Laptop with SSD, USB DAC, updated PAS 3, Fisher console amplifier also updated. Over time, began to hear a whine between songs or very quite passages, that builds, stops, rebuilds. Soft, but annoying. I don't have a spectrum analyser, my guess is the noise is in the 3 - 5KHz range.
Unplug laptop, so it is running on battery, dead quiet. So I figure it is AC conducted noise. Not much space so I filtered with Furman AC-215, it attenuated the noise about 50%. I turn off preamp, noise also halves so probably picked up through preamp and amplifier.
Replaced with Sherwood 5000, no noise. I would like to go back to the PAS and Fisher. Could sure use some insight/suggestions as to how the Sherwood is filtering the noise and apply it to the PAS and Fisher. Thank-you in advance.
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Topic - Digital noise, vintage equipment - fredtr 20:54:06 07/14/16 (10)
- RE: Digital noise, vintage equipment - airtime 21:18:44 07/14/16 (9)
- RE: Digital noise, vintage equipment - fredtr 21:21:29 07/14/16 (8)
- Here is what you can do. - Michael Samra 23:30:47 07/14/16 (7)
- RE: Here is what you can do. - fredtr 14:56:53 07/15/16 (0)
- RE: Here is what you can do. - airtime 11:44:37 07/15/16 (5)
- RE: Here is what you can do. - fredtr 14:59:15 07/15/16 (4)
- RE: Here is what you can do. - airtime 15:52:37 07/15/16 (3)
- RE: Here is what you can do. - fredtr 17:15:47 07/15/16 (2)
- RE: Here is what you can do. - airtime 10:20:35 07/16/16 (1)
- RE: Here is what you can do. - fredtr 14:26:15 07/16/16 (0)