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In the Forum: Audio Discussions
In the Thread: It’s mad, mad, mad... electricity.
Post Subject: Pure Power Noise and the Decca AntennaPosted by drdna on: 11/6/2020
In regard to the noise issue I had with my Pure Power unit in the past, I never noticed it with my tuner or other components, but I mostly listen to the phonograph. In particular the Decca cartridges are incredible as antennas and seem to pick up all possible electromagnetic fields. Maybe it was a dream, but I seem to recall one time picking up the tonearm from a record and hearing a local radio station being picked up by the Decca.
I can only say my noise -- this is from my memory -- was a higher pitch, but not a whine, more of a pulsing grating sound -- it was quite distinct from the standard 50 cycle hum we all know.
The system was quite fine without the Pure Power, so I knew it was not a ground issue but rather an issue with the Pure Power unit being added.
If unplugging your unit does not work, I suggest positioning the Pure Power in a different physical orientation. This worked well for my replacement Pure power unit, and the system is fine now.
You can even consider building a Faraday cage to isolate the Decca.
Again, particularly since the hum changes when you unplug the Pure Power, I would suggest checking the internal components to make sure all is well. I'm saying this mostly since I always felt the hum I had was a "early warning" signal for me before the unit experienced catastrophic failure.
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