February 5, 200917 yr The boards would already be connected to the angled aluminum (done by the builder) Comments? I think this is best, this way the boards can be tested once assembled. Once the heatsink angle iron is fitted, you don't have to worry about undoing it, shipping and risking damage as the end user is trying to refit the angle iron.
February 5, 200917 yr Maybe the prime builders ought to have a separate thread to facilitate the design and integration process, which should include as a minimum: prototype board design and its testing/validation, parts selection and specs, amp chassis integration issues, parts procurement/cost, and assembly/test/distribution issues. Any thoughts?
February 5, 200917 yr Okay cool... I just need to know specs and price range. Let me know when the info is solidified What's hip in toroidals these days? Plitron?
February 5, 200917 yr ok, here's what I'm thinking in terms of responsibility: pars - boards / BJT matching Not sure how I am going to do the boards? Other than that...
February 6, 200917 yr Author wut? I dunno, we like need wire and you seem to always have a lot of it lying around ... I can always give this one to someone else if you aren't up for it!
February 6, 200917 yr Just this... I remember studying partial diff. eqs in college Looks like fluid mechanics or quantum mechanics or something.... That was many beers/years ago.
February 6, 200917 yr I remember studying partial diff. eqs in college Looks like fluid mechanics or quantum mechanics or something.... That was many beers/years ago. Continuum mechanics? Definitely using continuity to simplify.
February 6, 200917 yr I dunno, we like need wire and you seem to always have a lot of it lying around ... I can always give this one to someone else if you aren't up for it! I'm not sure I've ever had that much just laying around. But if you guys want some exotic wire for this project I'll work my contacts and discounts and see how cheaply it can be had.
February 6, 200917 yr Ya'll head on up to Nate's House 'O' Wire. If we don't have the wire you're a lookin' fer, I'll eat a bug. Free cotton candy fer the little uns.
February 6, 200917 yr Pars, Is that Dynafet board design done yet? Fuck you. Still contemplating post 161
February 6, 200917 yr Not quite that far yet, but I'm sure they will. Boards are pretty much done other than putting the transistors in. I also need to decide how i will mount these to the heatsinks (angle bracket or standing up straight onto rectangular section aluminum). SumR transformer on order, plus case. BTW, did anyone happen to download j4cbo's Eagle schematics and/or board files on headwize? Looking at the board, it may be possible to do this in the freeware version of Eagle. Maybe. http://headwize.com/ubb/showpage.php?fnum=3&tid=6584&srch=dynafet; Edited February 6, 200917 yr by Pars
February 6, 200917 yr Not quite that far yet, but I'm sure they will. Boards are pretty much done other than putting the transistors in. I also need to decide how i will mount these to the heatsinks (angle bracket or standing up straight onto rectangular section aluminum). SumR transformer on order, plus case. Did you see my post earlier here. I used an angle aluminum bracket. I have two unpopulated Dynahi boards and one unpopulated Dynahi PSU pcb I ought to put up for sale at some point.
February 6, 200917 yr Yes, I was looking at that as yours is a very well done example of angle bracket. I just always wondered why most people did it that way instead of mounting the output BJTs straight up onto a rectangular section about the thickness of the board offset (3/8") or so? I guess the angle bracket does lend itself to the board mount for that side and all. It would be nice in the Dynafet project to make the boards so they could kinda interchange in a Dynahi as far as mounting, etc. so you could swap boards in the same amp chassis.
February 6, 200917 yr I wonder if Jacob P. is still on Headwize. I bet he might jump at the chance to finish off this board for us...
February 6, 200917 yr Yes, I was looking at that as yours is a very well done example of angle bracket. I just always wondered why most people did it that way instead of mounting the output BJTs straight up onto a rectangular section about the thickness of the board offset (3/8") or so? I guess the angle bracket does lend itself to the board mount for that side and all. It would be nice in the Dynafet project to make the boards so they could kinda interchange in a Dynahi as far as mounting, etc. so you could swap boards in the same amp chassis. Man you read my mind
February 6, 200917 yr I wonder if Jacob P. is still on Headwize. I bet he might jump at the chance to finish off this board for us... Hmm, I wonder. I wasn't sure if he might not even be a regular here or HF... board says Jacob Potter.
February 6, 200917 yr Hmm, I wonder. I wasn't sure if he might not even be a regular here or HF... board says Jacob Potter. I just PMed him at Headwize... let's see what happens.
February 6, 200917 yr First stab at a BOM. I took the Google one from Headwize and started updating it with some info Marc provided. http://home.comcast.net/~youngc1/DynaFET BOM.xls
February 6, 200917 yr I just PMed him at Headwize... let's see what happens. and PMed him on HF (though he has not been there since october)
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