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It was an interning event last night. The sound turned incredibly bad from electricity perspective. I did not have anything like this for a year or so it was very bad and it was clearly electrical. The PP2000 was working fine and the distortions in the raw side of the wall were incredibly low – it was almost a perfect sinusoid. Still, despite that there were no visible signs of problems the sound was horrible and disconnection from the grid did fix all problems immediately. I was wondering what it might be. Today I was talking with Pure Power asking about the shipping date of my PP3000 and I asked them if they experience anything similar. They told me that they did observe that they have witnessed that noise between neutral and ground med some systems go sound. This is very interesting as I did not monitor this noise. I was under impression that this noise is constant for any given inhalation but PurePower suggests that it is not. Well, yesterday there was first day of rain, perhaps it wet ground and did make something special ground condition that made the day special. Who knows… I uselessly measured the voltage between neutral and ground and anything under 1.5V I considered acceptable however I did not look into the noise level and noise structure. Today sound is fine and I did make some initial digs. I will compare them with the day what the sound will be VERY good or VERY bad. Take a look This is the neutral and ground noise at the exit of PP2000. All above is .5V per square.
 This is the neutral and ground noise at the entrance of PP2000.  This is the neutral and ground noise at the wall, the entrance of PP2000 with PP2000’s main switch off. 
This is the same as above only with .05V per square.
Then I desided to hear how the noise sounds. I took my HP selective voltmeter and filter out all sun 10.000Hz. The nose was very distinctive 33dB and with very characteristic whistling.
Let to see what other day will bring. I am very curious to know what it will be. Is it possible that THIS nose makes all difference? It would be not a big deal to shunt this nose with a cap; I wonder how it will affect sound…. Rgs, Romy the Cat |