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In the Forum: Audio Discussions
In the Thread: It’s mad, mad, mad... electricity.
Post Subject: Episode 4: A New HopePosted by drdna on: 7/6/2009
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 Beav wrote:
I ran quite a few types of gear with the 2000 I tested.   It was quiet as a mouse with all of them.  So if you're having that kind of high frequency buzzing coming from the unit itself I'd say it needs to be returned and looked at by APS.  I'd lay odds they'll solve the problem or give you a new unit, and that you won't hear that buzzing.   Good luck.
I hate to respond to this kind of comment, which is a simple logical failure, but, okay I will, since there is some news. Just to clear this up, simply because you have not had an issue, does not mean that an issue does not exist, and that this must be a defective unit.  This is especially true when the company has already identified the problem, stated that it requires a relatively rare component setup to get the buzzing, but that they have reproduced it in their lab.

Now, as some kind of weird coincidence (or not?) I was contacted today by APS and they say exactly what I have said all along: the audio circuit that the PP2000 was hooked up to was creating a problem as a ground loop within the PP2000 charging circuit.  They have figured out a way to eliminate this but it requires making a new PCB to replace one in the PP2000. So they say they are going to make these and hopefully the replacement PCB will be given to me in a month. Well, I think this will solve the problem; I will keep you posted on the progress.


Adrian

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