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Showing content with the highest reputation on 12/23/2016 in Posts
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15 points
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Saw the Dr. today. Got the stitches out, and everything is healing very well. He does want a final visit in two weeks, but expecting that to be it.9 points
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I laughed hard Steve, my good sir. So, today there was a chrismas/new year celebration at my work. After drinking few beer and watching bellydancer for a few second, I left and came to my hotel room. People change very fast when they drink, I've seen that clearly today. Also consultant of the corp. gave me a pack of cigars. Dunno why exactly but, I have theories about it. And FUCK, I miss my cats...3 points
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I was meaning administering drugs using nebulization. So you put a mask over your nose/mouth and inhale for minutes the saline solution with the drugs you want to deliver in the aerosol form a machine is forming. The drugs are usually some topic corticoid, vasoconstrictor and mucus fluidifier. Some people have the machines at home to get a humidifying session before bed. Those marine/saline baths are great, but I like better the ones that come into a soft plastic bottle with an olive in the tip closing completely the nostril, so you can apply all the pressure you need to get the nose clean. The name is rather unfortunate3 points
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my guess is that the transient part is all discrete, and very similar to the soekris with fewer bits. and like the soekris, opamps to do the se to balanced, and more opamps to do the filter. there are no off the shelf 24 bit dac chips. if there was, things would be much easier regardless of their price2 points
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Sent my 6S Plus to Davy Jones's Locker. Had it in my breast pocket while driving a boat and leant out over the gunwale to retrieve a waterski. Zip, plop, "fuck".2 points
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Event: http://www.canjamglobal.com/nyc2017 Tickets: https://www.eventbrite.com/e/canjam-nyc-2017-tickets-27210684891 (booking link at base of tickets page) Hotel Booking link https://aws.passkey.com/event/15956543/owner/1322/landing;jsessionid=FFE07604ABF323FC58E0E4564B1037A0 or https://aws.passkey.com/event/15956543/owner/1322/home2 points
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My Rotel RCD-855 (modded) is a TDA1541A-based player. I've also built Pedja Rogic's DAC and liked it, but didn't really use it much. Jim (morphsci) has it now. This DAC is the predecessor of the AYA DACs. I have at least a couple of spare chips as well. The 1998 Taiwan chips are supposedly the best ones (go figure). Check https://www.audialonline.com/topics/tda1541a-and-model-s-usb-part-4-tda1541a-grades-and-series/ for more info on the grades (than I ever knew). Apparently many of the std. A grade chips measure so close (or as good or better than) that it isn't worth paying the exorbitant pricing people are charging for crown chips.2 points
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The New York Times ran a very nice profile on Steve Kerr, the coach of the Golden State Warriors, today. http://www.nytimes.com/2016/12/22/sports/basketball/steve-kerr-golden-state-warriors.html If you don't know about Steve's unique background I absolutely recommend giving it a read. Steve is a very worldly, very intelligent guy and after reading the piece you'll know why.2 points
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Sorry, it was in the group buy thread. Also he mentioned that R1 and R3 should be 422 ohms, not 402. I got my Dynalo all back up and running, offset dialed in, GRLV. Listening, it sounds very good. I can't tell if it sounds better than it did with the sigma22; I think so but going from memory. I also had found that I had miswired the switch I use for SE->BAL input; it had left the - input floating when in SE mode, so I corrected that. Flipping back and forth, I couldn't tell any difference. Might have to actually listen to this with balanced in one of these days, if I can get my XLRs back from my son1 point
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I bought a bunch of LEDs to test the voltages. I liked the LTST-C170CKT since it had a high Vf. Changing the LED will have a big effect on the output current if it's not matched to the resistor.1 point
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Meanwhile, don't be this guy ... http://www.theregister.co.uk/2016/12/23/virgin_america_flight_samsung_note_7/1 point
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I completely agree that a chip, or hybrid solution would be best. In fact the concept of using a laser trimmed metal foil R2R network, where the foil network was layed down by photolith ought to be superb, hermetically sealed and dry nitrogen filled. Cheap it would not be...1 point
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You needed a proper mobile anyways. **BRENT** Sent from my ONEPLUS A3000 using Tapatalk1 point
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I really like that place but haven't spent enough time there. Have fun!1 point
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What? No. If someone wants to believe that discrete sounds better, they need a product to satisfy their placebo tendencies.1 point
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Can someone post the event hotel details. I'd like to at least book a room with the hopes of finding a way to get down there.1 point
