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06-08-2020 Post does not mapped to Knowledge Tree
anthony
Posts 338
Joined on 08-18-2014
Post #: 1701
Post ID: 25862
Reply to: 25860
I have one
 Romy the Cat wrote:
There is a new interesting unit out there: Ecoflow Delta and it has a like brother Ecoflow R600. Somebody might try them for audio...


Romy, I have a Delta here, but do not use it for audio.  Would be easy enough to plug one DSET into it to give it a go though...see what happens.
06-11-2020 Post does not mapped to Knowledge Tree
anthony
Posts 338
Joined on 08-18-2014
Post #: 1702
Post ID: 25869
Reply to: 25862
Ecoflow Delta
Dragged the Delta inside today and plugged a single DSET into it.  Startup went ok but I was a little worried when the second stage caps started filling and Delta momentarily spiked at over 2kW draw.  Once the amp was fully started draw settled at 330w and the display indicated about 3 hours of power for the amplifier.  
Major drawback of these battery banks is the fan noise from the inverter producing the AC...too loud for a listening room.  Other than that it all worked for a few hours until the batteries ran out of puff.  Sound was ok, not saying any better or worse, I was otherwise occupied.  It should be put in another room if someone decides to go this way, and if you have a system that needs less juice to operate.  May be ok for source components, but I have not tried.
10-10-2020 Post does not mapped to Knowledge Tree
Kishore
Posts 2
Joined on 07-25-2015
Post #: 1703
Post ID: 25946
Reply to: 25580
PurePower update?
Since my PP unit was never returned from service by Purepower 9 years ago and I was promised Gold+ unit - they seem to have disappeared again.
Any update what is going on with Damian or Richard at Purepower? Their record of non-responsiveness seems to be exceptional.
Regards, Kishore
10-17-2020 Post does not mapped to Knowledge Tree
N-set
Gdansk, Poland
Posts 617
Joined on 01-07-2006
Post #: 1704
Post ID: 25948
Reply to: 25946
I would be interested too...
...in learning what is the reliability of the current production PurePower units. I'm considering investing in PP+1500 to power:

- A clone of Romy's phono (choke input filters)
- Headphone amp (180W)
- CD
- DAC (choke input)
- Sansui TU-X1


Cheers,
Jarek
STACORE
10-18-2020 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 10,155
Joined on 05-28-2004
Post #: 1705
Post ID: 25950
Reply to: 25946
The PP in 2020
Kishore, I do not really know what is going on with them. Last time I dealt with them it 2 year back. The display on one of my units went down and I reputed to them. They told me that is was faulty and sent me a replacement. I was not able to replace it and just plugged the new Display board siting outside of the unit. Other than this my 3000+ unit works flawlessly and I never removed it from my system over the years. I have another 2000 unit that was perfect, I do not use it and keep as a backup, in case my main unit goes doe and I am not sure if I will be able to get my 3000+ fixed and to sound in the way how it sound now. The battery that 2000 unit are gone but I have no motivations to replace them. 
 
From what you said and from what I head from a few other people who emailed me directly the way how PP conducts customer support was not changed. The way how I see it: it is what it is and it is fine. The reputation they make with the support they provide has a direct correlation with amount of units they sell. They clearly do not want to seal mode then they do and no one should blame then for it. In my view they have a spectacular product if it was in the hands of some people with more mature marketing awareness (or perhaps more money) then a PP unit would be sitting in each listening room. I am not kidding.  BTW, I gave in past to PP some folks who could pushed zillions of them to audio community but PP treated them with the same ridicules promise and misled expectations. My guys just did not wanted to be invalid in any relationship with PP anymore. I intentionally did not want to be involved in the relationship between PP and my guys and I wanted the chips to fall where they might.  They did, unfortunately. 
  
I do not know what objectives behind PP. They are a family and they might keep the entire PP project on the side to pay mortgages or to entertain children unit they go a better jobs. I did not see in them these draconian corporate objectives: we want more. They are quite laid back folks and perhaps that slow dripping operation through the pain of customers is what they wiling to have. Can somebody to blame them? I do not think so. The sad part is that they unknowingly (or better to say accidently) have a spectacular product. 
  
Anyhow, regarding the updates. I was told that they have a few minor but I am not sending my good unit to them. They introduced a rare-earth batter pack, which might be good or now. For sure it will give more buttery time, something that I do not care and for sure it will change the sound of the unit and most likely they changed not only the battery but the PS for charging. I do not have stamina now to go for evaluation of that neodymium buttery pack and it is hard to estimate if it make any difference in positive direction.


