Nebby Posted August 22, 2013 Report Share Posted August 22, 2013 Count me in for chassis, boards, and parts from sato denki. Dunno about the spikes though Quote Link to comment Share on other sites More sharing options...
deepak Posted August 22, 2013 Report Share Posted August 22, 2013 Glad to hear there will be more of these out in the wild Quote Link to comment Share on other sites More sharing options...
Lil Knight Posted August 22, 2013 Report Share Posted August 22, 2013 Prolly a dumb question - does the case buy include the heatsinks? Yes, of course. I mentioned the height Quote Link to comment Share on other sites More sharing options...
n3rdling Posted August 22, 2013 Report Share Posted August 22, 2013 In for everything Quote Link to comment Share on other sites More sharing options...
PICaudio Posted August 22, 2013 Report Share Posted August 22, 2013 I'm in for board set. -- o -- Rodrigo Quote Link to comment Share on other sites More sharing options...
justin Posted August 22, 2013 Report Share Posted August 22, 2013 is anyone interested in a PEEK screw group buy? (posting in the KGSSHV thread as well) Quote Link to comment Share on other sites More sharing options...
GeorgeP Posted August 22, 2013 Report Share Posted August 22, 2013 Yes. Quote Link to comment Share on other sites More sharing options...
kevin gilmore Posted August 22, 2013 Report Share Posted August 22, 2013 (edited) peek screws are absolutely required for T2! and a really good idea for all the ixys parts Edited August 22, 2013 by kevin gilmore Quote Link to comment Share on other sites More sharing options...
shipsupt Posted August 22, 2013 Report Share Posted August 22, 2013 Justin, if we can participate from the UK, definitely. Quote Link to comment Share on other sites More sharing options...
n3rdling Posted August 22, 2013 Report Share Posted August 22, 2013 Very interested Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted August 22, 2013 Report Share Posted August 22, 2013 peek screws are absolutely required for T2! and a really good idea for all the ixys parts I agree with previous posts that they don't provide enough torque. Quote Link to comment Share on other sites More sharing options...
holland Posted August 22, 2013 Report Share Posted August 22, 2013 PEEK screws are useful to have around for general use. What sizes are you thinking of? Interested. Quote Link to comment Share on other sites More sharing options...
JoaMat Posted August 22, 2013 Report Share Posted August 22, 2013 In my opinion nylon shoulder washer (mouser # 534-9902) and stainless screws will do. Cheaper then PEEK and you can apply “correct” torque. Quote Link to comment Share on other sites More sharing options...
kevin gilmore Posted August 22, 2013 Report Share Posted August 22, 2013 That's the wrong part number and those are not rated for 500v. I had one punch Thru. There are versions that are rated for the voltage but they don't fit the Required transistors for the t2. Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted August 22, 2013 Report Share Posted August 22, 2013 Nylon 6/6 should be properly rated. What am I missing? Quote Link to comment Share on other sites More sharing options...
kevin gilmore Posted August 23, 2013 Report Share Posted August 23, 2013 (edited) Actually it was more like 650 volts where they blew thru on the Original t2 power supply. Pictures were posted. Unreg primary On the anode of the current limiters. The same would be true For the bias current source. The Polyphenylene Sulfide ones are the only ones actually rated for the voltage and they are an impossible fit for the 2sc3675. This, but like I said, a very tight fit http://www.futureelectronics.com/en/technologies/electromechanical/thermal-management/thermal-tapes/Pages/1303239-7721-3PPSG.aspx?IM=0 The cap head version of the peek screws are just about impossible to overtighten. I have tried. Also a fair amount less capacitance to ground. For the 2sk216 and 2sj79 definitely a good idea. Edited August 23, 2013 by kevin gilmore Quote Link to comment Share on other sites More sharing options...
justin Posted August 23, 2013 Report Share Posted August 23, 2013 I agree with previous posts that they don't provide enough torque. what are you using instead? a metal screw? i havent personally had problems with a metal screw and a nylon shoulder washer, though i havent done anything with unregulated voltages as high as Kevin mentions. though from outsourcing assembly on things like this i cant trust them to properly use a shoulder washer. then again i also cant trust them to properly torque the plastic screws.. Quote Link to comment Share on other sites More sharing options...
JoaMat Posted August 23, 2013 Report Share Posted August 23, 2013 (edited) That's the wrong part number and those are not rated for 500v. I had one punch Thru. There are versions that are rated for the voltage but they don't fit the Required transistors for the t2. Yes, that was wrong part number. I’m sorry - it was late and I mixed up the numbers. I use the insulating washer # 7721-3PPSG and I use a tool to press the washer in place. So far it works without problems for me. I have two working T2 and some other stuff. But I can see the advantages using PEEK screws and it seems that the torque they provide is good enough. Edited August 23, 2013 by JoaMat Quote Link to comment Share on other sites More sharing options...
justin Posted August 23, 2013 Report Share Posted August 23, 2013 i think thats the same one i used to use. the one that is thicker than the TO-220 so the washer extends into the aluminum oxide insulator. getting the washer to line up with the hole in the insulator was annoying. i just found that overall the PEEK screws were more idiot proof for contract assembly. how many cracked washers would i get and never know about? Quote Link to comment Share on other sites More sharing options...
Lil Knight Posted August 23, 2013 Report Share Posted August 23, 2013 What's the estimated price? I am in for at least 200pcs. Quote Link to comment Share on other sites More sharing options...
JoaMat Posted August 23, 2013 Report Share Posted August 23, 2013 (edited) / Edited November 12, 2015 by JoaMat Quote Link to comment Share on other sites More sharing options...
kevin gilmore Posted August 23, 2013 Report Share Posted August 23, 2013 One other thing to point out, the shoulder washer does not work for The to126 anyway. Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted August 23, 2013 Report Share Posted August 23, 2013 Isnt the TO126 by definition have a plastic case? Again maybe it helps dumb assemblyman but a proper insulator and a stainless screw should be fine. Bonus points of you use a belleville washer on top. Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted August 23, 2013 Report Share Posted August 23, 2013 When I started to press them into place I avoided the cracking. But my concern now is what happens with the washers after a long time (years) and the heat. Will they become hard and therefore crack or fell apart? Time will tell. I think I better get some PEEKs. Justin, I'm in for 200 pcs. Thank you. With the PEEK screws the question is whether you need to use loktite. I think Inu did. If this is the case this presents a another issue other than the fact that you will get decreased device life from improper torque. I dont see it an obvious choice. Justin may have a point given his situation. Others not sure. Quote Link to comment Share on other sites More sharing options...
kevin gilmore Posted August 23, 2013 Report Share Posted August 23, 2013 2sa1486 has exposed collector on the back side. and extra capacitance from metal screw on t2 definitely an issue in all of the current sources where they are used. also capacitance is an very important issue for the 2sc3675 in the battery. Quote Link to comment Share on other sites More sharing options...
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