New TK2050 board - Page 88 - diyAudio
Go Back   Home > Forums > Amplifiers > Class D

Class D Switching Power Amplifiers and Power D/A conversion

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 October 2010, 05:10 PM   #871
Frenkel is offline Frenkel  Netherlands
diyAudio Member
 
Join Date: Sep 2010
Oeeh my T3's arrived.
When i connect the 2 MONO boards together at the same rectifier, The fuse blows.

Is it the problem that you can磘 connect 2 at the same rectifier ?

Seperately (not together at the same time) they Work perfect, sounds nice, but at high volume the bass lacks, (woofer goes out off controll).

Rectifier is a 350VA 35 volt, so that would be enough for simple testing.
Speakers are large missions 250 watt.

Does annyone know why this happens ?
  Reply With Quote
Old 8th October 2010, 05:49 PM   #872
Frenkel is offline Frenkel  Netherlands
diyAudio Member
 
Join Date: Sep 2010
I bought 2 SMPS, than the problem will be solved i hope.

Does the T3s need more cooling ? fan etc?
Now start looking for housing for the amps, does sombody know something nice?

Frank
  Reply With Quote
Old 9th October 2010, 01:36 AM   #873
zlab is offline zlab  Hong Kong
diyAudio Member
 
Join Date: Jul 2009
Thanks, It seen that it have been updated to :
hifimediy 100瓦功放板v2.0 单电源T类数字功放 可车用 - 淘宝网

Last edited by zlab; 9th October 2010 at 01:39 AM.
  Reply With Quote
Old 10th October 2010, 04:27 AM   #874
zlab is offline zlab  Hong Kong
diyAudio Member
 
Join Date: Jul 2009
Quote:
Originally Posted by zlab View Post
新100瓦 单电源T类数字功放板 车用 - 淘宝网
  Reply With Quote
Old 10th October 2010, 10:43 AM   #875
zlab is offline zlab  Hong Kong
diyAudio Member
 
Join Date: Jul 2009
I have try using Panasonic FC cap 2200u in 4 + RIFA PEG124 2200u in 4 have excellent result on a TA2022. The capicitors is seperate in 2 rails by using hi-speed diodes. The inpust cap is change to RIFA 3.3uF 250V PHE450 MKP for just USD 2.50 each ... much better than the same one using here. The Goal is try to increase channel seperation and also the sound quality is better to using elan LP6 series. Also I found people is strongly againist using air coil in the output stage filter due to a lot of reason. Apart from radio interference to the enviourment, is it a good choice here? I have seen a lot of famous speaker using air coil for filter purpose.
  Reply With Quote
Old 10th October 2010, 11:46 AM   #876
diyAudio Member
 
Join Date: Oct 2009
Quote:
Originally Posted by Frenkel View Post
Oeeh my T3's arrived.
When i connect the 2 MONO boards together at the same rectifier, The fuse blows.

Is it the problem that you can磘 connect 2 at the same rectifier ?

Seperately (not together at the same time) they Work perfect, sounds nice, but at high volume the bass lacks, (woofer goes out off controll).

Rectifier is a 350VA 35 volt, so that would be enough for simple testing.
Speakers are large missions 250 watt.

Does annyone know why this happens ?
Hi, if they work without problem seperately, I think you'd better check the fuse, or rectifier. It's ok to use 2 mono boards together, but make sure the fuse or rectifier is strong enough.
And if the PSU is weak, you may not get high power output.
  Reply With Quote
Old 10th October 2010, 11:58 AM   #877
diyAudio Member
 
Join Date: Oct 2009
Quote:
Originally Posted by Frenkel View Post
Some people were talking about adding more caps in the T3 Power board, if you`re not using an SMPS


-Im not goeing to use an SMPS, but big 34,5v transformator.

-Should i add more or is it not really nessesarry?

-What would change if the caps were increased ?

-And if i would, by how much uf. would i have to increase them?

Frank
Hi, increasing the caps on PSU is good for transformer usage. But it's not means the larger the better.
For T3, if you have a big transformer, less caps will work good too. may be you can try to measure the DC voltage on caps to see if it's stable or not, and increase the caps if necessary.
Some times large caps will kill transformer too, or make it very unstable when power on.
  Reply With Quote
Old 10th October 2010, 01:41 PM   #878
alkasar is offline alkasar  France
diyAudio Member
 
Join Date: Jan 2009
Location: near Paris, France
Quote:
Originally Posted by hifimediy View Post
Some times large caps will kill transformer too, or make it very unstable when power on.
you mean because of inrush current in the caps or something else ?
  Reply With Quote
Old 10th October 2010, 01:49 PM   #879
diyAudio Member
 
Join Date: Jan 2008
Alkasar qui se dit : j'ai peut-阾re flingu mon LM4780 en lui collant des grosses capas de filtrage, sans snubber qui plus est

Give it a second chance by replacing big caps by the original 1500礷 cap.... the huge difference you found between TK2050 and LM4780 is strange.
  Reply With Quote
Old 10th October 2010, 04:09 PM   #880
diyAudio Member
 
Join Date: Sep 2004
Location: North Carolina,
Default Changing input caps

I am thinking of changing input caps
on V 1.1b do you guys have any suggestions
of what to use,I have got to tame the highs
they are just to bright. what are the values of these caps.
  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
Sure electronics 4*100 watt @ 4ohm, TK2050 D-class Audio Amplifier Board aquapiranha Class D 3 30th May 2011 11:06 PM
Any input on the new Dayton TK2050? finnbow Class D 10 2nd May 2011 11:37 PM
Parallled tk2050/st505 paolo66 Class D 1 24th November 2009 05:10 PM
New Sure electronics TK2050 T-amp xaudiox Class D 2 8th May 2009 07:50 AM
Tripath TK2050 Eccu Digital Source 0 19th April 2002 11:06 AM


New To Site? Need Help?

All times are GMT. The time now is 09:29 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