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mansr

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  1. The freezer spray also cooled a large area of the PCB considerably.
  2. It would work to cool the hot side of the Peltier element. Alternatively, it could be attached to the backside of the PCB, giving the Peltier cooler a better starting point.
  3. Yes, there will be an area of lower temperature by the cold side of the Peltier element. How much lower and how far it extends depends on the thermal resistance of the various parts. To achieve any significant effect, you need to have high thermal resistance between the die and everything other than the cooling element. That isn't the case here, so cooling the chip is a bit like trying to create a vacuum in a leaky container.
  4. Mercury is pretty cold on the dark side. The lack of atmosphere might make listening a challenge, though.
  5. This case is a bit different since the chip is only producing a small amount of heat, less than 0.5 W. The problem is that to cool it below ambient temperature, you're fighting against inflow of heat from the PCB, which is made of copper and readily conducts heat from the air around it. In the end, you're just cycling a bunch of heat through the DAC chip without actually making anything much colder.
  6. You should team up with Rob Watts who "can" hear noise modulation at -300 dB.
  7. I have a boxful of PC water cooling stuff. The hard part is mounting the water block on the 10x6 mm chip.
  8. Like, for example, an Oppo Bluray player hidden inside a Lexicon case.
  9. SJK apparently thinks he can prove his sophistication by slagging off that album. I didn't realise that was a thing. My advice is to ignore him and keep enjoying Rumours. I quite like it myself.
  10. I tried that, but I couldn't easily cool the hot side sufficiently.
  11. I was goofing around with a PCM1794A chip when the idea occurred to me to see what happened if I hit it with some freezer spray. Monitoring with the REW real-time analyser, I gave it a quick blast. The reported THD dropped a little. Another blast lowered it some more. I kept going. The chip got covered in ice crystals. At a temperature of about -25 °C (according to thermal camera), the THD was some 5 dB lower than the starting point. The lesson here is clear. We need silent-running audiophile freezers with stylish looks and convenient cable inlets.
  12. Once at a conference event, I ended up in a group of people, one of whom was blind (not from birth). At one point, he mentioned the smell of a burning candle on a nearby table. The rest of us hadn't noticed it, but once it was pointed out, we had no trouble detecting it.
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