifier? Hammerklavier Headphone Systems 43 7th August 2010 03:35 PM
Improvments to "Tube Headphone Amplifier/Preamp with Relay-Based Input and Power Swi" kipman725 Headphone Systems 4 17th August 2009 06:12 PM
Project 11.1 from Slone "High-Power Amplifier" Book Karl71 Solid State 46 6th October 2008 03:47 AM
The "Freebird" ultra clean ultra simple preamp design Russ White Chip Amps 87 11th August 2008 09:28 AM
My A.N.T. "Amber" headphone amplifier x-pro Headphone Systems 8 1st October 2007 08:47 AM


New To Site? Need Help?

All times are GMT. The time now is 12:48 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