Hafler DH500 DC Offset

LHMAudio · 27th January 2007, 09:49 PM

In anticipation of upgrading my DH500 with the Musical Concepts PA-3C driver boards, I decided to check DC offset in my DH500 and found the right channel at .125VDC and the left channel at -.550VDC. I was able to adjust the right channel to less than .010VDC but I cannot get the left channel better than -.220VDC.

My question is can I assume the DC offset problem is on the driver board and if I replace it with the Musical Concepts board the problem will go away.

The Hafler DH500 schematic can be found here:

http://www.hafler.com/techsupport/pd...00_amp_man.pdf

Thanks for any help.

anatech · 27th January 2007, 09:53 PM

Hi LHMAudio,
Yes. That should be what happens.

-Chris

LHMAudio · 27th January 2007, 10:00 PM

anatech,

Thanks for your quick reply. I will move forward with the Musical Concepts boards then.

27th January 2007, 09:49 PM	#1
LHMAudio diyAudio Member Join Date: Sep 2005	Hafler DH500 DC Offset In anticipation of upgrading my DH500 with the Musical Concepts PA-3C driver boards, I decided to check DC offset in my DH500 and found the right channel at .125VDC and the left channel at -.550VDC. I was able to adjust the right channel to less than .010VDC but I cannot get the left channel better than -.220VDC. My question is can I assume the DC offset problem is on the driver board and if I replace it with the Musical Concepts board the problem will go away. The Hafler DH500 schematic can be found here: http://www.hafler.com/techsupport/pd...00_amp_man.pdf Thanks for any help.

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27th January 2007, 09:53 PM	#2
anatech diyAudio Moderator Join Date: Jun 2004 Location: Georgetown, On	Hi LHMAudio, Yes. That should be what happens. -Chris

27th January 2007, 10:00 PM	#3
LHMAudio diyAudio Member Join Date: Sep 2005	anatech, Thanks for your quick reply. I will move forward with the Musical Concepts boards then.

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