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
10-18-2020 Post does not mapped to Knowledge Tree
N-set
Gdansk, Poland
Posts 617
Joined on 01-07-2006
Post #: 1706
Post ID: 25951
Reply to: 25950
All understandable, but
...the problem starts outside North America - eventual shipping a faulty unit there and back, paying each time the cargo (20-40kg), customs, taxes, can be quite costly.

Romy, reading the beginning of the thread there seemed to be a problem with choke input PS. Is that solved? Does your EAR834 version works off PP?


Cheers,
Jarek
STACORE
11-06-2020 Post does not mapped to Knowledge Tree
N-set
Gdansk, Poland
Posts 617
Joined on 01-07-2006
Post #: 1707
Post ID: 25956
Reply to: 25951
PP and Phono - Help needed
I finally got a PP unit. It is 1500W model as this is enough for now. It is the actual Golden version (Plus not available anymore) but the PP factory claims it's identical electrically just in a new aluminium case and some extras added. I managed to find it EU in Czech Republic via the PP official distributor there: http://www.hifistore.cz/ The guys in Prague said eventual servicing is done by them in CZ so no shipping there and back to CA needed. V nice people to deal with actually (Disclaimer: just a happy customer, no business or other affiliation).

After connecting to the system digital, amplification and even the Sansui TU-X1 work like a charm! However I get a very strong brumming sound (sometimes periodic brum-brum-brum-bruuuuuummmmm) with the phono. With one cartridge (Decca, connected directly to phono) the sound is very very loud, with the other, SPU (connected via SUT, floating primaries) less but still unlistenable. The noise is somewhat lower in volume and changes the character to less brumming type when the PP is on batteries, but still loud. The phono is DIY Romy ER834. The PP unit is on the equipment rack, with the distance to the cartridges around 110cm and to the signal part of the phono around 140cm. (The tuner is half that distance and is dead silent). There should be no ground loops - the phono is the only grounding point, grounded to the PP, the ampl is with the ground lifted. The PP is grounded to the wall, the TT with its metal frame floating and connected of course not to PP but to the wall.
Any ideas where to look for a remedy?
Thanks,



Cheers,
Jarek
STACORE
11-06-2020 Post does not mapped to Knowledge Tree
Bill
Kensington, NH
Posts 117
Joined on 03-15-2010
Post #: 1708
Post ID: 25957
Reply to: 25956
Brumming
A friend of mine had the same problem. He cured it by moving the pp unit as far away as possible from the cartridge.Bill
11-06-2020 Post does not mapped to Knowledge Tree
drdna
San Francisco, California
Posts 526
Joined on 10-29-2005
Post #: 1709
Post ID: 25958
Reply to: 25956
Hum with Decca and Pure Power 1500 Plus
Agreed. I also had this issue with my Decca cartridge using the Pure Power and physical separation works well.
11-06-2020 Post does not mapped to Knowledge Tree
PurePower
Ayr, ON
Posts 44
Joined on 05-26-2009
Post #: 1710
Post ID: 25959
Reply to: 25956
Hum
Almost all such hum finds its way into your audio signal path through a ground loop, although it is technically possible for AC 50/60 cycle hum to enter from adjacent unshielded power cables. Make sure the AC cable to the phono is well shielded and if possible kept away from audio cables.
I will email you separately technical white papers on the sometimes difficult process of finding and curing ground loops. We also offer our own super shielded AC cables to connect PurePower output to components.
I'm sure Romy can explain the lengths he has gone to to ensure superior grounding schemes. It's probably already outlined somewhere on the forum.
11-06-2020 Post does not mapped to Knowledge Tree
Bill
Kensington, NH
Posts 117
Joined on 03-15-2010
Post #: 1711
Post ID: 25961
Reply to: 25959
Still waiting
Two years ago, I sent two pp 2000+ units to the factory to have them updated and changed over to lithium batteries, and paid for the service in advance. About one year ago, I received one of the units back.  After many calls, emails, etc. without answers for the past year, I have still not received the second unit back, or the plans they were supposed to send to have the external pp 2000+ battery pack changed over to a 3000+ pack. Hopefully they'll see this message and respond .
Thank you,Bill Gaw
11-06-2020 Post does not mapped to Knowledge Tree
N-set
Gdansk, Poland
Posts 617
Joined on 01-07-2006
Post #: 1712
Post ID: 25962
Reply to: 25959
More on the PP/phono situation
Thank you for the feedback guys!

