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

Sure Electronics Tripath boards?
Sure Electronics Tripath boards?
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 December 2007, 05:15 PM   #21
bongoman is offline bongoman  United Kingdom
diyAudio Member
 
Join Date: Nov 2007
Send a message via MSN to bongoman
So how do these sound once you fiddle with them?

I've ordered 4 kits but they seem to be taking their time sending them, or maybe it's just the Christmas post.
  Reply With Quote
Old 13th December 2007, 06:34 PM   #22
audio1st is offline audio1st  United Kingdom
diyAudio Member
 
audio1st's Avatar
 
Join Date: May 2005
Location: Foxton, CAMBS..
I've now disabled the DC offset cct and the DC at the speaker terminals has dropped from 500mV to 50mv and 20mv, much better..
The power supply I'm using at the moment is outputting 12.2V which after the diode and measured at the power caps is 11.8V. So if you leave the diode in place you should allow for the volt drop it causes.
It is sounding nice at moment and bass is OK to me. I'm not a very good judge of these things because I don't have top of the range high efficiency speakers.
I wonder why Sure seem to have used wrong value components. Please wait for more technically minded people to receive their boards and perhaps different findings..
  Reply With Quote
Old 14th December 2007, 07:02 AM   #23
Lostcause is offline Lostcause  United Kingdom
diyAudio Member
 
Lostcause's Avatar
 
Join Date: Aug 2005
Location: NW UK
Well mine still haven't arrived but it's pretty interesting reading your posts Barry.
I suppose the strip board is there for you to play around with.
VDD will be the 5V generator (I can't think that its the 12V rail unless they expect you to regulate it down?) so you can use it to switch mute and sleep and connect fault if you want? Put a MM on VDD and see what you get.
I think those inductors are coming off but without seeing the underside of the board I can't decide what to do yet........
Come on postie
  Reply With Quote
Old 14th December 2007, 08:24 AM   #24
audio1st is offline audio1st  United Kingdom
diyAudio Member
 
audio1st's Avatar
 
Join Date: May 2005
Location: Foxton, CAMBS..
Hi Lee, VDD near the Mute terminal is at rail voltage but there is a 22k between mute at chip and the Mute terminal and another 22k between Mute terminal and ground. So the voltage is dropped to about 5V at the Mute pin. So Mute connected to VDD does mute the chip.
Hope you soon have yours, PS not much to see on the back...
  Reply With Quote
Old 14th December 2007, 11:40 AM   #25
Lostcause is offline Lostcause  United Kingdom
diyAudio Member
 
Lostcause's Avatar
 
Join Date: Aug 2005
Location: NW UK
Hmmmm.......
The reason I wondered what was on the bottom was because the original posted picture didn't show the output diodes.....

But now looking at your picture Barry.... they have miraculously appeared!
  Reply With Quote
Old 14th December 2007, 12:21 PM   #26
audio1st is offline audio1st  United Kingdom
diyAudio Member
 
audio1st's Avatar
 
Join Date: May 2005
Location: Foxton, CAMBS..
The underside of the board..
Attached Images
File Type: jpg sure5.jpg (93.6 KB, 3253 views)
  Reply With Quote
Old 14th December 2007, 12:23 PM   #27
audio1st is offline audio1st  United Kingdom
diyAudio Member
 
audio1st's Avatar
 
Join Date: May 2005
Location: Foxton, CAMBS..
A better quality top shot..
Attached Images
File Type: jpg sure3.jpg (84.8 KB, 3309 views)
  Reply With Quote
Old 14th December 2007, 01:35 PM   #28
Lostcause is offline Lostcause  United Kingdom
diyAudio Member
 
Lostcause's Avatar
 
Join Date: Aug 2005
Location: NW UK
"Thanks a lot for your purchases. We are very sorry for the delay. The amplifier was out of stock for some days. Finally your package was shipped via airmail on December 12th. Normally it takes 10~15 days to the UK. We apologize for the inconvenience. Don't hesitate to contact us if you have any questions.
Best regards.
Sure Electronics"

Well... obviously 1st come doesn't mean 1st served then!

My new Years project it is then
  Reply With Quote
Old 14th December 2007, 02:11 PM   #29
audio1st is offline audio1st  United Kingdom
diyAudio Member
 
audio1st's Avatar
 
Join Date: May 2005
Location: Foxton, CAMBS..
Commiserations Lee I bet they ran out of 22k resistors Perhaps they might find some 1Megs.
  Reply With Quote
Old 14th December 2007, 02:24 PM   #30
Lostcause is offline Lostcause  United Kingdom
diyAudio Member
 
Lostcause's Avatar
 
Join Date: Aug 2005
Location: NW UK
Quote:
Originally posted by audio1st
Commiserations Lee I bet they ran out of 22k resistors Perhaps they might find some 1Megs.
I wasn't so hacked off then that would be funny....

...... nah! It is funny
  Reply With Quote

Reply


Sure Electronics Tripath boards?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


New To Site? Need Help?

All times are GMT. The time now is 09:07 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki