January 13, 201610 yr comment_716838 thanks for your comments , had a long listening session last night and it's great. thats exactly the case i used, it's nicly made and everything fit fine. but i wouldn't build anything with more than 10-15 watt class a in this case, not good for dissipating heat. you find it also on aliexpress, their i did get mine. the front is lacquered with metallic car color on a primer, fit's the color of the th-900 and always good to bring a little color in your life. the logo of the delivered case is aluminium, screwed on, i replaced it whit a printed piece of wood. anodising is on my wish list to do myself but i think it's tricky with bigger parts. Report
January 15, 201610 yr comment_717075 Nice build. Regarding aliexpress, was poking around, and look what came up... http://www.aliexpress.com/item/Special-case-for-T2-electrostatic-headphone-amplifier-of-KG-version-and-the-special-water-cooled-suite/32287454977.html?spm=2114.01020208.3.203.ODIe0L&ws_ab_test=searchweb201556_1,searchweb201644_4_10001_10002_10005_301_10006_10003_10004_62,searchweb201560_8,searchweb1451318400_6150 Looks like something right up someone in skokie's alley Report
January 15, 201610 yr comment_717172 Supercomputers combine high voltage and water cooling. But these are multi-million dollar systems built by people who actually know what they're doing. Report
January 16, 201610 yr comment_717262 I don't know if this is a solution but there are dielectric liquid coolants, such as silicones, used in the electric and electronic industry, as an alternative to water. Report
January 16, 201610 yr Author comment_717268 pure ethylene glycol. I use it by the gallon to cool the xray cameras. slightly toxic. Report
January 16, 201610 yr comment_717287 I hadn't really noticed nor was commenting on the liquid cooling feature; more that the excessive bling reminded me of some shit... Edited January 16, 201610 yr by Pars Report
January 17, 201610 yr comment_717345 12 hours ago, kevin gilmore said: not a liquid. Pack it solid with berylium oxide grease and whack on a BIG heatsink on one side..... Report
January 17, 201610 yr comment_717376 On January 15, 2016 at 5:38 PM, Pars said: 15 hours ago, kevin gilmore said: pure ethylene glycol. I use it by the gallon to cool the xray cameras. slightly toxic. Ethyene glycol, AKA automotive antifreeze. Report
January 17, 201610 yr comment_717393 Yep, some have put it in wine to raise the alcohol content. Not recommended. https://en.wikipedia.org/wiki/1985_diethylene_glycol_wine_scandal http://www.nytimes.com/1986/04/16/garden/antifreeze-poison-found-in-10-wines.html Does that make your blood boil...? Report
January 17, 201610 yr comment_717405 Wine? Enhances high temperature superconductor performance too http://phys.org/news/2011-01-hot-booze-material-superconductor.html Report
May 30, 201610 yr comment_731402 1st post here. Getting ready to go ahead with the build, waiting for the PCB from ebay. I was checking resistors and I found this: I have never come across a Vishay resistor this far off (please no comments on the crappy "multimeter"). Will update once I get the build underway. Thanks KG! Report
May 30, 201610 yr comment_731413 Looks like it's a autoranging meter and probably be better if you could manually set the range to the one lower. That is, if the meter allows you to set the range manually. Cheap meters are sometimes well out of spec when the range is too high. Edited May 30, 201610 yr by wink more info. Report
May 30, 201610 yr comment_731426 I just had the cheapo meter handy for the picture. I checked it with my Amprobe meter, and it measured 500 ohm. The rest of the pack of resistors (from Mouser) measured between 674 and 680 ohm, perfectly within spec of 1%. Report
May 30, 201610 yr Author comment_731430 this is why testing the resistors is easier than figuring out why it does not work later. Report
June 7, 201610 yr comment_731994 Got the power supply built. I got a R-core 50VA transformer, 110V primary and 25V secondary. My mains is at 120V and the measured output from the transformer feeding into the PS was 30.88V. The output from the PS was +23.07V and -23.40V. The boards from ebay are really nice. [edit]Just ordered a toroidal transformer from Antek. The R-core from ebay has a funny solvent smell.[/edit] Report
June 10, 201610 yr comment_732255 Finished stuffing the PCB's. No problems. Bias set at 97mV warm. DC offset -2.3V and -2.4V with the servos. Didn't bother to check without the servos. With the Antek transformer (secondary measured at 25.7V), the PS output was at +22.87V and -23.10V. The BJT's (D44VH10G and D45VH10G) on the PS were running a lot cooler though. Had a brief listen with alligator clips--sounded great. The case from Hifi 2000 should get here tomorrow. Report
June 10, 201610 yr comment_732284 Ah, so that's what happened to the AKG's when I plugged it in...? Oops, I do mean mV. Report
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