chinsettawong Posted June 18, 2016 Report Share Posted June 18, 2016 Impressive! I need to try it too. Sent from my SM-N9005 using Tapatalk Quote Link to comment Share on other sites More sharing options...
Torpedo Posted June 18, 2016 Report Share Posted June 18, 2016 Kerry, you should make a few hundreds of those and organize a group sale Quote Link to comment Share on other sites More sharing options...
JoaMat Posted June 18, 2016 Report Share Posted June 18, 2016 14 hours ago, Kerry said: Thanks. You need to get Fusion 360 and learn how to use it It's from Autodesk and is free to individuals and small businesses. It took me about 3 hours to model these. Downloaded and installed Fusion 360. Have tried it for a short while (raining today). And maybe…. even me might manage to do something with it. Thanks for the tip. Quote Link to comment Share on other sites More sharing options...
Kerry Posted June 19, 2016 Report Share Posted June 19, 2016 There is an ability to do community projects in Fusion 360, which I think is really cool. For anyone wanting to mill foam, there are some precautions. I had an issue with my initial tests when milling to close to the edge. It grabbed a piece of foam and pulled it onto the bit. Not good. I used the duct tape on the one side to give it some stability near that edge. Like everything in milling, make sure your work piece is secured well. Also, for clean final cuts you need to use conventional milling vs. climb milling. This is opposite for aluminum. 3 Quote Link to comment Share on other sites More sharing options...
nopants Posted June 26, 2016 Report Share Posted June 26, 2016 Kerry's work with foam might be a good answer to replacing what's inside the 009 pads. At the very least you wouldn't be paying 250 for a pair... I might implement a bootlegged version of this idea using old 007 foam . Thanks for the inspiration Kerry! 1 Quote Link to comment Share on other sites More sharing options...
spritzer Posted June 26, 2016 Report Share Posted June 26, 2016 It would also be a good way of adding some much needed angle to the 009 pads. Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted July 3, 2016 Author Report Share Posted July 3, 2016 Here is my experimental approach to mounting TO-3 devices without the expense of machining angled brackets. Not the most efficient way to mount things, but maybe it will be good enough. Oh, and yes that's the Harris logo. As it turns out, the IRF240 devices feature larger diameter pins that wouldn't fit in my PCB sockets. The '244 features the same diameter as the IRF9240 as it has it (if you can find them). I would love some Harris 9240 if anyone has a source! Quote Link to comment Share on other sites More sharing options...
kevin gilmore Posted July 3, 2016 Report Share Posted July 3, 2016 how thick is the mounting bracket? Quote Link to comment Share on other sites More sharing options...
Arthrimus Posted July 3, 2016 Report Share Posted July 3, 2016 This is a pro bias to normal bias adapter I cobbled together. It's a self bias circuit that taps R+ and gets chassis ground through an RCA plug to the amp. Just to prove the point of how easily one can build a stax compatible jack I rigged this one together with some female XLR pins, hot glue and a piece of delrin. Take that Mr.Speakers! 3 Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted July 3, 2016 Author Report Share Posted July 3, 2016 how thick is the mounting bracket? Your opinion would be great! It's 6mm bracket, 0.375" copper and then the heatsink back is 8.5mm. Here is a photo: Quote Link to comment Share on other sites More sharing options...
kevin gilmore Posted July 3, 2016 Report Share Posted July 3, 2016 How d'agostino ish i would do the whole thing in copper, but that is stupid expensive. make the holes in the copper a bit big to take care of the thermal expansion differences Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted July 4, 2016 Author Report Share Posted July 4, 2016 Here is one more shot. I just sent off for the Teflon sleeving for the screws and pins. Also a little lab case with some low distortion oscillators, that is in progress. Needed a bit more voltage swing at times than the QA401 could provide. Quote Link to comment Share on other sites More sharing options...
PretentiousFood Posted July 9, 2016 Report Share Posted July 9, 2016 A shunt regulated power supply, with some daughterboards replacing the crappy voltage references I was using in the CCS. 1 Quote Link to comment Share on other sites More sharing options...
PICaudio Posted July 16, 2016 Report Share Posted July 16, 2016 I've finished this fantastic design of Mr. Per-Anders. 4 Quote Link to comment Share on other sites More sharing options...
johnwmclean Posted July 16, 2016 Report Share Posted July 16, 2016 Why only one 3 pin XLR for balanced input? Quote Link to comment Share on other sites More sharing options...
MASantos Posted July 16, 2016 Report Share Posted July 16, 2016 (edited) Long time since I posted around here but I thought I'd come by and show my latest DIY projects: First Watt F4 running on +- 32V At the moment I'm using a Millett Hibrid as preamp until I finish th BA3FE for preamp duties. Salas Folded Phono Stage, waiting for the front and back panels to arive from milling for final assembly. PSU for preamp Edited July 16, 2016 by MASantos 5 Quote Link to comment Share on other sites More sharing options...
MLA Posted July 16, 2016 Report Share Posted July 16, 2016 2 hours ago, johnwmclean said: Why only one 3 pin XLR for balanced input? That's a SE-amp (very fun build by the way, I've built two of them) so I guess it has a twin somewhere waiting to be completed? 1 Quote Link to comment Share on other sites More sharing options...
PICaudio Posted July 16, 2016 Report Share Posted July 16, 2016 Yes, I want to make a second unit to use in other room or use in balanced mode with this amp. Since I have this amplifier I have not returned to use my Beta22 Quote Link to comment Share on other sites More sharing options...
Arthrimus Posted August 24, 2016 Report Share Posted August 24, 2016 (edited) Finding myself in need of a stand for my Lambdas and being unwilling to pay the $75 that Stax wants for the HPS-2, I built my own interpretation for free using of scrap lumber from a previous project. In recent years I've developed an allergy to simple butt joints, so dados and rabbets abound in my version. Edited August 24, 2016 by Arthrimus 7 Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted August 24, 2016 Author Report Share Posted August 24, 2016 Portion of your design is copyrighted by Headphile and the other is very "un Dr. Wood".... 1 Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted October 13, 2016 Author Report Share Posted October 13, 2016 Smoke test passed and the new board fits! 4 Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted October 14, 2016 Author Report Share Posted October 14, 2016 So, the white portions here are the four heatsinks with the rectifier diodes on them, in the above picture. 2 Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted October 14, 2016 Author Report Share Posted October 14, 2016 Side view - two power JFETs per side 4 Quote Link to comment Share on other sites More sharing options...
johnwmclean Posted October 14, 2016 Report Share Posted October 14, 2016 (edited) That’s impressive work Marc. 71°C is very close to my F5X with an ambient of 22°C.....goes to google “seek thermal”. Edited October 14, 2016 by johnwmclean Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted October 15, 2016 Author Report Share Posted October 15, 2016 Well, dealt with this tiny piece of copper for the last few days.... you can imagine what might have occurred. 3 Quote Link to comment Share on other sites More sharing options...
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