Tripath EB-TA2022 Board - Page 4

teamacc · 13th August 2010, 11:06 PM

Sure, the opamp/source will have the ground connected between the two.
The net ground will complete the other part of the loop.

This because most people connect ground from net with ground from source.

IvRak · 14th August 2010, 07:31 AM

OK.

So if the two amplifiers share the same supply, and the ground loop only appears, when I connect the signal to the second amplifier, I could possibly iliminate it by cutting the signal ground to the second amplifier, and share the ground in the other signal cable?

Would this work, or even sound good?

teamacc · 14th August 2010, 07:58 AM

I think it might disable the hum a bit, but would not sound right.
If the second amp has no ground to reference to but the ground from the net, hum might as well reappear.

Although ive been wondering what would happen if you place twice as big input caps on the board, with that same caps on ground input too. As far as i can see, it let the amp keep the reference to signal ground, but not effectively connect it. (please, correct me if im wrong)

Also, you can try to only ground the chassis of the amp, and not connect the net ground to the amps zero volt line. Make sure that the pot is insulated from the chassis, as it might ground there....

juanito · 22nd August 2010, 05:06 PM

Has any body tryed the amp5 from 41Hz??
Do you think there will be much diference between the auspicious.e TA2022 and the amp5 41hz?
thanks! I'm looking also for a ta2022 amp based for my FX120 fullranges.

IvRak · 10th September 2010, 12:02 PM

teamacc:

Thanks for your suggestions.

The reason I have been slow to reply is that due to an error on my part I fried both amps

I accidentally broke the ground wire suppluing both amps, while they where powered on, and that resulted in two blown up 7912 regultors (loud bang from one of them), and both amps going into protection mode.

New 7812's and 7912's have been installed, and both amps work again.

To make a long story short, I hooked up the two amps with separate supply's, and the humming completely dissapeared. I have both playing right now, and there is absolutely no noise

They actually sound quite good. Not as good as my Hypex UCD400HxR's, but close enough, and at a much lower price.

Now on to building some nice boxes for them to live in

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
FS: (3) Tripath EB-TA2022 2x100W modules	theAnonymous1	Swap Meet	5	9th November 2012 07:11 AM
TRIPATH EB-TA0104 revisited	QED047	Class D	4	3rd September 2009 09:36 AM
FS: Tripath EB-TA4100 4-Channel Class-T Amplifier Evaluation Board	ralphs99	Swap Meet	7	16th May 2009 09:33 AM
Tripath EB-TA2021B Evaluation Boards	DavidJanszen	Swap Meet	0	15th April 2008 08:07 PM
FS: Tripath EB-TA2022 Ver. 1.7 Eval board	theAnonymous1	Swap Meet	3	15th February 2008 02:48 PM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	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

13th August 2010, 11:06 PM	#31
teamacc diyAudio Member Join Date: Jan 2010	Sure, the opamp/source will have the ground connected between the two. The net ground will complete the other part of the loop. This because most people connect ground from net with ground from source.

14th August 2010, 07:31 AM	#32
IvRak diyAudio Member Join Date: Aug 2009 Location: Denmark	OK. So if the two amplifiers share the same supply, and the ground loop only appears, when I connect the signal to the second amplifier, I could possibly iliminate it by cutting the signal ground to the second amplifier, and share the ground in the other signal cable? Would this work, or even sound good?

14th August 2010, 07:58 AM	#33
teamacc diyAudio Member Join Date: Jan 2010	I think it might disable the hum a bit, but would not sound right. If the second amp has no ground to reference to but the ground from the net, hum might as well reappear. Although ive been wondering what would happen if you place twice as big input caps on the board, with that same caps on ground input too. As far as i can see, it let the amp keep the reference to signal ground, but not effectively connect it. (please, correct me if im wrong) Also, you can try to only ground the chassis of the amp, and not connect the net ground to the amps zero volt line. Make sure that the pot is insulated from the chassis, as it might ground there....

22nd August 2010, 05:06 PM	#34
juanito diyAudio Member Join Date: Nov 2006	Has any body tryed the amp5 from 41Hz?? Do you think there will be much diference between the auspicious.e TA2022 and the amp5 41hz? thanks! I'm looking also for a ta2022 amp based for my FX120 fullranges.

10th September 2010, 12:02 PM	#35
IvRak diyAudio Member Join Date: Aug 2009 Location: Denmark	teamacc: Thanks for your suggestions. The reason I have been slow to reply is that due to an error on my part I fried both amps I accidentally broke the ground wire suppluing both amps, while they where powered on, and that resulted in two blown up 7912 regultors (loud bang from one of them), and both amps going into protection mode. New 7812's and 7912's have been installed, and both amps work again. To make a long story short, I hooked up the two amps with separate supply's, and the humming completely dissapeared. I have both playing right now, and there is absolutely no noise They actually sound quite good. Not as good as my Hypex UCD400HxR's, but close enough, and at a much lower price. Now on to building some nice boxes for them to live in