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Old 7th July 2013, 09:58 AM   #11
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Quote:
if I get a good, well-tested 3 way X-over design with PCB layout in PDF.
Making your own boards? A tougher way to go but true DIY. My best wishes. (Said in a positive constructive way.)
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Old 7th July 2013, 10:09 AM   #12
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Sir,
I tried tri-amping with TDA2050 earlier in a single cabinet like this I was planning. The experience was a really memorable one for me.

But you are right, lots and lots of wires, a total mess.

So I guess I should try something that you made so that I can get benefit from your experience. ( i.e. two completely separate powered speaker boxes with only two cables per box/enclosure ).
Another advantage of following your way is that it will save me from the hassle of finding a good cabinet for the amps and electronics and hence will surely save me some money. I have already spent a lot on this project.

I have a pair of DIY floor stander speakers. The components can be fitted easily inside them.
But I am unsure of the balanced signal and the crossover that I mentioned at post#9.

So I want to follow your path now.

Please guide me.


Thank you again.
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Old 7th July 2013, 10:11 AM   #13
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Originally Posted by Absconditus View Post
Making your own boards? A tougher way to go but true DIY. My best wishes. (Said in a positive constructive way.)
Yes sir, I can make boards very well with toner transfer method. I made some already and got good results. I am confident about my board making skill. LOL
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Old 7th July 2013, 10:56 AM   #14
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Project 125
Or
Linkwitz-Riley Electronic Crossover

I have used the P09 but am constructing the P125 for my new build; a larger, more expensive project. As always.
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Old 7th July 2013, 11:05 AM   #15
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Originally Posted by Absconditus View Post
Project 125
Or
Linkwitz-Riley Electronic Crossover

I have used the P09 but am constructing the P125 for my new build; a larger, more expensive project. As always.
Thank you for the links.

Interesting Project 125 is a 4 way system.
I might give it a try later on when I can save some money.
That also need building two 4 way speaker enclosures.
So I will continue with what I have with me at the moment.

I made a two way X-over following Rod's site earlier.
http://sound.westhost.com/project123.htm

This is my current X over ( completed with the help of dear fellow Diyaudio members).
DIY 3 way active crossover: as Christmas Holiday Project


But kindly post your experience with P-125. I'm eager to know.
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Last edited by csom; 7th July 2013 at 11:10 AM.
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Old 7th July 2013, 11:33 AM   #16
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Also could you post some photos of your LM3886 setup so that I can get some ideas?
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Old 7th July 2013, 12:31 PM   #17
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Originally Posted by csom View Post
Could anyone kindly tell me if this ground connection is okay or not?
no.
The first pair of caps must connect stright back to the centre tap.
This is the highest charging current pulse carrying route and MUST not share any part of it's route with another circuit.
Then connect the next two stages of smoothing together to form a Zero Volts Pints. Connect that Zero Volts point with ONE wire to the centre tap.
Create your Main Audio Ground (MAG) for all your AUDIO grounds. Connect the Zero Volts with ONE wire to the MAG.
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Old 7th July 2013, 12:35 PM   #18
AndrewT is offline AndrewT  Scotland
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As said by others:
Remove the caps across the rectifier bridge.

If you need snubbers, then add a snubber, NOT a low esr capacitor.
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Old 7th July 2013, 01:17 PM   #19
AndrewT is offline AndrewT  Scotland
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no.
The first pair of caps must connect straight back to the centre tap.
This is the highest charging current pulse carrying route and MUST not share any part of it's route with another circuit.
Then connect the next two stages of smoothing together to form a Zero Volts Point. Connect that Zero Volts point with ONE wire to the centre tap.
Create your Main Audio Ground (MAG) for all your AUDIO grounds. Connect the Zero Volts with ONE wire to the MAG.
repost with corrections
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Old 7th July 2013, 07:19 PM   #20
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Originally Posted by AndrewT View Post
no.
The first pair of caps must connect stright back to the centre tap.
This is the highest charging current pulse carrying route and MUST not share any part of it's route with another circuit.
Then connect the next two stages of smoothing together to form a Zero Volts Pints. Connect that Zero Volts point with ONE wire to the centre tap.
Create your Main Audio Ground (MAG) for all your AUDIO grounds. Connect the Zero Volts with ONE wire to the MAG.
Thank you sir.
I tried my best as I understood from your direction . Kindly have a look.

Quote:
Originally Posted by AndrewT View Post
As said by others:
Remove the caps across the rectifier bridge.
Done.

Quote:
Originally Posted by AndrewT View Post
repost with corrections
Done too sir.
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File Type: jpg Correction-attempt-LM3886-G.jpg (99.1 KB, 215 views)
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