can someone look this over? - diyAudio
Go Back   Home > Forums > Amplifiers > Headphone Systems
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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
Thread Tools Search this Thread
Old 11th October 2012, 06:41 PM   #1
diyAudio Member
Join Date: Apr 2010
Default can someone look this over?

I wanted to see if this schematic looked right it's not my design, but I wanted to make a new layout With better parts and on board power. My Main question is with the heaters if I have the resistors right there and If I implmented the regulator right to trim the 15 volts to regulated 12 Thanks

Click the image to open in full size.

Last edited by doulos24; 11th October 2012 at 07:33 PM.
  Reply With Quote
Old 12th October 2012, 05:55 PM   #2
diyAudio Member
Join Date: Apr 2010
  Reply With Quote
Old 12th October 2012, 09:50 PM   #3
diyAudio Member
Join Date: Mar 2008
Location: alabama
Default not an expert

I have been playing with LTSpice and decided your power supply would be a good test. i have attached a zip file with your original and my modified one.
I am by no means a expert but the first 317 sims ok (although sim has some ringing), but the second one you would get a voltage drop across the first filament thus having a lower voltage across the second.

in the second circuit i simply moved the 2nd lm317 out from the 1st and adjusted the resistors to give approx 6.3v and separated the two filaments (the best i could find was that when operating they would be about 90 ohms)

BTW i am not sure about the LM317 LTSpice model, it was the first one i found.
Attached Images
File Type: png Screenshot.png (140.3 KB, 67 views)
File Type: png Screenshot-1.png (141.8 KB, 63 views)
Attached Files
File Type: zip (3.4 KB, 4 views)
  Reply With Quote


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

New To Site? Need Help?

All times are GMT. The time now is 05:38 PM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2