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There is absolutely nothing to prevent laser trimming, or selection to any tolerance you like provided that temperature and voltage coefficients are low enough. 0.01% tolerance is 10ppm or 1 ohm error in 10k. Temperature coefficient is around 3ppm/C so to match tolerances at a 10ppm level the measurement temperature has to be constant to 1C or thereabout. Foil resistors are superb, but are punishingly expensive. And any SM component has to be soldered using precisely the soldering profile in the datasheet for the parts - because component stress and thermal shock will shift the resistance too. However you look at it, it isn't trivial, is all I am saying.1 point
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It is all down to how the tolerance is statistically distributed. You can get two different scenarios. (i) All resistors in any production batch are clustered in value or (ii) resistance values in a batch are randomly distributed. This could only be established by measurement. However, if (i) holds then the batch will have a constant error and if (ii) holds then the values will be normally distributed. Typically the nominal tolerance will be 3-sigma, which would mean that less than 0.27% of resistors were out of tolerance. So the majority of resistors will be significantly better than nominal tolerance. The difficulty in getting accuracy is that you need to test a large number of resistors. If 100 resistors are tested the nominal error is 10%. To get 1% confidence you would need to test 10,000 resistors - er, no thanks at that level!1 point
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But you're still using the same math, just different numbers. I don't think overall that's what you'd get. You could get as good as that here and there, but your average error would still be bad.1 point
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From last night. May have another tonight. My son arrived this morning and I have to freeze or eat the remaining steaks so I think eating them is in order. They are too good. Sent from my iPhone using Tapatalk1 point
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I live 10 minutes drive from my shop and I ended up having to mail them a check recently. They were doing their annual bike drive for local kids and I bought 2 kids a bike. It is depressing how little time I have for anything not work or kids during daylight hours.1 point
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here is the soekris output section http://gilmore.chem.northwestern.edu/dac.pdf notice that the top set of switches is wired to +4 and ground, and the bottom set is wired ground and -4v (this is how you get sign/magnitude without any dc on the output. each audio-gd board is half (less than half) of a soekris single output. how you put two boards together to get rid of the dc is unclear. I see no way to wire one set of switches to ground and -vcc. soekris is sign/magnitude, audio-gd in single board form is definitely 2's complement switches look the same soekris does dsd by using just the 3 segment bits1 point
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I added some LEDs to my phono stage. I used LM317 in the spirit of the original Pass Xono. Wanted something subtle and channeled Nate a bit on hatred of bright blue LEDs1 point
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No one around to joke with. I'll tell you one thing, using my right hand after 40+ years with my left, feels like having a new boyfriend.1 point
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Slacker. Side note, how are the "one finger per inch" jokes coming? **BRENT**1 point
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Well I'm healing faster than I thought. Still going stir crazy though. Hope to get back to work very soon. Stitches come out Friday.1 point
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No - I've never been an academic. I did my first degree in electronics and then a doctorate in laser physics. But my career was first in professional consultancies and then in industry (including 7 years at Oxford Instruments - which is why we live here). And for the last 20 years as a self employed technology and business/management consultant. In fairness in my mid 20's I applied for a "new blood" lectureship at St Andrews University in Scotland. That was the strangest interview I have ever had, and decided academia was not a good fit for me (from my perspective didn't pay nearly enough, no prospects etc), and we parted company. Plus the clowns approached the CEO of the tiny 20 person company I worked for, for a reference without asking me first. So had I not left anyway to join PA Technology my career there would have been blighted. I did have a five year foray back into an academic environment in recent years, but as a self-employed large project manager. What particularly surprised and dismayed me is what a political and backbiting environment it is, particularly at a senior professorial level. Everyone watches their backs pretty much continuously, jockeying for position. I'd have hated that aspect of university life.1 point
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Dat was spicy - mine was not so hot - but very good. (and the Ringo Star (okay cocktail))1 point
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Today I decided to eat something fancy, Külbastı (A Turkish cuisine dish): It's basicly chicken breast fillet, marinated with special spices and cooked on special grill. As you can see, it was served with grilled tomatoes, green pepper, rice, acılı ezme (spicy paste) and a mezze I do not know. Since I cannot cook in my room, I'm discovering all nearby (Taksim, Harbiye, Beşiktaş, Nişantaşı etc.) places for food. So when you come to Istanbul, you'll know where to eat cheap and delicious or high performance/price ratio dishes.1 point
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Looks like the BDP-105D is discontinued. I've given up on HDCD, so I'll look forward to reading reviews of the upcoming UDP-203 and 205. There's very little information about their audio sections, but I'm hoping they've been improved (not that there's anything wrong with the 105's output).1 point
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