recomendations for a +-12v portable amp? - Page 3 - diyAudio
Go Back   Home > Forums > Amplifiers > Chip Amps

Chip Amps Amplifiers based on integrated circuits

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 29th June 2013, 07:19 PM   #21
diyAudio Member
 
Join Date: Jun 2004
Location: uruapan, michoacan, mexico
Default si

yes, maybe that either 2030A or 2050, with bipolar transistors at the output..
and bridged to take care for the 3x8in , and then anotherfor the small drivers array it will be like 1 ohm!! 1.33 , if i do away with 6 x8ohm drivers
ill check this schem later .
from the dataheet: and then modd it
Attached Images
File Type: jpg tda2030A.jpg (143.8 KB, 84 views)
  Reply With Quote
Old 29th June 2013, 07:49 PM   #22
diyAudio Member
 
Join Date: Jun 2004
Location: uruapan, michoacan, mexico
rite now leaving 4 the job!
still need to do this!!
  Reply With Quote
Old 1st July 2013, 11:38 PM   #23
diyAudio Member
 
Join Date: Jun 2004
Location: uruapan, michoacan, mexico
hey! your amp looks good. and how is it sound?
is it good? ive used tda 2030 before but had a bad pcb
(made by me) and didnot like the sound i got.
Now i know better!
cause 30 clean watts sure would help
got to try!
thanks...

sorry this was supossed to be answer for Mr john r66

Last edited by martin martinez; 1st July 2013 at 11:40 PM.
  Reply With Quote
Old 2nd July 2013, 02:34 AM   #24
johnr66 is offline johnr66  United States
diyAudio Member
 
Join Date: Mar 2009
The amp sounds excellent. I put them through listening tests and other checks before I consider them good. Keeping the decoupling caps near the IC and power & signal grounds separated is important. I also have an RF filter on the input.

I build the amps compact and mount on the aluminum 'L' bracket which aids in shielding the board from stray electrical noise. It is better to bolt the module up so the ICs are facing the heatsink, but the board sticks out more. Using a 12.6-0-12.6 2A transformer in the PSU, I get 38 watts of clean power into 8 ohms. Using the 14-0-14 4A transformer, I get 46 watts. You won't get as much power on the 12v batteries, but still plenty.
  Reply With Quote
Old 2nd July 2013, 05:12 PM   #25
diyAudio Member
 
Join Date: Jun 2004
Location: uruapan, michoacan, mexico
thanks! johnr66.
have you tried the circuit with the transistors at the chip output?
i just made one with lm3886 and sc5200-sa1493, and sounds very good and runs cool
or just warm on a PS with a 25-0-25 transformer! even when loud for hours.
i see you used perfboard, id like toget some cause here i can only get
the kind with traces for dil chips. May i ask you what schematic are you using?
thanks.
  Reply With Quote
Old 3rd July 2013, 02:38 PM   #26
johnr66 is offline johnr66  United States
diyAudio Member
 
Join Date: Mar 2009
I haven't used the transistors. For the power I need, the chip alone works fine. My speakers are fairly sensitive and I get plenty of clean sound at the listening levels I use with room to crank it when desired.

I laid out the components myself on the perfboard. The 5 pin chip amps are very easy to use on these boards as you can pack components in close to the IC and put the other side of the component right into a star grounding scheme. I can post an image of the layout if I can find it.
  Reply With Quote
Old 4th July 2013, 02:44 AM   #27
diyAudio Member
 
Join Date: Jun 2004
Location: uruapan, michoacan, mexico
maybe a photo of the board could help,
both sides please...
  Reply With Quote
Old 4th July 2013, 06:37 PM   #28
diyAudio Member
 
Join Date: Jun 2004
Location: uruapan, michoacan, mexico
i think that the bottom side only is easy enough
even from the posted pic maybe can resolve.
anyway, bottom pic is good if you can show it
please.johnr66?
  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
Looking for advice on selecting an amp for 12V supplied portable system Ford Prefect Class D 12 25th February 2013 11:37 AM
12V portable soundsystem help Bakewell Chip Amps 3 9th November 2010 12:07 PM
portable 12v power supply forkfingers Construction Tips 9 10th April 2010 09:27 AM
looking to make a higher end portable 12v amp,sugg.? elecres Solid State 2 6th May 2009 12:55 AM
12v portable soundsystem tRasH Car Audio 7 13th July 2005 01:54 AM


New To Site? Need Help?

All times are GMT. The time now is 02:17 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