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Showing content with the highest reputation on 03/15/2017 in all areas
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6 points
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Seems you make great progress, Whitigir. Already one amp working, then one is almost home. Made some more work on the Carbon. Managed to keep it within 4.5 x 2.4 inches. Three layers – will try to do this in kitchen….. For some unknown reason the software flips the to-126 in 3D view. Below: inner layer, and bottom.4 points
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I tend to assume mental illness, rather than straight up assholery. Especially given the number of people I know who could easily be either.3 points
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Finally received Front/Back plate for the 5U Dissipante - almost took forever. Decided to have a groove dividing the front plate into an upper 2U and a lower 3U, to have it look less bulky; it's still one 5U piece. The "pi" sort of symbols the topology To be continued ...3 points
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Spent approx. 5 minutes blindly picking. Paid no attention nor did any analysis. Which means I'll probably do well this year.1 point
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Check that you have - used the right transistors/ resistor values - have the right voltages from the PSU at the PSU connector - wired everything correctly. and check the voltages at the amp board as well - no shorts and/or blobs...if you have used too much solder it might hide a bad joint ...clean up with some wick and re-do with extra flux If the above doesn't make things work, post a close up picture of your board top and bottom.1 point
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Got somewhere between 6" and a foot. Shoveled for 6 and a half hours because I'm small and weak. But we can use the driveway now. Did I mention that I just love shoveling snow for hours? Somebody kill me it's my favorite! Guess I probably should have fixed the snowblower. Hindsight and all that.1 point
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^ I acquired a pair of Ether Flows. Hey who's counting? This is Head Case dammit. ... around $320US plus shipping.1 point
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Some of the mods make the sound rather gibbous, but I find the super dupont mod makes them sonically commensurate, homogenous and coterminous.1 point
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http://www.wsj.com/video/the-family-behind-viral-bbc-video-speaks-out/D6046F80-52A8-480F-8CF3-2C9AB00ACF44.html1 point
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The first two episodes have been good. Not great, but good. I think it's got some potential and the casting choices/decisions are far better this year than last. I wish they had a stronger third but maybe he'll grow into the roll through this season.1 point
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Yeah, sorry, I meant fresh (as opposed to canned) okra, not raw (but then prepared/cooked). I need to find a good Southern restaurant anyway -- for biscuits and gravy.1 point
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Newegg had them new for $899 briefly a few months ago. Any price south of $1k for a new pair has to be the best value in headphonedom, imo. Used deals like tkam's recent offer is even better. Sent from my Pixel using Tapatalk1 point
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I heard replacing the plankton with some krill will make things more copacetic.1 point
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In terms of price, they are aimed at the same market. In terms of quality, well.... If you do a search for electrostatic headphone amplifier schematics, both commercial and DIY, you'll find a lot of resistor loaded output stages, you'll find several constant current loaded output stages, and you'll find some transformer output stages, but you won't find any choke loaded output stages. The Woo WES uses choke loaded output stages. Now, there are two possible reasons why they are unique in this respect. The first is, they have a patent and nobody else can use it - however choke loaded output stages have been around for a long time, so that's not it. The second reason is, they don't know what they are doing and are using an expensive topology that is demonstrably inferior for this particular purpose. See my thread on current requirements for electrostatic headphone output stages for infinite gory detail on why current loads are the optimum way of loading output stage active devices from a strictly engineering perspective. Second, the WES has a passive power supply rather than a regulated power supply. Now, Stax also use a passive power supply, however they are much cheaper and much smaller so there's a good engineering reason for that. In an allegedly state-of-the-art design, there is no reason NOT to use a regulated power supply since the ideal power supply provides a perfectly stable, noiseless and unvarying voltage regardless of the demand on it, something no passive supply can do, and something a regulated supply is much closer to doing. In other words, IMHO the WES is state-of-the-wallet, but not state-of-the-art.1 point
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Beautiful! Now...get yourself a dynamic can and let us know how it sounds1 point
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Yup, the WES is for people who have no idea what quality sounds like and think "large chassis, toobz and high price" is a substitute for good engineering. I actually thought about buying one recently and document in a video just how to turn it into something useful for less than 1k$. Hell you could do it for even less and keep the stock PSU...well probably regulate it as it is just balls...1 point
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I might do a version of this circuit with SS CCS just to make it a lot less complicated.1 point