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Showing content with the highest reputation on 03/01/2017 in all areas
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Lance had a great foil practice with a little help from the London Olympics foil silver medalist. Not only is she very kind and motivating but she's very cute. I say that from a purely competitive perspective mind you.7 points
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Had a surprising amount of fun going to the nVidia GDC event with Grahame. The projector they were using in-house was the single best picture quality I've ever seen on any screen, ever. My guess for it is 8k HDR 60hz. The on-screen demos were absolutely stunning. We got to play on one of the demo rigs afterwards, but all they had was some fighting game we were unfamiliar with.3 points
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Yesterday, Jump started the car 3 times with this, After the battery finally failed after 5 years and 10 months, as the starting had become progressively more suspect. Bought a replacement battery. I picked up a couple, after reading up on the Wirecutter, after "someone" managed to flatten a battery by means unknown (probably by leaving a light on, or door/trunk open). Small enough and light weight enough to keep in the car, and get to the battery, if say you have parked nose in, or would otherwise be unable to get a conventional jump start from another vehicle. Handy logic indicator lights in the cable (reminds you disconnect after starting) I'm a believer. Available from Costco https://m.costco.com/Lithium-Jump-Starter-And-Portable-Power-Bank-.product.100312116.html More details from the manufacturer http://winplus.com/usa/products/car-jump-start-portable-power-bank/2 points
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2 points
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Put a toggle switch in the load box (33/330) and ran RMAA on the #2 board (Cordell gate zobels only). Still looks good. I had a scope on the outputs and saw a touch of oscillation when I first fired it up. None after. So the 3 "cures" for the oscillation that I have found: Ferrite beads Cordell gate zobels Amb output zobels Board #1 has the ferrite beads. #2 has the Cordell zobels. I think I will put the beads on #2 also and the zobels on #1 and be done. Dynafet2_33_3.pdf Dynafet2_330_4.pdf2 points
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Brent has already negotiated price on my hand me down 980ti don't go undercutting me....1 point
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Preorders go live at 11AM EST tomorrow morning on geforce.com. As one of the fools who sits at the head of the Head-Case hand-me-down chain I am contractually obligated to purchase one.1 point
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What I coincidence, I have one in every vehicle I own, including the one car.1 point
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That's not a bass, that's a Lilliputian with a viola. I hope that made Justin and at least one other random person laugh.1 point
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there is a kit you can buy for a small headphone amp, a nutube in combination with a opa. it sounds nice, a mix between a very tubby millet portable hybrid amp and a solide state amp, not neutral. sweet highs and not overly smooth mids, nice wide soundstage, lows are fine and deep but not super sharp. for the price it is a fair offer, bad thing is that the nutube is verry microphonic and picks up electronic noise, was ok after put it in a case and secured it (with hot glue, the nutube don't get hot). https://www.tindie.com/products/microwavemont/nutube-amp-kit-a-vacuum-tube-in-new-century/1 point
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Found the perfect length (8cm IIRC) screw at ACE Hardware. Got lucky! I screwed the bottom transformer down first with the supplied pads and washers and then stacked the second one on top. It's very secure. I laid out the components (PS, amp boards, transformers, XLR sockets) with the objective to keep the transformers and ac wires as far away as possible from the input wire and the amp boards. No buzz no hum that I can detect1 point
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Just realized the whole windshield stuff is pretty OT for this thread. Got the glass replaced and it indeed is pretty much a copy of the oem glass. Some of the mold ends are not completely down on the ends and I may need to take care of that, but I think that is mostly cosmetic as it is the outer mold. Cheers Sent from my iPhone using Tapatalk1 point
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Put in the zobels (100pf-90.9R) in which seemed to cure this problem. I haven't done much testing yet, but didn't find any oscillation. Hard to find any ground points close by on the bottom (gnd plane is on top). Closest is about 2". Put the cap right on the gate pin. Resistor and teflon tubing later (x4) and done. That is the only change (other than Vbe multiplier resistor values) that I've done to this board from std. config.1 point
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LOL....close. 2009 Dodge Challenger so they're in the same class, right?!? The car is so much fun right now I can hardly stand it. Took a long time to get it to a happy place. Hope it lasts... HS1 point
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Private track rental at Royal Purple Raceway yesterday. It's called the Quick 30 but 40+ cars registered...LOL. It's a pretty good deal. You pay about $300, you get to run all you want with little to no queue and the track prep is phenomenal. They also feed you and generally there's a track photog shotting pics and vids. Very nice setup and one gets to meet some cool folks from all over the state and in yesterday's case the gent with the rail car (dragster) was from Minnesota...brother lives in Austin. Cool car. I made four passes. Was trying to shave a tenth off my personal best and figure out a few things. I played around with tire pressure on the drag radials (was definitely running them too low previously), raised boost a smidge for the conditions that day, locked up the converter earlier which was likely the biggest benefit, and ramped in my boost more quickly as the track was holding everything I threw at it. Can't underscore how few times I've been able to state this about track prep...it was awesome. My new personal best...got my 8.7. I might find an 8.6 on a perfect day and leaning on her a bit more, but I'd likely need to take the risk of lifting the heads at this point or making changes I doubt I'll make. Interestingly, I rotated my wheel inside the tire 8" in four passes. Beadlocks or the cheap screw through the wheel approach would be the solution. Not sure I'm willing to do that at this point but I now know why I haven't been able to get my 60ft time lower despite leaving at higher rpm....whoops. HS1 point
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Yup - a lot of them need to be taken with a pinch of salt. They were based on using carbon power in the construction (a bit like Elna Silmics use chopped up silk fibres and Elna Cerafine use ceramic powder). Whatever the physics behind using carbon, hence BLACK gate, the measurements in some of the blurb indicates that the ESR is lower than conventional electrolytics, and the inductive reactance is lower too. But only by a factor of two or three, or thereabouts. A guy called Cyril Bateman, who used to be in charge of capacitor design at one of the UK manufacturers, wrote a series of landmark articles about the sound of capacitors. He did this by designing a sub-ppm distortion oscillator, a tunable filter to get rid of the fundamental, and spectrum analyzing the distortion residuals. Electrolytics were run without bias and at different bias voltages. Also bipolar electrolytics and using two conventional ones back to back. Plus reams of stuff on other non-electrolytic caps. An archive of Bateman's output is here http://www.waynekirkwood.com/images/pdf/Cyril_Bateman/ for anyone looking for some light bedtime reading.1 point
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So I think this is pretty cool (sorry to toot my own horn, but I can't help it sometimes ). I've been meaning to miniaturize the GRLV supplies. I've got them down to boards that are 1.16" (H) x .8" (W). The output transistor mounts to the board and you can mount it directly to heat sinks. They are designed as LM78xx and LM79xx except with a TO-247 footprint. This means you'll still need the supporting components (bridge, diode and a few caps) that are found on the current boards. Here's what they'll look like... Note that the pass transistor will be folded up on to the board and you'll need to put some mounting pins in. I've made it so it is the same size as a standard horizontal TO-247 mount. EDIT: Note that there are set resistors are on the board (R2, R3) so the boards act like fixed regulators in the circuit.1 point
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Old wine in a new bottle - just finished casing mySS Dynalo today. Dual mono setup - one Antek 25va transformer and one 20VDC GoldenReference for each channel. Just over 14mA current on each output device (MPSWx6). First built this SS Dynalo back in 2014. Every time I took a break from my ES setup to listen to this amp I am amazed how much I like its sound. Wish I had the chance to listen to the top Focal headphones with this amp...1 point
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