Sure Electronics New Tripath Board tc2000+tp2050 - Page 111 - 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 March 2010, 06:32 PM   #1101
Abeam is offline Abeam  United States
diyAudio Member
 
Join Date: Mar 2010
Quote:
Originally Posted by sendler View Post
You can go to the higher value of 10 - 12uH if you want more of a textbook filter without any peaking which will be down a db at 20k into a 4 ohm speaker.
Is this this the reason for changing the existing inductors or do they have a low saturation current, high resistance, or other nasties?
  Reply With Quote
Old 8th March 2010, 06:52 PM   #1102
diyAudio Member
 
Join Date: Feb 2010
Location: London
Quote:
Originally Posted by mfong View Post
12 volts was like driving a Ferrari in second gear all day. I'm obviously not done yet, but I think there's a reason so few companies have messed with the t-2022 vs. the t-2050. I'm pretty sure that the t-2000 t-2050 combination sounds better and when you take the simplicity of the power supply into account, it's a lot cheaper to implement and much less finicky.
I would love to know if there are and what benefits is to be had for using a PSU beyond 24v ? I am about to buy my PSU, so will hold off for a bit
  Reply With Quote
Old 8th March 2010, 07:06 PM   #1103
mfong is offline mfong  United States
diyAudio Member
 
Join Date: Dec 2006
v-bro 50 volts! You're way braver than I am. I tend to draw the line at staying below manufacturer's recommendations. I know that Jay at Winsome Labs even cautions against going about 30 volts, or at lest 30 volts with batteries since battery voltages are sort of nominal. For me at this point, brave would be changing the input caps myself. My main speakers just have an 8" woofer, so I'm not sure the bigger cap will make that much difference. Maybe the higher quality cap might though.

I definitely can hear a difference between 12 and 19.5. My guess is that 24 with batteries ( I may have the only 12 volt ni-cad batteries still out there) is going to be really interesting. I can't go to 30 until I order something off E-Bay.

I did briefly think about taking two old laptop supplies, cutting the connector, and running them in series, but I'm too klutzy and could easily short something out.

It's interesting, folks made such a huge deal of the Sonic Impact being a great bargain at 20-30 dolars US. I know there's a difference between finished product and a board, but the Sure Board is a terrific deal.
  Reply With Quote
Old 8th March 2010, 07:51 PM   #1104
diyAudio Member
 
Join Date: Feb 2010
Location: London
And the Sonic Impact was a pig to work on, so tiddly, blew two of them... But making use of the input caps I bought for them with this Sure board which is nice.
  Reply With Quote
Old 9th March 2010, 02:35 AM   #1105
sendler is offline sendler  United States
diyAudio Member
 
Join Date: Aug 2004
Location: ny
Default 32v

Quote:
Originally Posted by Barbieboy View Post
I would love to know if there are and what benefits is to be had for using a PSU beyond 24v ? I am about to buy my PSU, so will hold off for a bit
The stock feedback resistors are optimized for 32v
__________________
Scott
  Reply With Quote
Old 9th March 2010, 02:38 AM   #1106
sendler is offline sendler  United States
diyAudio Member
 
Join Date: Aug 2004
Location: ny
Default 22uH

Quote:
Originally Posted by Abeam View Post
Is this this the reason for changing the existing inductors or do they have a low saturation current, high resistance, or other nasties?
The stock coils are too high in value at 22uH. The wire is hair fine. All coils, even with identical value, sound different. The Wurth XXL happen to sound the best for whatever reason.
__________________
Scott
  Reply With Quote
Old 9th March 2010, 02:42 AM   #1107
sendler is offline sendler  United States
diyAudio Member
 
Join Date: Aug 2004
Location: ny
Default 300ma

Quote:
Originally Posted by wwenze View Post
One thing I'm curious though, how much power does this draw at low volumes to be able to make the heatsink slightly warm? If the TA2024 doesn't required a heatsink, and Tripaths are supposed to be efficient at no to low-loads...
I measured the current draw. The Sure 2X100 uses about 300ma at 32v at idle and about 330ma at high power.
__________________
Scott
  Reply With Quote
Old 9th March 2010, 11:13 AM   #1108
diyAudio Member
 
Join Date: Apr 2006
Location: Reykjavík
Quote:
Originally Posted by mfong View Post
v-bro 50 volts! You're way braver than I am. I tend to draw the line at staying below manufacturer's recommendations.
Oh! To go to 50V you have to replace a bunch of components - including replacing the output driver chip with a chip that can actually take 50V, such as the STA517B.

Don't take a stock amp anywhere near 50V!
  Reply With Quote
Old 9th March 2010, 10:15 PM   #1109
mfong is offline mfong  United States
diyAudio Member
 
Join Date: Dec 2006
I'm still at the level of being really happy when I can actually hook it up and get it in a case and have it play music without the smell of burnt capacitors filling the room.
I really enjoy this board, but most mods I wouldn't dare do on my own. 50 volts on the Sure board is way beyond me. I wouldn't be shocked (sorry about the pun) at all if it sounds great though.
I did order a 32 volt HP 7130 printer power supply 3 + amps. I think it was 14.99 including shipping. I did try 24 volts of nicads last night. It sounded very promising, but I think the memory effect might have been a problem. I hadn't touched the batteries in years, charged them up (or so I thought) then they worked for about 5 minutes before making scratchy sounds.
Our home HP printer has an adapter that's 32 volts and 1 amp. I was tempted, but would have had to cut the connector off (odd size) and had a feeling that my wife might not be happy with me. She wasn't too happy about the batteries either :}.
I've been very pleased running the t-2020 with a smallish nimh battery pack. Thing plays forever and sounds very good.

In terms of what they call the "first watt" I still think it's a close call between the t-2020 Arjen version and the unmodified SURE under 20 volts and still not broken in. Once the music gets loud and busy, the difference is more obvious. The t-2020 with a decent tubed pre-amp and big speakers sounds awfully good for solo guitar or small voice ensemble.
  Reply With Quote
Old 10th March 2010, 03:55 AM   #1110
diyAudio Member
 
Join Date: Apr 2006
Location: Goulburn NSW
I have just received my 2050 amp there seem to be a couple of changes, one the amp came with an extra 12v fan and the whole heatsink appears to be attached via a pair of clips instead of glued, so easy to swap the fan out for the 12v and run it on a 12 v battery or a low volt ext supply.

Also underneath the board across from the input to the GND is a pair of what look like large caps?

The markings are U943 with AG underneath, I don't recall this being mentioned on any posts but maybe I just missed it.

Any ideas?
  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
FS: Sure Electronics Tripath Board tc2000+tp2050 wimdehaan Swap Meet 9 24th July 2009 11:41 AM


New To Site? Need Help?

All times are GMT. The time now is 06:36 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