Wiring Amplifiers PSU

Stinger · 2nd April 2009, 03:42 AM

Hi guys,
I've build a speaker for my notebook using three TDA2030's. With one amp connected to the PSU the sound quality is very good, but the quality drops as I connect other two amps to the PSU.
It gets hum...noise.
Could you plaese guide me how to wire multiple TDA2030 amp boards to a single power supply?

Thank you in advance,
Stinger

Rainwulf · 2nd April 2009, 11:48 AM

What current capacity is your power supply?

Stinger · 2nd April 2009, 01:01 PM

Quote:

Originally posted by Rainwulf
What current capacity is your power supply?

3A 12V-0-12V

Rainwulf · 2nd April 2009, 01:05 PM

Sounds like something isnt wired correctly.

Do you have a circuit diagram?

drummer_Dave · 2nd April 2009, 06:03 PM

do the other two amps work if you just connect them individually?

Dave

Stinger · 2nd April 2009, 06:31 PM

I don't have any at the moment. But I will draw one asap I can in a few days.

regards!
Strynger

Stinger · 3rd April 2009, 05:41 AM

Quote:

Originally posted by drummer_Dave
do the other two amps work if you just connect them individually?

Dave

Yes, Each amp is working with no problem, If it's connected individually.

Stinger · 3rd April 2009, 11:32 AM

As you see each amp has two grounds. one is for signal-gnd and the other is for decoupler and bypass capacitors.

Where's the problem with my wiring?

I have another question about the diode pole;
Can they cause any problem?

Stinger · 3rd April 2009, 11:32 AM

Rainwulf · 3rd April 2009, 11:41 AM

no picture there...

2nd April 2009, 03:42 AM	#1
Stinger diyAudio Member Join Date: Apr 2009	Wiring Amplifiers PSU Hi guys, I've build a speaker for my notebook using three TDA2030's. With one amp connected to the PSU the sound quality is very good, but the quality drops as I connect other two amps to the PSU. It gets hum...noise. Could you plaese guide me how to wire multiple TDA2030 amp boards to a single power supply? Thank you in advance, Stinger

3rd April 2009, 11:32 AM	#8
Stinger diyAudio Member Join Date: Apr 2009	Here's a digram of my wiring: As you see each amp has two grounds. one is for signal-gnd and the other is for decoupler and bypass capacitors. Where's the problem with my wiring? I have another question about the diode pole; Can they cause any problem?

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2nd April 2009, 11:48 AM	#2
Rainwulf diyAudio Member Join Date: Feb 2009	What current capacity is your power supply?

2nd April 2009, 01:05 PM	#4
Rainwulf diyAudio Member Join Date: Feb 2009	Sounds like something isnt wired correctly. Do you have a circuit diagram?

2nd April 2009, 06:03 PM	#5
drummer_Dave diyAudio Member Join Date: Oct 2006	do the other two amps work if you just connect them individually? Dave

2nd April 2009, 06:31 PM	#6
Stinger diyAudio Member Join Date: Apr 2009	I don't have any at the moment. But I will draw one asap I can in a few days. regards! Strynger

3rd April 2009, 11:41 AM	#10
Rainwulf diyAudio Member Join Date: Feb 2009	no picture there...

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