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Old 14th December 2010, 11:11 PM   #81
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Destroyer OS's Avatar
Join Date: Nov 2005
I did some more testing of grounds. It appears the one my equipment is hooked to is ok? I am at a loss why that one is ok. Whatever. My noise issues with ground etc are gone. Just that little bit of FM. I may try star grounding the outputs of the speaker OG like PD does. I have not done so yet but he does and prefers results so worth a try.

Again my pre-amp feeds zero DC, I checked it. I will see what I can do about approaching the FM with different resistors and capacitors. I may even have some laying around.

Thanks to everyone who is contributing to the thread in a productive way.
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Old 16th December 2010, 02:22 AM   #82
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danielwritesbac's Avatar
Join Date: Nov 2007
Originally Posted by Destroyer OS. View Post
. . . My stepped attenuator is only a 10k so perhaps switching to a 20k would be wise?
No, the 10k is just perfect.

10k is almost twice as effective at shunting noise as 20k.

So, keep your 10k.
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