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

First Linear Power Supply Build Questions
First Linear Power Supply Build Questions
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 19th September 2019, 11:46 PM   #31
LateraLiz is offline LateraLiz  United States
diyAudio Member
 
Join Date: Aug 2019
Quote:
Originally Posted by WhiteDragon View Post
LM338 is pretty straight forward to work with.

just follow the data sheet.

10,000 uf seems excessive
just keep things simple. likewise use a large heatsink

worse comes to worse
you can run 2 in regulators in parallel which allows 10 amp current.
but the idea is to stay with your original design and allow better heat dissipation with 2 devices 2 heatsinks. fan is good idea. might not be needed. otherwise every fan i know of can be turned off and on with a switch.
large heatsink is the easiest

pretty straight forward

headphone amp definitely doesnt need all this voltage and current. but the intention of building a bench supply makes sense.

22 to 25 volt transformer seems feasible. as mentioned smaller transformers tend to have poor regulation. meaning they have higher voltage when not fully loaded
Adding a fan connected to a sensor to manage heat dissipation is really more about learning how to program and implement sensor based features, and feeling fancy about doing so.

As for the comment about a headphone amp not needing all this voltage and current - "need" is highly subjective. You can power planar magnetic headphones directly from a smartphone. Will they sound good? Not really. Planars like power, and I like options. And who knows, maybe at the end of this I'll come to the same conclusion you reached - headphones don't need quite that much power, after all. There's really only one way to find out!

With regards to transformer regulation, after someone brought that to my attention in the above replies, I've narrowed down my options to transformers rated at 9% regulation, and between 30-36volts to avoid the problems you mention. Thanks for the pointers!
  Reply With Quote

Reply


First Linear Power Supply Build QuestionsHide 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
Questions about amp camp amp and linear power supply Jonse Pass Labs 22 17th February 2018 07:37 PM
Op amp Linear power supply Marksd Power Supplies 158 27th January 2018 08:44 AM
Linear DAC power supply jean-paul Analog Line Level 0 30th April 2015 10:53 AM
Help a novice steadily build a linear 12V power supply? SGK Power Supplies 117 27th May 2014 07:38 AM
Tubelab SE build and power supply questions. Binaural Tubelab 54 3rd March 2010 03:20 AM


New To Site? Need Help?

All times are GMT. The time now is 06:17 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright ©1999-2019 diyAudio
Wiki