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I sat down today to listen what is going on with sound of my dedicated lines. Last night I shot down heating in my house and let the dedicated lines to care 3K heater (1.5K on each phase split) for enter day. So it is not brand new copper anymore. I do not thick that it break-in the lines but it did move it from the virgin stage

So, I have the whole system powered from PP3000 and have 3 chooses of the power sourcing for PP3000, in fact 3 power outlets behind the PP3000.  Memorize those 3 chooses as they are important.

Power Source #1 (PS1): Dedicated line from A phase of the 240V spit.

Power Source #2 (PS2): Dedicated line from B phase of the 240V spit.

Power Source #3 (PS3): House utility line that was selected by me as the best sounding. Uses the same phase split as PS1

It is 7PM, no light in the house only one single led at my listening table. The system is plagued into PS1 and the sound is nothing short of spectacular. I do not know if it is good electricity day or an average day but the sound is very good.  Switched PP3000 to battery operation. The sound is virtually identical. There is some very-very-very minor difference with advantage to battery but so minor that I would perfectly discard it. PP3000 is loaded at 42% and after approximately 45 seconds of battery operation the PP3000 shuts itself down. I have no idea why. The unit restarts itself (!!!) and as it stats the miter shows 89% of battery charge. As far as I concern it is something fuck up in my PP3000 as properly operational unit shall not shut itself down until much lower discarded. My PP2000 can draw down to ~25% and then shut itself off. Probably in PP3000 they use higher voltage batteries (96V vs. 72V) but they might not change the discharge logic and the 96V PP3000 still use the 72V logic of PP2000.  I do not know what is going on and I do not have second PP3000 to verify it. Anyhow, testing the PP3000 is not my objective now but I care about testing of my power lines.

Switching between the PS1, PS2 and PS3 do produce different results. Not day and night but different with one slightly better than another. It is interesting but the results are very much related to the fact what electricity I use in house. Now you will be very surprised. Juts this morning I was insisted in dialog with LX above that my PP3000 is immune to the bad sound from dimmers.  Well, with use of the dimmers in my house (I can use them ONLY in PS3 line, which is the same as PS1 phase split) the sound was changing BUT I am not convinced that with all dimmers heavily engaged the PS1/ PS3 line sounded inferior then PS2 (where there is no dimmers). Read it again – this is VERY interesting conclusion. The sonic difference was there but it was not only factor of dimmers but something else and I do not know what it is. Unfortunately I was not able to go farther as flipping between lines in my current PP3000 has some twist and sometime requires to restart PP3000 along with the enter system.  I need to have power source transition completely transparent as then I will continue this test. What I detected is that when the PP3000 starts and begin to charge the battery then it has very slightly different sound then what the battery is completely charged. This is acid battery as it always being charged but apparently the charging current doe has some impact to sound. 

Anyhow, acknowledging that I do have minor but notable difference between the power lines I am not sure that I know why the difference exists and what kind contribution the house utilities and dimmers have to it. I am sure I will figure it out but I do need a methodologically stable and predictable platform to base my observations. Now I do not have it die to the various reasons.

So, here is some data.

This is the picture of my mean Pussy. It has no relations to power lines but I do not care – she has relations to anything.

Here is the picture of my two dedicated line outlets

Here is the PS3 line with no lights in house except one dimmer at FULL power.

Here is the PS3 line with 6 dimmers engaged in half power

Here is the PS1 line (the same phase split) with 6 dimmers engaged in half power. You might see that measurable noise is lower.

Here is the PS2 line (different phase split) with 6 dimmers engaged in half power. You might see that measurable noise is much lower.

Here is the PS2 line with no light in house. Note a lover voltage – I have no idea why.

All images above were with PP3000 unpledged. Now it is something VERY interesting. The image below is the PS1 line (dedicated line that is the same phase split as the whole house) with 6 dimmers engaged in half power. It has to be the same as 3 images above BUT now the PP3000 connected to PS1 line and powering all system. The distortion that you see at the image: Dedicated_power_lines_5.JPG not there and PP3000 injects back to the power line a lot of own HF noise. If I go with faster time/division then you will see it in 20 kHz-30kHz. In the image below it make the wave fatter but in fact it is the PP3000 sampling nose coming back to power line. So, it looks like this return noise of PP3000 overrides the noise of the power line! What is very interesting that I got the same image for all 3 power lines when the PP3000 is plugged into the given power line.

I do not even mention that regardless what power lines the PP3000 is using the output is not distinguishable (visibly), regardless now noisy the line I was able to make. Still, the sound, as I said before, have some differences. What would be VERY interesting is to find correlation between the sounds of open power line under different noise condition and the sound of the same line after the PP3000. Then it would be possible to form the best operation scenario for PP3000 but to do it I need the fucking bypass switch in PP3000 !!!

Anyhow, this post does not do any conclusion but juts shares data. It provides more questions than answers but it does define the lay of the land and does form proper questions in my view.

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