xianghao Posted March 15, 2015 Report Posted March 15, 2015 does the DACT go on the other side of the board or on top? on the top,maybe
xianghao Posted March 15, 2015 Report Posted March 15, 2015 Hi HS, What headphones are you using with this amp?i it seems like the koss esp950. the bias is different. 950 bias: 600v stax pro socket: 580v
HemiSam Posted March 15, 2015 Report Posted March 15, 2015 Photobucket is giving me a hard time with the rotation of pictures so hopefully these come out OK. As I didn't make this beautiful amp I'm guessing, but it looks like the finish on the face plate is a satin silver powdercoat. It is very nice and feels substantial. Here are a few shots that should provide a better idea of texture on the front and rear plates, as well as, give a view of the connections and how I'm using it currently. Thanks for all the kind words. KG, Birgir, and Geoff deserve the acolades. All I had to do is buy and enjoy. The Koss cans are now all they can be in my estimation. HS
headinclouds Posted March 15, 2015 Report Posted March 15, 2015 Really nice! What finish did you use on the face plate? The case is all aluminium is bead-blasted, brightened and anodised either grey or silver.
headinclouds Posted March 15, 2015 Report Posted March 15, 2015 (edited) I'm mucking about in imgur, let's see if this pic pastes in: Edited March 15, 2015 by headinclouds 3
insanity Posted March 15, 2015 Report Posted March 15, 2015 Very nice work indeed. I like the inside off-board heatsink. Probably total overkill, but very nice! Does this one run at 400V?
HemiSam Posted March 15, 2015 Report Posted March 15, 2015 The heat sink is extremely effective. I live in Houston, TX so having something that runs cooler especially during the summer is a big bonus. I've run the amp for several hours at a time. My DAC is sitting back on the KGST as can be seen in the pics above. The DAC is relatively small and I lay a thin magazine under it away from the cooling vents on the amp. DAC stays comfortably cool...no problem. HS
Pars Posted March 15, 2015 Report Posted March 15, 2015 Very nice work indeed. I like the inside off-board heatsink. Probably total overkill, but very nice! Does this one run at 400V? Agreed. Very nicely done. I like the faceplate treatment around the volume knob as well.
purk Posted March 15, 2015 Report Posted March 15, 2015 Many thanks for the picture Sam & Geoff. Any chance you will be able to add a pair of XLR loop out on the back plate? Love every aspect about this amp. Your chassis work is super sweet.
headinclouds Posted March 15, 2015 Report Posted March 15, 2015 Many thanks for the picture Sam & Geoff. Any chance you will be able to add a pair of XLR loop out on the back plate? Love every aspect about this amp. Your chassis work is super sweet. It's possible but does Sam want one?
HemiSam Posted March 15, 2015 Report Posted March 15, 2015 So far all my cans and my DACs are single ended so I've not gone balanced (personally or with my audio ). Sounds so darn good to me single ended I haven't felt the need, but I'm no expert on balanced vs single ended. HS
purk Posted March 15, 2015 Report Posted March 15, 2015 So far all my cans and my DACs are single ended so I've not gone balanced (personally or with my audio ). Sounds so darn good to me single ended I haven't felt the need, but I'm no expert on balanced vs single ended. HS I believe the circuit of any electrostat amps are balanced in nature anyway. So if you are feeding singled end signal, it will eventually be converted balanced signal.
kevin gilmore Posted March 15, 2015 Author Report Posted March 15, 2015 every direct drive electrostatic amp i know of is balanced. the luminare piece of crap drives the transformer unbalanced only with asymetrical drive, and has very different rise and fall slew rates.
HemiSam Posted March 16, 2015 Report Posted March 16, 2015 That's a fair point as the single connector does have R+/R1 and L+/L-...thanks for enlightening this electrical dummy. I'm feeding the KGST the analog signal from a single ended DAC although it's via R/L RCA's to Neutrik connectors. I do not possess the golden ears some seem to on another forum, but the rig sounds very nice, especially with streaming FLAC files. The KGST has clearly taken the Koss to another level. Their limits at right there with this amp. I'm pleased as punch. HS
xianghao Posted March 16, 2015 Report Posted March 16, 2015 I'm mucking about in imgur, let's see if this pic pastes in: so nice. i like this style. Especially the large heat sink.
Earspeakers Posted March 16, 2015 Report Posted March 16, 2015 I'm mucking about in imgur, let's see if this pic pastes in: Beautiful Geoff. Is that design one others could use?
Earspeakers Posted March 16, 2015 Report Posted March 16, 2015 Hey does anybody have a source for the .1uF/1000VDC film caps in the KGST power supply? The lead spacing is approximately 18.3mm and Mouser/Digikey seems to stock only 22mm leads
xianghao Posted March 16, 2015 Report Posted March 16, 2015 Hey does anybody have a source for the .1uF/1000VDC film caps in the KGST power supply? The lead spacing is approximately 18.3mm and Mouser/Digikey seems to stock only 22mm leads i seems that all of the .1uf/1kv caps has been sold out. i found them from : http://item.taobao.com/item.htm?spm=a230r.1.14.21.MoH6lI&id=35902201607&ns=1&abbucket=11#detail but i do not know whether they are fake.i will buy some to check.
mwl168 Posted March 16, 2015 Report Posted March 16, 2015 I wouldn't use the KGSSHV psu as it just doesn't like that load. No mods possible with that PSU board which is why we are slowly working on a new one. Hi Birgir: I and a couple others are planning a KGST build. We are thinking about using the kgsshvpsminifinalstn9360 version of PSU. Is this a bad idea? If so, can you elaborate and recommend a PSU to optimize the performance of the KGST? Thanks!
spritzer Posted March 16, 2015 Report Posted March 16, 2015 (edited) Plenty of 100nf/1000V caps to be found. This one should work just fine: http://www2.mouser.com/ProductDetail/Kemet/PHE426PB6100JR06/?qs=sGAEpiMZZMv1cc3ydrPrF85GIl804cbNm959%252bOSJvME%3d Cheap too. Hi Birgir: I and a couple others are planning a KGST build. We are thinking about using the kgsshvpsminifinalstn9360 version of PSU. Is this a bad idea? If so, can you elaborate and recommend a PSU to optimize the performance of the KGST? Thanks! You can use that PSU but you could have problems. Plus nobody has ever built that PSU there might be massive problems. I just found out over the weekend that the layout software we use has a brand new way of fucking us over with no warning. Stick with the BHSE unit. Edited March 16, 2015 by spritzer
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