New ta2020 pcb'S - diyAudio
Go Back   Home > Forums > Commercial Sector > Vendor Forums > Vendor's Bazaar

Vendor's Bazaar Commercial Vendors large & small hawking their wares

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 21st October 2008, 05:36 AM   #1
diyAudio Member
 
Join Date: May 2008
Send a message via MSN to ArjenShenzhen
Default New ta2020 pcb'S

Dear all,

From now i have 2 new Products,

the TA2020 PCB, fully assambled and tested 25 Watt per channel.

And a 6 Channel fully finished 3 X TA2020 amplifier PCB with powersupply! 6X 25 watt.

The powersupply delivers 10 A at 12 volts and the PCB has only high quality semiconductors from Fairchild, National, ONsemi and Tripath. Part numbers include:
- KA1L0880B
- MBR20100CT
- MC14069U ( for the controller section
- TA2020 X 3 ( Class-T 25 Watt amplifier IC

Pricing is:

The 2 Channel TA2020 PCB will cost 20 Euro
The 6 Channel TA2020 PCB will cost 50 Euro

Shipping via HKpost cheap and fast with insurance and traking number.

Other items on request.

Greetings,

Arjen Helder
Attached Images
File Type: jpg dsc00077.jpg (36.8 KB, 3780 views)
__________________
Always check the power supply... and my spelling...
  Reply With Quote
Old 27th October 2008, 06:51 PM   #2
glt is offline glt  United States
diyAudio Member
 
Join Date: Oct 2004
The 6-channel boards seem perfect for active crossover experimentation. Do you know of any kit/board for opamp based filters or active crossover?.

What is the shipping to the US?

Thanks.
  Reply With Quote
Old 28th October 2008, 01:33 AM   #3
diyAudio Member
 
Join Date: May 2008
Send a message via MSN to ArjenShenzhen
Default Crossoversss

Hey there GLT,

Ive seen some boards that can filter, but i doubt the quality of them,But what i can find here i can show you.

Would it be possible to fiddle with coils and caps? i think this is eazyer and more controllable.

Ive modded one board yesterday and ive seen the mods really amazingly improve the sound quality!

The input caps on this board are adjusted to match the speakers they are used with, Shitty 5.1 set's used here in China, so L/R front and back have the Bass filtered out, basicly because they have put 2 caps in series so i have bridged one of the caps and replaced the 0.1uF with 2.2 uF.

Also the Subwoofer Channel misses a 100nF cap and a 1K resistor. these need to be added to make the thing full range.

After the mod i went to listen and was amazed ! the sound now is worthy a TA2020! it took me about one hour to make the mod and about 20 CM of litz ( solder Wick )

For the less experianced DIY'er. i will be offering modded boards aswell.
__________________
Always check the power supply... and my spelling...
  Reply With Quote
Old 28th October 2008, 02:02 AM   #4
glt is offline glt  United States
diyAudio Member
 
Join Date: Oct 2004
ArjenShenzhen,

Thanks for the info. For my application I just need a second order low pass at around 1 KHz for 4 of the channels and no filter for the other two channels. Two channels will drive the tweeter and I have a first order high pass (one single capacitor) which I will use in order to protect the tweeter. 4 channels will drive 4 woofers (2 for L and 2 for R)

So it is very easy with opamps, but if there is something readily available, then it is easier. Since there is +/- 12v from the supply, I could even take advantage of that supply to power the opamps

Are the input caps thru hole or smt? (can you show a picture?)

Thanks.
  Reply With Quote
Old 28th October 2008, 02:17 AM   #5
diyAudio Member
 
Join Date: May 2008
Send a message via MSN to ArjenShenzhen
Default Input caps

Hi there,

Here a photo that shows the caps, luckely they are thrue hole, so nothing to worry about.

ive put red circles arount the caps, the signal go's thrue two caps before it goes to pin 9 and 11 ( input pins on the IC )

The trick is to remove the ones you can eazely reach and to solder a wire to short out the ones you don't want. ive used poly caps as input capacitors on my trial, they work just fine, and for some extra i can add those with the board. they cost me about 3 Euro per 8 Pcs. and they have roughly the same size as the caps that need replacement.The film caps ive used before are to big to fit here, but im looking for some 100 or 63 volts film caps, that might fit.

Greetings,

Arjen helder
Attached Images
File Type: jpg 6 channel board with all input caps.jpg (72.8 KB, 3332 views)
__________________
Always check the power supply... and my spelling...
  Reply With Quote
Old 28th October 2008, 04:36 AM   #6
glt is offline glt  United States
diyAudio Member
 
Join Date: Oct 2004
ArjenShenzhen

Do the caps have to be close to the input circuitry? Otherwise you can short all the caps and add them at the input wires. Thanks.
  Reply With Quote
Old 28th October 2008, 04:40 AM   #7
diyAudio Member
 
Join Date: May 2008
Send a message via MSN to ArjenShenzhen
GLT,

i have just finished a nice PDF explaining how to mod this board and get the best out of it, any one that wants this file, please drop me a mail and ill send it to you .

if there is any way of posting files here on the forum that are say 800 KB, i'd like to know :-)

Greetings,

Arjen

BTW i can also throw it true MSN, Arjenhelder using the hotmail service dot com.
__________________
Always check the power supply... and my spelling...
  Reply With Quote
Old 4th January 2009, 07:39 AM   #8
MartinQ is offline MartinQ  Canada
diyAudio Member
 
Join Date: Jul 2004
Location: Ontario, Canada
Can the outputs be bridged to produce 3 channel at higher output?
  Reply With Quote
Old 4th January 2009, 10:11 AM   #9
diyAudio Member
 
Join Date: May 2008
Send a message via MSN to ArjenShenzhen
Default Bridging

Hi there Martin,

These IC's have been internally bridged, if you have loudspeakers with a double woofer, then you can connect one woofer to each channel and do it that way.

Hope that answers your question!

Greetings,

Arjen Helder
__________________
Always check the power supply... and my spelling...
  Reply With Quote
Old 21st January 2009, 02:33 PM   #10
diyAudio Member
 
MikeHunt79's Avatar
 
Join Date: Aug 2003
Location: Bristol, UK
Hi, do you have any pics of the 2 Channel TA2020 PCB?
  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
Ta2020 Bengali Class D 0 29th September 2007 05:28 AM
What is the function of the V5A and V5D of TA2020 ? xrcd24bit Class D 0 20th November 2006 06:32 AM
Eb-ta2020 opentop Class D 16 30th May 2005 07:42 AM


New To Site? Need Help?

All times are GMT. The time now is 10:41 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