January 13, 201610 yr 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.
January 15, 201610 yr 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
January 15, 201610 yr Supercomputers combine high voltage and water cooling. But these are multi-million dollar systems built by people who actually know what they're doing.
January 16, 201610 yr 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.
January 16, 201610 yr Author pure ethylene glycol. I use it by the gallon to cool the xray cameras. slightly toxic.
January 16, 201610 yr 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
January 17, 201610 yr 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.....
January 17, 201610 yr 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.
January 17, 201610 yr 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...?
January 17, 201610 yr Wine? Enhances high temperature superconductor performance too http://phys.org/news/2011-01-hot-booze-material-superconductor.html
May 30, 201610 yr 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!
May 30, 201610 yr 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.
May 30, 201610 yr 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%.
May 30, 201610 yr Author this is why testing the resistors is easier than figuring out why it does not work later.
June 7, 201610 yr 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]
June 10, 201610 yr 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.
June 10, 201610 yr Ah, so that's what happened to the AKG's when I plugged it in...? Oops, I do mean mV.
Please sign in to comment
You will be able to leave a comment after signing in
Sign In Now