- Bill and drdna below is the actual physical situation. The distance to the Decca is 110cm, to Phono 140cm (the noise is present even if I switch to a shorted MM input and the PP is on batteries). Looks like I will have to play with the physical separation and orientation. Not much space though to move away the unit PP and give how LOUD the interference is, I'd have to move it to another room almost. BTW, drdna the Decca/London is the Reference, which I think you know well Smile Indeed a v sensitive cart (somewhat hums with my ungrounded TT, picking the EMT930 motor noise) but if the conditions are right it can play out of this world even a bit humming!!

- The interesting, and sort of encouraging fact, is that the FM tuna plays terrific and dead silent, being almost right above the PP. So far it was reacting to every RF it could pick. It picked even RF noise from Edison decorative bulbs (!!) about 2.5m away (!!) and I had to change them to high vacuum ones! When I head the first sounds of it connected to PP, I jumped up. The sound is magnificent, even with my current suboptimal antenna arrangement (mixed up the polarizations) and so-so musical material I've heard so far.

- PurePower, I might be wrong but this doesn't sound *at all* like a 50Hz hum. Especially with regular pulsations appearing from time to time (quite similar to 8Hz brumming from WiFi/GSM, I once picked, but orders of magnitude louder). Probably the pulsations are the battery charger kicking in. To me this sounds more like RF interference, making it down to the upper bass. I will check again the grounding, but it should be a perfect star with only the phono being grounded to the PP schuko socket and the rest, including the TT, floating. The phono cables are double and triple shielded. Actually the massive, ungrounded TT frame and the rack might be the culprit, will experiment with grounding them.  The AC cables are unshielded, with only a 'drain' GND wire connected at the socket end, a la Paul S recipe. Never had any problems with them and as I said this does not sound like a 50Hz pickup.

Hope to make it work.

PP position.jpg

Cheers,



Cheers,
Jarek
STACORE
11-06-2020 Post does not mapped to Knowledge Tree
drdna
San Francisco, California
Posts 526
Joined on 10-29-2005
Post #: 1713
Post ID: 25963
Reply to: 25961
PurePower 2000 Plus update
I can only suggest to keep calling them. The product itself, as we all know is outstanding and makes everything else in the category look like garbage, but the service has always stayed at the level of a one-man operation. If they can get their service up to snuff, they would be unbeatable. I hope you can get your unit back soon!
Adrian
11-06-2020 Post does not mapped to Knowledge Tree
drdna
San Francisco, California
Posts 526
Joined on 10-29-2005
Post #: 1714
Post ID: 25964
Reply to: 25962
The Pure Power Not 50 Hz Hum issue
Jarek, When you say "not 50 Hz hum" it reminds me very much of my troubles I had with my Pure Power 1500 -- (before it "blew up" and needed to be repaired ... ultimately replaced with a new PP 2000 plus by Damien) -- but in any regard, the hum was caused by a circuitry problem inside the Pure Power unit, so you may want to check this out -- in my case the hum would go away completely when the unit was unplugged and I ran my stereo just from the battery power only, so this is worth a try if you haven't done it.
Adrian
11-06-2020 Post does not mapped to Knowledge Tree
N-set
Gdansk, Poland
Posts 617
Joined on 01-07-2006
Post #: 1715
Post ID: 25965
Reply to: 25964
Noise zoology
Adrian, was your PP1500 noise present ONLY in the phono section or across the sources/components? My tuner and digital work like a wonder, only phono picks the noise. I read your earlier description and my noise is not high pitched but rather upper bass, from time to time regularly pulsating. The noise changes its character but does not disappear if the PP is in the batter mode (although I have not physically unplugged it, just shut the input breaker OFF).


Cheers,
Jarek
STACORE
11-06-2020 Post does not mapped to Knowledge Tree
anthony
Posts 338
Joined on 08-18-2014
Post #: 1716
Post ID: 25966
Reply to: 25965
Start at the beginning
Jarek,

I would start at the beginning.  Turn off and unplug the TT motor, remove the phono cable from the phonostage and use shorting plugs to short the inputs.  This takes the TT/cart/arm/cable is out of the equation.  Do you still have the humm?  If so it needs to be sorted out right now before you plug anything back into it.  In my situation (not with PP mind you) I had to connect the signal and chassis grounds of the battery powered phono to get silence.  Yours may be silent, or it may have a different problem.

Get that sorted and then play with TT/cart/arm grounding...at least that is what I recommend.

