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Old 23rd March 2007, 11:04 AM   #11
Did it Himself
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Curious why you think that op-amp change will do anything for DC offset - both are FET input chips.
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Old 23rd March 2007, 12:31 PM   #12
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Sigurd Ruschkowski has demonstrated that the AD8620 will eliminate DC offset, which is a problem for the Bugle.

http://www.audiocircle.com/circles/i...?topic=21339.0
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Old 23rd March 2007, 04:51 PM   #13
mlloyd1 is offline mlloyd1  United States
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my question also ?

Quote:
Originally posted by audioPT
...
BTW2... Why not Bugle's Power Supply?
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Old 23rd March 2007, 11:49 PM   #14
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Quote:
Originally posted by mlloyd1
my question also ?

I already responded to that:

Quote:
Originally posted by JWFokker

You know, that's probably the best idea. I had forgotten about it when trying to figure out how to get my power supply to work with the Bugle. I wonder though if I can just use a 12V transformer in the Bugle power supply, rather than the 15V it calls for, because I installed an AD8620 opamp in place of one of the OPA2134PA's to eliminate DC offset, and the AD8620 is only rated up to 13V.

Thanks for all your help.

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Old 25th July 2008, 03:21 AM   #15
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So I'm revisiting this after forgetting about the Bugle for a long while...

And it looks to me like I could just use two traditional DC power supplies or use a 24VDC supply (which I happen to have) and use a supply splitter? The TLE2426 is cheap, but is there a simple kit or PCB board that will allow me to use it for this? According to the Bugle manual, two 9V alkaline batteries (580mAH) should last 16 hours, so that works out to about 36mA draw from each battery if I did the math correctly.
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