AudioSector-chip amp kits, dacs, chassis - Page 187 - diyAudio
Go Back   Home > Forums > Commercial Sector > Vendor Forums > Audio Sector

Audio Sector Kits & PC boards from AudioSector

Reply
 
Thread Tools Search this Thread
Old 27th August 2007, 06:10 AM   #1861
diyAudio Member
 
Join Date: Dec 2006
Send a message via AIM to garage1217 Send a message via Yahoo to garage1217
Ok new pics All in the proper place *LOL* Not quite as perfect as the first time around but clean enough for me. Was a pain de-soldering the caps and re-installing them

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.
  Reply With Quote
Old 27th August 2007, 07:54 PM   #1862
diyAudio Member
 
Join Date: Jun 2006
Default a DANIEL LME49810 based amplifier?

Just wondering if there is any chance you might be experimenting with this.

What do you think of it?

Any chance of making aPCB?

Thanks,

Rick McInnis
__________________
Rick McInnis
  Reply With Quote
Old 27th August 2007, 08:31 PM   #1863
diyAudio Member
 
Peter Daniel's Avatar
 
Join Date: Jul 2002
Location: Toronto, Canada
Send a message via AIM to Peter Daniel
I'm not really into those driver chips, but you can get nice boards from here:

http://www.chip-pcb.cn/7300/49810-A.htm
http://www.diyaudio.com/forums/showt...69#post1248269
__________________
www.audiosector.com
“Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC
  Reply With Quote
Old 27th August 2007, 09:35 PM   #1864
diyAudio Member
 
Join Date: Jun 2006
Default I had seen those ...

I have heard some interesting rumblings about these things and thought MAYBE you had some ideas for implementation.

What is responsible for your hesitation in using these? If there is anything more to it than time?

It seems like the next step from the LM3875.

Thanks,

Rick McInnis
__________________
Rick McInnis
  Reply With Quote
Old 2nd September 2007, 01:39 AM   #1865
diyAudio Member
 
Join Date: Oct 2004
Peter,

what are "cz" and "Rz" used for on the lm4780 kit ??
  Reply With Quote
Old 2nd September 2007, 01:53 AM   #1866
diyAudio Member
 
Greg Erskine's Avatar
 
Join Date: Jan 2002
Location: Sydney/Australia
z=zobel
__________________
Greg Erskine
  Reply With Quote
Old 2nd September 2007, 09:18 AM   #1867
arild is offline arild  Norway
diyAudio Member
 
Join Date: Mar 2006
Location: madison
Default Bridge peter's LM3875

HI
this is my first post on the forum, i currently have the CT101 line stage from DACT http://www.dact.com/html/line_stages.html i would like to use peter's NOS DAC and four of his LM3875 ampifiers bridged into two 100W mono blocks, what do i need to do to bridge them since neither the DAC nor Pre have balanced outputs? could i us a transistor that changed the phase 180 degree's and if so does anyone have any suggestions for transitor type an a circuit for this? i found this on elliott's page http://sound.westhost.com/project14.htm i suppose this would work but looking for other designs as well. I would appreciate any comments to this setup since i am a newbie, i would like some recommendations. Even though my speakers are sensitive 95db i would like to pursue a higher power setup unless you guys strongly disagree!

Thank You

Arild:
  Reply With Quote
Old 2nd September 2007, 09:34 AM   #1868
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
Hi,
bridged suits high impedance loads.
It produces twice the power into double the load impedance.
However, current becomes the limiting factor.
50W into 4ohms is a very demanding spec for a chipamp, even though many builders go this route.
I would recommend you aim for 30W into 4ohms and and when bridged will give 60W into 8ohms. This will give about 108db maximum at 2.5m with your speakers. That is a very high level.

Alternatively, just go single and aim for 50W to 60W into 8ohms.
If your speakers are of a severe load type then consider parallel operation. This overcomes the current limit difficulty.
__________________
regards Andrew T.
  Reply With Quote
Old 2nd September 2007, 01:33 PM   #1869
diyAudio Member
 
luvdunhill's Avatar
 
Join Date: Jul 2006
Peter:

I saw a recent post of your linking to where you describe some mods to the Meitner bidat. I currently own one and love it. Given this, do you have a recommendation for a NOS DAC kit, and how does it compare to the Meitner? Any kits that use the TDA1547 that have a similar flavor (or better!) than the bidat?

Thanks!
  Reply With Quote
Old 3rd September 2007, 11:15 PM   #1870
arild is offline arild  Norway
diyAudio Member
 
Join Date: Mar 2006
Location: madison
HI Andrew

Thank you for the information, That would simplify things a little as well since i am a newbie. I can always try to parallel and such later to see what works best for my speakers. I have to decide on what amp to start with, i was set on the LM3875 but should i go for the LM4780? heck maybe i will just order both and find out for myself, as long as i can use the same power supply looks like the LM4780 are quite flexible to supply voltage http://www.national.com/cat/?i=289. Do you have a preference between the two amp's

Thanks
Ari
  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



New To Site? Need Help?

All times are GMT. The time now is 06:33 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