Cheers,

Anthony
11-06-2020 Post does not mapped to Knowledge Tree
drdna
San Francisco, California
Posts 526
Joined on 10-29-2005
Post #: 1717
Post ID: 25967
Reply to: 25965
Pure Power Noise and the Decca Antenna
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.
Adrian
11-07-2020 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 10,155
Joined on 05-28-2004
Post #: 1718
Post ID: 25968
Reply to: 25962
The noise....
Jarek, the PP unit is basically a Chernobyl reactor that radiates a lot different fields. The PP did a reasonable job with incasing the unit in whatever they use (if you open it up you know it’s not so light and easy enculture) but it is never enough. Most likely your cartridge and your phono cable of transformer are particularly susceptible to the type of the air noise the PP radiate at your location. Just move PP away. I keep my PP in the basement, good 25 feet away. I did pick up some noise long time ago when I keep them too close. Remember if you have any cords running next to PP then it might induce noise in them. It might not as well. Keep the PP to plugged in the wall including the main’s ground, do not lift it. Do experiment with lifting the ground on PP consumers. Plug all your devises into an extension cord and lift the ground on that cord. If you have no noise then sprinkle salty water around your equipment stand and ask you mother-in-law to dust you equipment barefoot. You will have much less noise…

"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
11-07-2020 Post does not mapped to Knowledge Tree
N-set
Gdansk, Poland
Posts 617
Joined on 01-07-2006
Post #: 1719
Post ID: 25969
Reply to: 25968
I think I'm onto something, a ghost from the past?
Romy, do you power your End of Life phono from the PP??

I have the same phono, with choke input PS for both the heating and the HV.

1) If I plug the phono just to the wall, the noise just normal with PP operating Online some 2.5m away. Noise ok, no problems.

2) If I plug the phono to the PP at the same physical separation of 2.5m, all kind of hell breaks loose. Below is the spectrum of the phono output (with a shielded AC cable and PP in the Online mode). Switching PP to the battery operation lowers the noise practically to the normal level, but it's good only for 15mins of operation.

So does Gold PP1500 does not want to work with choke input PS, like the first unit Romy tested??

Other minor thing - with completely no load (everything unplugged), the load indicator bar is always showing the minimal 25% load? Normal with Gold units?

Noise PP Decca alpha AC.bmp




 


Cheers,
Jarek
STACORE
11-07-2020 Post does not mapped to Knowledge Tree
steverino
Posts 367
Joined on 05-23-2009
Post #: 1720
Post ID: 25970
Reply to: 25967
Agree with adrian
Strange hums in odd places do  often correlate with an internal PP fault. One time before the battery started to fail I got a strange hum through my SACD player. Never happened before. Later after the PP battery was replaced hum disappeared forever.
Page 86 of 96 (1,917 items) Select Pages:  « First ... « 84 85 86 87 88 » ... Last »
   Target    Threads for related reading   Most recent post in related threads   Forum  Replies   Views   Started 
  »  New  What lives in Symmetric Sound?..  The beginning of our journey is ALWAYS symmetrical...  Audio Discussions  Forum     19  175215  05-28-2004
  »  New  Always check power-line polarity...  The Cost of Knowing...  Audio For Dummies ™  Forum     11  112298  07-10-2005
  »  New  RAAL “Water Drop” tweeter for Macondo...  Your comment takes me by surprise...  Horn-Loaded Speakers Forum     77  924588  02-16-2007
  »  New  My feelings about new exciting audio products..  Vacuumstate...  Audio Discussions  Forum     25  264743  04-30-2007
  »  New  Musique Concrete horns..  These are now sold as Kornhent products...  Horn-Loaded Speakers Forum     6  108260  06-12-2007
  »  New  Compression drivers and the “clean signal”...  The NEW “Compression drivers and the clean signal”....  Horn-Loaded Speakers Forum     14  163516  07-12-2007
  »  New  Digi Redux; Drive 1 transport and iDAT-44+ DAC..  Moray James SPDIF!...  Didital Things  Forum     27  230577  09-28-2007
  »  New  Metal domes..  Try the one Lansche is using...  Audio Discussions  Forum     6  78946  11-08-2007
  »  New  The power AC Outlets?..  Where to Pick Up the Gong?...  Audio Discussions  Forum     2  43192  10-31-2008
  »  New  The Avicenna's failure is the great Avicenna success!..  New life for Avicenna...  Audio Discussions  Forum     8  83926  02-03-2009
  »  New  Internet and electricity..  Suboptimal. . ....  Didital Things  Forum     1  29349  01-07-2010
  »  New  Electricity... power strips and ac improvements..  Electricity... power strips and ac improvements...  Audio Discussions  Forum     0  16688  03-30-2010
  »  New  Another example of energy..  Tehran 230v...  Audio Discussions  Forum     1916  9942658  01-29-2011
  »  New  I good spot-light for a turntable?..  Reply...  Analog Playback Forum     15  154661  10-24-2010
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