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Showing content with the highest reputation on 08/27/2024 in all areas

  1. 4 points
  2. This guy shoots IR film with a Hasselblad.
    4 points
  3. From St Marks in SF. I was not familiar with Ana's work, seeming to come out of nowhere. Turns out a prodigy and recorded in the 90's and early 2000s. And then just recently a PSAudio recording - for $58! Ouch. I will live with the YT compression for now. Nice selection and recording, and I liked Ana's performance.
    3 points
  4. Recently bricked my M2 MacBook Air by the simple expedient of drunkenly spilling bourbon into the keyboard. Luckily I had AppleCare coverage and just told them it suddenly stopped working and they were like whatever just send it back and get an M3, which I did. It has 24 GB of RAM and gotta say, it's snappy. Both kids are still on iPhone 13s and will get an upgrade to 16s. I like my 15 Pro Max just fine so I'll probably stand pat.
    2 points
  5. The calculation are based on some assumptions and tradeoffs. Ideally you need to know some things about the high voltage power supply the secondaries will be powering. 1. you need to know the minimum voltage input to the power supply to get the required regulated output at the required current. (the minimum input will usually increase with higher current draw). typically this will be a fairly small additional voltage above the output voltage for low voltage power supplies e.g. a few extra volts for the golden reference low voltage and typically in the few 10s of volts extra for the golden reference high voltage power supply. Since this is the absolute minimum you probably want a little more input voltage than that to be safe. 2. the voltage out of the wall also varies. In many countries during peak demand the power companies can reduce the voltage - typically by up to about 5 to 10% so you need about 10% more voltage on the output side than you might think to compensate the electrical grid giving you less than you expect. So we multiply the total secondary output voltage by 1.1 i.e. add 10% 3. Competent transformer design is also assumed. The more current you draw from a transformer the more inefficient it becomes. Which is why you specify the output voltage of the secondaries at the current draw you expect. If the manufacturers are crap and only design the transformer secondary output based on no load being applied you can have issues where the psu loads the secondaries and the output of the secondaries drops so much you don't get enough voltage for the psu to maintain regulation. Conversely if the manufacturers design the transformer properly, specifying a transformer with a much higher secondary current draw than it will actually experience will result in the secondary voltage being higher than expected. Any voltage going into the psu above the minimum amount required to regulate will be converted into additional heat. Any voltage below the minimum to regulate will result in loss of regulation and the output voltage dropping with greatly increased levels of ripple and noise. you also need to make sure the input capacitors in the power supply can handle the peak voltage going into them or their life expectancy will be reduced and in more extreme overload conditions they can fail completely. (the output caps are mostly isolated from the varying input voltage and should only see the DC voltage output the power supply is setup to output assuming there is no failure in the psu which causes the regulation to be bypassed/short out and pass all the available voltage to the output e.g. the pass transistor to be fully switched on or become shorted) [Since minimum dc voltage input for regulation - DC output voltage] is the additional voltage needed to regulate at the required current draw. secondary VAC = (minimum dc voltage input for regulation *1.1 )*0.707 Or secondary VAC = ((DC output voltage + minimum additional voltage for regulation)*1.1 )*0.707 so if we assume 10V more input is needed to regulate than output for 400V output we get: secondary VAC = ((400+10)*1.1)*0.707 = 319VAC
    1 point
  6. 1 point
  7. True by Jon Anderson (2024) https://album.link/i/1747342740 Example: Released on Friday. At first I was curious what it was. As a fan I was afraid it was be a 79 (yes he is 79) year old croaking through songs. It was far from that. Jon is in full voice, mature voice, but lovely. The tunes were very engaging. The Band Geeks, pretty much are Yes fans that are really good musicians. And they seem to be touring..
    1 point
  8. Well, damn, if others flake, it's time to remake. Double done.
    1 point
  9. Disparage away, F&F are slower than molasses so far this year. Meanwhile, this place continues to carry the water for everyone else. #NFLO
    1 point
  10. Not to disparage your other friends and family, but I noticed that all but one name on the donor list is a HC member. Plus beelee. 😎 #NFLO
    1 point
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