G600 Posted August 11, 2015 Report Share Posted August 11, 2015 Yes I did compare, but it's suspect. Quote Link to comment Share on other sites More sharing options...
GeorgeP Posted August 11, 2015 Report Share Posted August 11, 2015 That is the slightly shorter board - I can confirm that it works as it should. The two middle rows are for setting the voltage. Quote Link to comment Share on other sites More sharing options...
G600 Posted August 11, 2015 Report Share Posted August 11, 2015 Yep, a shrunk blue board.But the one I have on hands have connection between each and every one of the 6 holes, both vertically and horizontally.Of course nothing is soldered to it yet. Quote Link to comment Share on other sites More sharing options...
GeorgeP Posted August 11, 2015 Report Share Posted August 11, 2015 sorry, are you saying the traces on your board don't match the image you posted above? Quote Link to comment Share on other sites More sharing options...
G600 Posted August 11, 2015 Report Share Posted August 11, 2015 Yes, this is the only area of both boards with bad looking traces around the holes,making undue connections.Think I'm going to salvage them, helped by the gerber's bottom copper traces. Quote Link to comment Share on other sites More sharing options...
GeorgeP Posted August 11, 2015 Report Share Posted August 11, 2015 so the solder pads are touching? Can you post a photo? The shrunk boards I have match the the Gerber perfectly, with no slop. Quote Link to comment Share on other sites More sharing options...
G600 Posted August 11, 2015 Report Share Posted August 11, 2015 I may post a picture if I can catch it with my crappy phone.It looks like leaking copper around the holes, but I can also see direct connections between adacent holes. Quote Link to comment Share on other sites More sharing options...
G600 Posted August 11, 2015 Report Share Posted August 11, 2015 You can clearly see the "leakage", but at a second look you may peek traces between second and upper third row. Quote Link to comment Share on other sites More sharing options...
GeorgeP Posted August 11, 2015 Report Share Posted August 11, 2015 I see, that is something I have never seen before - so there is copper under the solder resist that is creating a bridge between the pads where there shouldn't be any continuity. So your time delay would have had no effect and the amp would be on immediately.I checked my boardset, and it doesn't have this extra copper - not sure what happened there. Also the through-holes seem to poke out a bit past the solder pads, but I am guessing that hasn't turned out to be an issue.Did want to mention that I will likely be unloading my extra boardset as it is unlikely that I will be using it. The boards are 4oz copper and 3mm thick, so this is only for people who know what they are doing. The amp board is the shorter version that can use off the shelf 400mm heatsinks (no need for custom pieces). Quote Link to comment Share on other sites More sharing options...
kevin gilmore Posted August 12, 2015 Report Share Posted August 12, 2015 hard to see if its really copper from that angle, but what probably happened is that the photo mask liftedat the edge and caused that. Quote Link to comment Share on other sites More sharing options...
G600 Posted August 12, 2015 Report Share Posted August 12, 2015 I was sure there was a technical explanation.I started to salvage the traces, and copper it is. 4 oz. Damn hard to get rid of. Those boards are borderline too much overkill. Quote Link to comment Share on other sites More sharing options...
spritzer Posted August 13, 2015 Author Report Share Posted August 13, 2015 Look what was finally brought back to life yesterday.... This has a new board as I could never find out what was wrong with the old one. Might have found it though... Anyway, nice to have it alive and kicking. Btw. If anybody needs any of the hard to get Xicon resistors used in this, drop me a line. I bought a lot of them... a lot!!!! 6 Quote Link to comment Share on other sites More sharing options...
blubliss Posted August 13, 2015 Report Share Posted August 13, 2015 Finally! Good on ya' Quote Link to comment Share on other sites More sharing options...
GeorgeP Posted August 14, 2015 Report Share Posted August 14, 2015 Yes, that is awesome news!And never thought of moving the LEDS to the topside - means you don't have to start it up on its side with both covers off - great idea. Probably want the 22k resistor topside as well.What testpoints are those? Quote Link to comment Share on other sites More sharing options...
GeorgeP Posted August 14, 2015 Report Share Posted August 14, 2015 Also, did you end up going with the 4686 or did you go 3675? Quote Link to comment Share on other sites More sharing options...
Kerry Posted August 14, 2015 Report Share Posted August 14, 2015 Very nice!Congrats Quote Link to comment Share on other sites More sharing options...
Hennyo Posted August 14, 2015 Report Share Posted August 14, 2015 Wonderful, nice job! Quote Link to comment Share on other sites More sharing options...
chinsettawong Posted August 14, 2015 Report Share Posted August 14, 2015 Putting all the leds on the top side is an excellent idea. Congrats! Quote Link to comment Share on other sites More sharing options...
spritzer Posted August 14, 2015 Author Report Share Posted August 14, 2015 Thanks. Having it to play with means I'll probably never build any more of this. Might finish the three PCB's I have but it would be insane to try and sell this beast. Even with this updated layout it is still a chore to build. Also, did you end up going with the 4686 or did you go 3675?This one is completely stock, Xicon parts everywhere and all the stock sand. I even used the 1486's where KSA1156's would have worked just fine. The test points are just some teflon units off ebay but they work perfectly. Since this was a custom PCB I spaced them further apart to the test leads would fit comfortably. Quote Link to comment Share on other sites More sharing options...
GeorgeP Posted August 14, 2015 Report Share Posted August 14, 2015 Thanks. Having it to play with means I'll probably never build any more of this. Might finish the three PCB's I have but it would be insane to try and sell this beast. Even with this updated layout it is still a chore to build. Yeah, its like the Ironman of amp builds... and that is if nothing goes wrong... commercial viability = 0. Quote Link to comment Share on other sites More sharing options...
nopants Posted August 19, 2015 Report Share Posted August 19, 2015 Saw this on Schiit's website, made me think of those users who were opting for the SS input stage on their T2s:http://schiit.com/products/lisst-tubesI dig the aesthetics Quote Link to comment Share on other sites More sharing options...
UFN Posted August 19, 2015 Report Share Posted August 19, 2015 Saw them as well - and immediately started dreaming up around 57 potential ways to violate Schist's advice of "Do not use these in other products" //UFN Quote Link to comment Share on other sites More sharing options...
Earspeakers Posted August 30, 2015 Report Share Posted August 30, 2015 Interest check for a group buy for T2 boards. I have a quote from Custom Circuit boards for $125/amp, $100 PSU, ENIG, 2.36mm, 3oz copper, 100% e tested in quantity 4 each. These are the shortened boards, GeorgeP has verified the PSU is good (we've already got a set each). I want one, if three others are interested I'll do the buy. PM me if interested, if I don't get enough interest here I'll do a separate post to call it out. Quote Link to comment Share on other sites More sharing options...
chiguy Posted August 31, 2015 Report Share Posted August 31, 2015 Are these boards with new or old sand? Quote Link to comment Share on other sites More sharing options...
Earspeakers Posted August 31, 2015 Report Share Posted August 31, 2015 Are these boards with new or old sand?No sand, just the PCB's. We've done a run of 4 boards already and the PS has been built out and tested as mentioned and the Gerbers have been previously fully built out and verified by others. Correction to above, these are not the shortened boards. Quote Link to comment Share on other sites More sharing options...
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