A novel way to massively improve the SQ of computer audio streaming

[sandyk]

1 hour ago, elan120 said:

While this might be true for some products, but for etherRegen, according to the designer, it is not the case.  JS stated last year (below) almost no heat difference in relation to the range of input voltages, and my actual measurements between 7V and 12V input voltage show 104~106 degree F (40.0~41.1 degree C).

 

Clearly., you do  not have a problem like some, as 40.0~41.1 degree C is quite a low temperature (comfortably warm)  for most electronic devices You also need to take into account the Ambient Temperature at different locations.

 Unless it uses internal switching voltage regulators, then it should run noticeably warmer at the higher voltage unless it is in a well ventilated or Air Conditioned area when it is drawing >1A, even if the current draw is a little less at 12V.

7V at >1A is quite a bit of heat to dissipate in a small case (>7W)

 

[sandyk]

27 minutes ago, jean-michel6 said:

Every time the file coming from the hdd was sounding better .

 

 

SSDs need to have their cases securely connected to the 0 volt ("Earth") from the PSU, with their power leads screened too if possible as they emit far more RF/EMI back into the PSU, as well as radiate HF rubbish even into the Wi Fi region. (see attachment)

 They also sound better if their supply is pre -regulated down to a very low noise +5V from the the main supply rail to help further isolate them from the rest of the PSU area. Their PSU needs to have as low and flat an output impedance from almost DC to 1MHZ,.otherwise HF noise and detail will be accentuated.(Low ESR Electrolytic capacitors, by design, have a much lower Impedance at 100kHz than the VF range )

14A2-B4.pdf

[sandyk]

58 minutes ago, jean-michel6 said:

I really did take good care of my ssd : 

 - they were the best Samsung pro 

 - power was with a dedicated 5v psu mpaudio lt 3045 with good shielded diy psu cable 

- sata cable was the excellent Pachanko pure reference which is heavily shielded 

- the case of the ssd was attached to a heavy aluminium bloc as I did found it sounded better like that , however the case was not grounded as you recommend .

 

Even with all that hdd was better and no specific care for the hdd ( usb powered and ordinary usb cable ) 

 

Thank’s for the interesting attached document .

Altogether sata on mobo is also an EMI nest and noisy. I have totally disable sata on my demat pc’s with great sq results .

 

At the suggestion of one and a half (Gary) recently, I made sure that the cases of my internal Samsung 860 Evo ( OS SSD) and 850 Music SSD had a VERY low measured voltage drop between their cases and 0 volts at the SMPS PSU itself when switched on.

As Gary found, doing this did result in an appreciable improvement in  apparent noise and Soundstage. even though both were powered by in my case , dual <4uV noise +5V supplies regulated down from the internal +12V supply

 BTW, the typical LT3045 implementation does have a decreasing output impedance at >100kHz and may result in a little harshness /added HF detail due to this. Ideally it would also have a parallel considerably higher value NON Low ESR capacitor at it's output for this reason.

[sandyk]

59 minutes ago, ASRMichael said:

I’ve already asked the electrician to come back & add few more rods/spikes to get the 25ohms down to say 5 ohms. He’s thinking off creating a pit for each rod/spike to add magnesium sulfar, which will help with moisture/soil condition. 

 

 You sre unlikely to be able to achieve that low a resistance without a special grid as often used by Radio Amateurs and in Telephone Exchanges etc. Even then, that can be difficult in rocky areas.as we found in French's Forest Telephone Exchange in Sydney when we needed to upgrade the earthing. The additional earthing should also be on the side of the house that gets the least sun.

Alex

[sandyk]

11 minutes ago, jbparrish said:

if I mount an Intel Optane ssd in a housing and connect it by USB to my NUC, i.e. as an external drive, have I lost all of that Optane goodness because of the USB circuitry?

YES !

 https://www.intel.com.au/content/www/au/en/products/memory-storage/solid-state-drives/consumer-ssds/optane-ssd-9-series.html

[sandyk]

On 2/26/2021 at 4:48 AM, Middy said:

Theres 2 free tips you can do then on your gear...a little bit of silicone around network ports for anti vibration and desolder noisey but useful LEDs.. courtesy of innuos..

 

Modern  LEDs are not noisy, unless they are multiplexed as in frequency displays etc. It is possible though that if the power supply itself is noisy, that  there may be a small amount of radiation from the leads powering the LEDs .

LEDs are often used as  low noise voltage references in Amplifiers etc.  with voltages typically varying from around 1.5V to 3.3V depending on their colour and materials used in their construction.

[sandyk]

2 hours ago, Fourlegs said:

See Nuno's post in link below which clarifies why he thinks the inclusion of LEDs can be noisy.

 That's not what you said in your reply.

LEDs are not inherently noisy, so LEDs when drawing a continuous fixed current from a non noisy D.C.  power supply, such as an indicator LED powered via a suitable resistance value do not generate any readily measured noise .

In fact, you will see a LED used as a voltage reference used in the ultra Low Noise Jung Voltage Regulator

[sandyk]

35 minutes ago, MarcelNL said:

https://www.diyaudio.com/forums/parts/35821-noise-measurements-leds-zener-diodes.html Also read with interest that many LEDs become more noisy when they are exposed to light 🤔

 

Noise from LED's is not really a new topic, though I'm not aware of LED design changed a lot since or that newer LEDs have been measured for noise... that design guide telling designers to avoid LED's may really actually mean something, so do responses by people reporting to hearing a difference.

 

I have had a copy of that almost 17 years old article for years. 😉

 You probably can't even buy most of those old LEDs these days, due to markedly improved processing and in many cases a huge leap in efficiency.

 We are talking about different things here, You are talking about the quite low measured noise of those older LEDs and Zener diodes, where they are talking here about levels of noise generated by LEDs sufficient to generate interference.

The noise generated by those LEDs would be far below the needed amount to generate any interference if drawing a specified continuous current.

In fact, there are now some IR LEDS where the noise is so low, you need several in series to readily measure the noise generated. This has also been verified in. the Jung Regulator by Walt Jung recently who was working with an E.E. friend of mine in NSW Au.

 

See also :

 http://www.dicks-website.eu/noise_in_voltage_references/part1.html

[sandyk]

Just now, MarcelNL said:

great info! Nice, so that is one worry less if the power supplied to the LEDs is clean (meaning no PWM)

If Walt Jung is using them it's fine for me too...I have him in high regard!

 

Some interesting info in the link I just added.

Regards

Alex