New TK2050 board - Page 97 - 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 28th October 2010, 07:50 AM   #961
diyAudio Member
 
Join Date: Jan 2010
Default Questions

I have a few newbie questions, if someone would be so kind to answer.
Can I put the v1 amp in a wood case? Is it possible to severe the on/off switch from the board and connect wires to the switch, once atached to my new casing? Same with volume pot? Internal wiring for the rca and speaker terminals: Can I use speaker cable for the speaker terminals? What sort of cable is ok for the rca terminals? I bought the HP C7296-60043 AC/DC sps for my power supply and would like to use the connected cable with a dc plug at the end. Does anyone know, which kide of dc jack would I need for it? I know I have asked a lot of questions and I have already scoured several threads to find the answers and haven't had any luck.

Any help would be really appreciated. Thanks
  Reply With Quote
Old 28th October 2010, 09:27 AM   #962
diyAudio Member
 
Join Date: Oct 2009
Quote:
Originally Posted by Havoc08 View Post
Hifimediy it is not a question of more wattage, but it would be nice to have a better damping factor. This is not possible with v2 amp (to use the STA510A)?
sure, we can do that.
  Reply With Quote
Old 28th October 2010, 09:28 AM   #963
diyAudio Member
 
Join Date: Oct 2009
Quote:
Originally Posted by Havoc08 View Post
Should have quoted this also for context.

Is the heatsink removable or glued on? I don't mind swapping it for a better one if I can get the STA510A then?
We use same and removable heatsinks on v1 and v2.
  Reply With Quote
Old 28th October 2010, 09:30 AM   #964
diyAudio Member
 
Join Date: Oct 2009
Quote:
Originally Posted by zeeuw View Post
Hello

are the Hifimediy amps also suited for driving 16 ohm speakers?
If so which board is best?

Sander
For 16ohm, T3 is the best (will give more power than other). And v1 is also a good choice if you don't care about power.
  Reply With Quote
Old 28th October 2010, 09:33 AM   #965
diyAudio Member
 
Join Date: Oct 2009
Quote:
Originally Posted by ericg View Post
Hi Steinar, can you please tell me if the switch on V1 board is switching directly power or is it switching the power relay?
I want to relocate it on the front of my case but I need to know which kind of switch I have to order (current rating mainly).

Thanks in advance,

Eric
Eric
Switch control the relay, about 15mA needed.
  Reply With Quote
Old 28th October 2010, 09:46 AM   #966
diyAudio Member
 
Join Date: Oct 2009
Quote:
Originally Posted by benoar View Post
OK, thanks for these informations. Nice to knom the relays resistor will be changed. But will you adapt the feedback resistors too, as I wondered earlier ? If I go for 36V Vcc, with 1kOhm Rfbb we must have 17kOhm Rfbc. Or maybe another combination since 17kOhm may not be easily available. This will also increase a bit the gain; should I also compensate for it by decreasing Rf ?

About the gain, I was always puzzled looking at the 1.5V input sensitivity of TC2000. But now, I may have found why: the datasheet says the output of TC2000 should be driven up to 4Vpp. With a unity gain on the input stage, which is biased at 2.5V this leaves a 1.5V headroom, our input sensitivity ! Am I wrong on that ?

This make me think : with common 2V line input voltage, shouldn't we decrease a bit the input gain ? Like making Rf 15kOhm ?

Maybe you already thought about that, I am just trying to understand better your schematics…
Right, we will change the Rfbc as we do on T3. 1.5V is the maxium input sensitivity of TC2000, make sure not exceed this voltage will keep THD low. And we will get 1.5V*15=22.5V with Rfbc=14kohm and Rfbb=1kohm, that's enough for 100W@4ohm output. And we always suggest a potmeter or an attenuation before input to limit the input signal for TC2000 not too big, so it's not necessary to change feedback resistors.
  Reply With Quote
Old 28th October 2010, 01:55 PM   #967
ericg is offline ericg  France
diyAudio Member
 
Join Date: Aug 2010
Quote:
Originally Posted by hifimediy View Post
Switch control the relay, about 15mA needed.
Many thanks!
  Reply With Quote
Old 28th October 2010, 02:33 PM   #968
diyAudio Member
 
Join Date: Mar 2006
Location: Cheshire
Hi

I hope that this is not a rude question for this thread:

Has anyone compared this amp module to the Hypex units? I am torn between the hifimediy TK2050, and the Hypex: 2x UCD180hg.

The prices are wildly different, but I have heard great this of the hifimediy unit.
__________________
Regards.
Michael
  Reply With Quote
Old 29th October 2010, 09:45 AM   #969
diyAudio Member
 
Join Date: Mar 2006
Location: Cheshire
Please let me ask another question:

What power should I expect into 4 Ohms speakers, if I use a 24v 4.5A smps with this amplifier?
__________________
Regards.
Michael
  Reply With Quote
Old 29th October 2010, 09:37 PM   #970
ericg is offline ericg  France
diyAudio Member
 
Join Date: Aug 2010
Hi Steinar and Hifimediy,

One bug on my V1.2 board: the power supply relay stay stuck even when the switch is open.
After knocking it a little bit, the contacts opened.
During the failure, I could hear the relay moving when switching on and off but the ampli was still playing.
After the capacitor that explode on V2.0, I'm starting to think there are some quality problem on the component choice. Is the relay correctly sized? It is given for 12A under 125 VAC but how much under 31V DC current?

Please give advise on what to do as this board is planned to be a christmas gift...

Eric
  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 08:09 PM.


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