Transformer Hum

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Lurcher300b
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Re: Transformer Hum

Unread post by Lurcher300b » Sun Jun 10, 2018 11:26 am

Tesla are on their way to the best solution in my opinion
Maybe, and in most cases I would agree, but there is no info as far as I know just how pure the mains from their power wall will be. Efficiency and low harmonics tend not to go together.

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Dr Bunsen Honeydew
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Re: Transformer Hum

Unread post by Dr Bunsen Honeydew » Sun Jun 10, 2018 12:03 pm

I agree but it is worth finding out if the source impedance is increased too much. I reject lead acid (car) batteries for that same reason, but this looks potentially better.

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kellerist
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Re: Transformer Hum

Unread post by kellerist » Sun Jun 10, 2018 1:03 pm

I tried the best Eaton double conversion on-line UPS to get flawless power for hifi. Music dropped dead. I don’t understand why, but it’s a fact.

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Dr Bunsen Honeydew
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Re: Transformer Hum

Unread post by Dr Bunsen Honeydew » Sun Jun 10, 2018 2:08 pm

UPS and anything with filters in are musical disasters to a lesser or greater extent.

Lurcher300b
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Re: Transformer Hum

Unread post by Lurcher300b » Sun Jun 10, 2018 3:28 pm

The Tesla power wall is nothing more than a UPS designed to sync with the existing supply instead of having a in and out.

https://www.tesla.com/sites/default/fil ... _en_GB.pdf.

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Dr Bunsen Honeydew
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Re: Transformer Hum

Unread post by Dr Bunsen Honeydew » Mon Jun 11, 2018 12:00 am

Its big, with lots of little batteries, it is an enormous UPS compared with what people have for computers. I am hoping that at that power level with so many batteries in series parallel it will deliver an unimpeded flow.

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Fretless
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Re: Transformer Hum

Unread post by Fretless » Mon Jun 11, 2018 7:42 am

I do hear when my solar panels (33) kick in. A faint hum is audible from speakers on NVA amps that increases as the sunlight gets stronger.

Can't say that it bothers me though.
NVA: P50sa - SSP - A40 - LS6 - Cube3
Digits: RPi 2B/Allo DigiOne/Volumio/Tomanek ULPS/AQ Jitterbug
CD Transport: Cambridge CXC DAC: Metrum Acoustics Musette
Headphones: AQ Nighthawk Carbon H/P Amp: Schiit Magni 3

montechristo358
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Re: Transformer Hum

Unread post by montechristo358 » Mon Jun 11, 2018 9:41 am

interesting, mine only gets used for late night headphone listening, I must try it during the day when my solar panels are in the loop

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Dr Bunsen Honeydew
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Re: Transformer Hum

Unread post by Dr Bunsen Honeydew » Mon Jun 11, 2018 11:17 am

I am not talking about solar panels, this thing from Tesla or multiples of them, and now equiv starting to show from Chinese manufacturers, are thousand of small batteries. Basically they are same batteries as used in the electric Grand Prix and in Tesla cars, so if they can release energy that quickly for the acceleration they require then it could be good. You have it permanently connected on charge from the mains, it is basically a very large regenerator. It takes AC converts to DC, stores, reconverts to AC. It doesn't have to have solar panels feeding it. Talking of speed of delivery of current and source impedance, compared with lead acid batteries it is the difference between a race car and a milk float.

Compared with the regenerators foisted on to the Vicar and his dog by Coherent (slurp slurp) the Tesla wall unit is a bargain.

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Fretless
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Re: Transformer Hum

Unread post by Fretless » Mon Jun 11, 2018 12:45 pm

Those sort of battery units are being regularly implemented (in Holland, anyway) in combination with solar panels to provide power after sunset.
NVA: P50sa - SSP - A40 - LS6 - Cube3
Digits: RPi 2B/Allo DigiOne/Volumio/Tomanek ULPS/AQ Jitterbug
CD Transport: Cambridge CXC DAC: Metrum Acoustics Musette
Headphones: AQ Nighthawk Carbon H/P Amp: Schiit Magni 3

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