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Thanks, I am willing to try this...

Posted by madisonears (A) on January 14, 2007 at 00:35:43

In Reply to: Testing for DC presence on AC mains posted by madisonears on January 12, 2007 at 17:46:17:

Thanks, all, for your suggestions; although, I must say, some of them were not entirely sensible and prove that the moniker of this organization is aptly given. I am not about to go sticking a volt meter or anthing else, other than a plug, into a live circuit. I will not install a cumbersome and probably expensive isolation transformer.

Because the manufacturer, who will remain unnamed here unless they absolutely fail to support a potentially defective product (and then, all hell will break loose!), has admitted that they use a transformer with the fewest possible turns so as to make it more efficient (although I suspect it is just as likely that fewest turns makes it less expensive for them), and they have informed me that such a configuration of minimum turns is the most susceptible to DC saturation and associated humming, I am willing to purchase for trial the CI Audio gizmo to filter whatever DC may be on my mains, according to their and your recommendations. I only wish I had known when purchasing the amplifiers that I would need to spend another $300 to get them to work properly; that is, quietly.

Peace,
Tom E

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