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

Class D Switching Power Amplifiers and Power D/A conversion

TPA3250 somebody is listening?
TPA3250 somebody is listening?
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 13th August 2018, 05:02 PM   #661
Cardone is offline Cardone
diyAudio Member
 
Join Date: Aug 2018
Location: Germany
Default I'm new and greet everyone

Hello everyone
After reading all 66 pages a FXAUDIO FX502SPRO TPA3250 ordered + 2x LME49720NA .....
I have to say that the sound is very good ....
Moodeaudio is installed.....
Attached Images
File Type: jpg Regal.jpg (666.2 KB, 128 views)

Last edited by Cardone; 13th August 2018 at 05:11 PM.
  Reply With Quote
Old 13th August 2018, 06:32 PM   #662
chermann is offline chermann  Austria
diyAudio Member
 
Join Date: Jan 2017
Location: Vienna
Quote:
Originally Posted by meq123 View Post
Thanks to this thread, I went ahead and modified my Amp as per posts by @chermann and @irribeo.

.....
Anyway, all works now, though not had time to do any real listening tests. Thanks again to all.



sorry i was on holidays....
thanks linuxfan for your very good explanation.


Very well done Meq123. good job.


chris
  Reply With Quote
Old 13th August 2018, 06:33 PM   #663
chermann is offline chermann  Austria
diyAudio Member
 
Join Date: Jan 2017
Location: Vienna
Quote:
Originally Posted by Cardone View Post
Hello everyone
After reading all 66 pages a FXAUDIO FX502SPRO TPA3250 ordered + 2x LME49720NA .....
I have to say that the sound is very good ....
Moodeaudio is installed.....

jop...the soud and price ratio is very good.....
  Reply With Quote
Old 14th August 2018, 08:51 AM   #664
petersv is offline petersv  Norway
diyAudio Member
 
Join Date: Jan 2018
Quote:
Originally Posted by meq123 View Post
Thanks to this thread, I went ahead and modified my Amp as per posts by @chermann and @irribeo.

I replaced the LM317 resistor with another 0805 surface mount 3k6 and soldered the cap across it - as shown in pic 1. Pic 2 shows the extra heatsink and bypass caps in place. I cut a rectangle from an old (dead) PC PSU heatsink that was the perfect depth, then glued it in place with heatsink epoxy sandwiched with a silicone transistor heatsink pad to isolate it from the PCB. I cut around an existing threaded hole in the heatsink and used that to attach to the bottom of the case (took some very careful measuring to get the hole in the case correctly!).

Anyway, all works now, though not had time to do any real listening tests. Thanks again to all.
Hi all, are these component modifications/swaps advised for everyone using the bundled PSU? I'm running some Dali Suite 2.5 4 Ohm speakers, and it sounds quite ok, and I dont have any problems or error lights.

Last edited by petersv; 14th August 2018 at 08:55 AM.
  Reply With Quote
Old 14th August 2018, 10:25 AM   #665
chermann is offline chermann  Austria
diyAudio Member
 
Join Date: Jan 2017
Location: Vienna
Quote:
Originally Posted by petersv View Post
Hi all, are these component modifications/swaps advised for everyone using the bundled PSU? I'm running some Dali Suite 2.5 4 Ohm speakers, and it sounds quite ok, and I dont have any problems or error lights.


hi peter


my personal target for this amp is to use the original psu.= 24V

internal regulator is not correct implemented by fx audio because the setup of lm317 is set to 22,7V and so the regulator is not working. The datasheet requires 3V differents about input and output of the lm317. so the regulator is not working correctly and you might get the "noise" of the psu into your amp.




yes no problems with error light- error light comes if the impedance gets lower than 4 ohms / or if you get undervoltage = psu get down. i tred a test with 2 ohms load...not possible with this psu.



chris
  Reply With Quote
Old 14th August 2018, 11:28 AM   #666
petersv is offline petersv  Norway
diyAudio Member
 
Join Date: Jan 2018
Thanks for the replay Chris. I have some SMD resistors, should I place a 3k6? I see that there is a capacitor as well added to this resistor, what is the purpose of that?
Kind regards, Peter
  Reply With Quote
Old 14th August 2018, 07:45 PM   #667
meq123 is offline meq123
diyAudio Member
 
Join Date: May 2018
Quote:
Originally Posted by petersv View Post
Thanks for the replay Chris. I have some SMD resistors, should I place a 3k6? I see that there is a capacitor as well added to this resistor, what is the purpose of that?
Kind regards, Peter

See post # 522 (TPA3250 somebody is listening?)
  Reply With Quote
Old 15th August 2018, 04:56 AM   #668
chermann is offline chermann  Austria
diyAudio Member
 
Join Date: Jan 2017
Location: Vienna
Thx meq123.
  Reply With Quote

Reply


TPA3250 somebody is listening?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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
MPA 3250 Amp johnmik Solid State 16 10th March 2017 06:50 PM
RD Audio 3250.1 Deadly Sones Car Audio 1 10th July 2013 05:51 PM
RD Audio 3250 V2 S Merlington Car Audio 3 28th February 2013 05:55 PM
What are you listening to? MikeW Pass Labs 36 20th June 2011 01:54 AM
Denon DOA-3250 mike49504 Car Audio 2 12th November 2010 08:17 PM


New To Site? Need Help?

All times are GMT. The time now is 07:41 AM.


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