s_r Posted November 19, 2014 Report Share Posted November 19, 2014 It's the PSU from headincloud's group buy (V1.0). My LV caps are slightly too large at 12.5mm in diameter, so I had to lift them off the board a little. Quote Link to comment Share on other sites More sharing options...
Laowei Posted November 19, 2014 Report Share Posted November 19, 2014 Very nice! Quote Link to comment Share on other sites More sharing options...
johnwmclean Posted November 19, 2014 Report Share Posted November 19, 2014 Beautiful work s_r Quote Link to comment Share on other sites More sharing options...
headinclouds Posted November 19, 2014 Report Share Posted November 19, 2014 That's a very striking design s_r, very attractive. Hope you're enjoying the sound quality. Quote Link to comment Share on other sites More sharing options...
spritzer Posted November 19, 2014 Report Share Posted November 19, 2014 That is excellent work!! Quote Link to comment Share on other sites More sharing options...
valve5425 Posted November 19, 2014 Report Share Posted November 19, 2014 1st post here so, Hi folks! @ s_r Great job! I've just got myself a KGST board set, tubes and Stax socket and am currently getting everything else together for the build. My downfall is that I rarely finish the chassis's on my projects, so I've made the decision with this one to get the chassis sorted before I start soldering! There's will-power for you! Anyway, did Modushop do all the work on the enclosure, i.e. top and front panels, or did you get them done somewhere else? Thanks. Quote Link to comment Share on other sites More sharing options...
insanity Posted November 19, 2014 Report Share Posted November 19, 2014 (edited) @ s_r nice build, much more compact than mine. I wanted a frontpanel without screws though. I just noticed that your replacements for the 1.5k resistor look quite small. Hope they can handle the dissipation. Are they 1/2 or 1/4W? Edited November 19, 2014 by insanity Quote Link to comment Share on other sites More sharing options...
spritzer Posted November 19, 2014 Report Share Posted November 19, 2014 Good point, those have to be 1/2W. Quote Link to comment Share on other sites More sharing options...
s_r Posted November 19, 2014 Report Share Posted November 19, 2014 (edited) They're rated for 1W/350V. I was surprised at how small they were though. http://ca.mouser.com/Search/ProductDetail.aspx?R=PR01000101501JA100virtualkey59420000virtualkey594-5073NW1K500JA100 @valve All the enclosure work was done with modushop. Edited November 19, 2014 by s_r Quote Link to comment Share on other sites More sharing options...
spritzer Posted November 19, 2014 Report Share Posted November 19, 2014 Those should be fine. Quote Link to comment Share on other sites More sharing options...
chinsettawong Posted November 19, 2014 Report Share Posted November 19, 2014 Nice work s_r. Quote Link to comment Share on other sites More sharing options...
Dave R Posted November 20, 2014 Report Share Posted November 20, 2014 Silver faceplate and volume knob with a matt black enclosure is my favourite look for audio equipment, so your amp looks very nice s_r. Congrats. Quote Link to comment Share on other sites More sharing options...
nopants Posted November 21, 2014 Report Share Posted November 21, 2014 lots of 6s4a quads popping up on ebay, I'm assuming GE and RCA are the main manufacturers? Are Sylvania, etc. just rebrands? Quote Link to comment Share on other sites More sharing options...
Laowei Posted November 21, 2014 Report Share Posted November 21, 2014 (edited) That's correct. The ones etched USA with grey plates are GE, and black plates are RCA. Those are often rebranded. There are also rare printed Japan manufactured 6S4As that have black plates. I am unaware of any European manufactured equivalents. Late edit: ECG Philips branded grey plates are a different internal contruction from the GE. The Sylvanias I've seen are rebranded Philips. Edited November 30, 2014 by Laowei Quote Link to comment Share on other sites More sharing options...
Pars Posted November 21, 2014 Report Share Posted November 21, 2014 (edited) Very nice job! Tight though. BTW, where did headinclouds run a group buy? Edited November 21, 2014 by Pars Quote Link to comment Share on other sites More sharing options...
spritzer Posted November 21, 2014 Report Share Posted November 21, 2014 Here. Quote Link to comment Share on other sites More sharing options...
nopants Posted November 21, 2014 Report Share Posted November 21, 2014 I have a single spare channel if you can find an appropriate partner for it Quote Link to comment Share on other sites More sharing options...
spritzer Posted November 21, 2014 Report Share Posted November 21, 2014 Mono FTW!!!! Quote Link to comment Share on other sites More sharing options...
gepardcv Posted November 21, 2014 Report Share Posted November 21, 2014 I finished my KGST recently. Since I'm still gathering parts, a couple of questions: 1. What is the blue cable you ran from the inputs to the volume pot? Is it shielded? 2. Where did you get the PCBs connected to the inputs (which I assume are XLR)? Thanks! Quote Link to comment Share on other sites More sharing options...
johnwmclean Posted November 21, 2014 Report Share Posted November 21, 2014 It definitely looks like a balanced (shielded) cable. I prefer using a standard two core audio cable rather than a balanced (shielded) cable within the amp. Rather than drag the shield through the amp, I connect it directly to the chassis at point of entry (the Neutrik DLX series have a feature just for this) with the shortest piece of wire possible. “Balanced cable shields should function as an extension of the enclosure.” (Raine notes) Spritzer has those PCB’s. 1 Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted November 21, 2014 Report Share Posted November 21, 2014 Yeah, this is definitely the right idea. Quote Link to comment Share on other sites More sharing options...
s_r Posted November 21, 2014 Report Share Posted November 21, 2014 The blue cable is some sommer microphone cable. I forget the exact model, but it is shielded. The input PCBs I got from spritzer. I'd follow john's advice though. Quote Link to comment Share on other sites More sharing options...
chiguy Posted December 3, 2014 Report Share Posted December 3, 2014 I've finished building a KGST and it sounds amazing. Much thanks to the Stax Mafia for an awesome design and making all of this possible, Headinclouds for the group buy, and everyone here for your help and assistance! So I gave one of the two KGSTs I was building as a wedding gift to a friend who just so happens to be a photographer and he gave me in return some pictures of it. I'm still finishing up the other one but here is the finished one. The rest of the photos are here: http://adhikariphoto.smugmug.com/Portraits/KGST/n-9GZfc/ 8 Quote Link to comment Share on other sites More sharing options...
Laowei Posted December 3, 2014 Report Share Posted December 3, 2014 Very very nice buld chiguy! Where did you get the rear panel printing done? Quote Link to comment Share on other sites More sharing options...
PretentiousFood Posted December 3, 2014 Report Share Posted December 3, 2014 That's some pretty fantastic casework. That recessed knob Quote Link to comment Share on other sites More sharing options...
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