GoodSoundClub - Romy the Cat's Audio Site

In the Forum: Audio Discussions
In the Thread: It’s mad, mad, mad... electricity.

Post Subject: Regarding the PurePower buttery.Posted by Romy the Cat on: 12/11/2010

Steve, get a little clue in what you are saying as your preaching on this subject of worshiping the butteries become a bit annoying. What battery solution I already use? Ruing playback from battery and the issuers with PurePower buttery related only because in the both cases the word battery has double TT in it. What battery magic? Let stay away from the sacrificial goat logic I am not in the mood for all of this, I will be making dim-witted jokes what everything will be working....

Regarding the PurePower buttery. Even thought the taking buttery off-line might easy to explain the bad sound from AC but at this point I do not think that it is what happens in PurePower. Last night I did some tests with PurePower. I was trying to see if the buttery stay online what the unit run from the AC. It is a bit tricky as I have access only to the buttery and logic that controls it is on the unit motherboard. I do not go for motherboard – that is what PurePower shall be doing instead of doing what they do now.

Anyhow, how to tell that the buttery is on-line when you have access ONLY to buttery? The logic I use was that whatever logic then use to control the AC/buttery operation shall have some delay. So, running the PP2000 from AC I put on the buttery a current probe. On a scope is showed some charging current. Then I activated a powerful 1kW load. At the very fraction of the second what the load is connected the PP2000’s AC supply does not know that higher current is drown and the presumption is that at the very transient moment a fraction of currant would be drown from buttery. So, what I was looking was a momentary current jump from battery and then return of battery currant back to zero after the PP2000’s PS begin to provide the sufficient current. Yes, it was the jump, much smaller than I expected but it was a clear momentary draw from buttery. This is an indication that the buttery is online. There was no current jump in opposite direction when I disengaged the load – that was strange. Anyhow, although it not 100% assurance but it highly likely that PurePower buttery does stay online during the unit run from AC. It is not to mention that to have buttery switched on and off would require a lot of extra logic and an army of mosfets that PurePower that intentionally probably would not undertake.

BTW, I clearly witnessed and clearly measured that the AC charger was acting absolutely wrong and in a way it might explains the sound problems the new PP2000 has.

Rgs, Romy the Cat

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