kevin gilmore Posted November 24, 2010 Author Report Share Posted November 24, 2010 No reason to remove it. No reason to hide anything. Put it back if you wish. Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted November 24, 2010 Report Share Posted November 24, 2010 No reason to remove it. No reason to hide anything. Put it back if you wish. Cool, good news! Quote Link to comment Share on other sites More sharing options...
spritzer Posted November 24, 2010 Report Share Posted November 24, 2010 Yup, nothing to hide here. We will never post the original Stax T2 schematic but nothing wrong with this. I'm also going to use that PSU for the milled from solid BH amps but with a delay circuit all on one board. That way I don't need to buy new transformers... Quote Link to comment Share on other sites More sharing options...
Kerry Posted November 24, 2010 Report Share Posted November 24, 2010 Here's the pics of the BH power supply based on the HV supply here: Quote Link to comment Share on other sites More sharing options...
Craig Sawyers Posted November 24, 2010 Report Share Posted November 24, 2010 Here's the pics of the BH power supply based on the HV supply here: The only thing I could mention is something I'm a bit anal about. The capacitor charging current from the bridge diodes is pulse like. The current drawn from the capacitors is pretty smooth. So it is always a good idea to isolate them in the tracking - in other words that the diodes connect individually to the capacitor terminals, and the output connections also connect separately to the capacitor terminals. Otherwise the pulsing current flow from the diodes flows in part of the output tracks and can introduce unnecessary PSU noise. Similar things can be done on the ground side as well to prevent the same pulsed currents from getting into the output grounds - this used to be called the "Calrec rectangle" after its adoption by the microphone company. Quote Link to comment Share on other sites More sharing options...
Kerry Posted November 24, 2010 Report Share Posted November 24, 2010 Nice idea. Thanks for the input. Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted November 24, 2010 Report Share Posted November 24, 2010 Nice idea. Thanks for the input. I'm assuming blue is the bottom layer? Quote Link to comment Share on other sites More sharing options...
Kerry Posted November 26, 2010 Report Share Posted November 26, 2010 The top is blue. I've got the components mounted on top, but the rail transistors mount on the bottom along with the filament transformer. I needed it this way for how I wanted to mount it. Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted November 27, 2010 Report Share Posted November 27, 2010 Ah, just wanted to make sure that big long trace past the pour didn't rely in the solder mask as insulation, but sounds like this isn't the case. Very nice, I really like it. Quote Link to comment Share on other sites More sharing options...
livewire Posted November 29, 2010 Report Share Posted November 29, 2010 Look what the mailman dropped off today.... (click to enlarge) [ATTACH=CONFIG]3987[/ATTACH] Quote Link to comment Share on other sites More sharing options...
Craig Sawyers Posted November 29, 2010 Report Share Posted November 29, 2010 Look what the mailman dropped off today.... (click to enlarge) [ATTACH=CONFIG]3987[/ATTACH] WOOF! Quote Link to comment Share on other sites More sharing options...
deepak Posted November 29, 2010 Report Share Posted November 29, 2010 Nice! Quote Link to comment Share on other sites More sharing options...
Kerry Posted November 30, 2010 Report Share Posted November 30, 2010 It's coming alive! Very cool Quote Link to comment Share on other sites More sharing options...
ujamerstand Posted November 30, 2010 Report Share Posted November 30, 2010 Cool! Build it quickly and tells us what you think! Quote Link to comment Share on other sites More sharing options...
livewire Posted November 30, 2010 Report Share Posted November 30, 2010 Thanksgiving is over, but it's time for this turkey to start the stuffing. And many thanks to Doctor Gilmore for making it possible! Quote Link to comment Share on other sites More sharing options...
spritzer Posted November 30, 2010 Report Share Posted November 30, 2010 Damn, that reminds me to get cracking on the gigantic version for Kevin and me. Bloody hell, too many projects, not enough time. Quote Link to comment Share on other sites More sharing options...
kevin gilmore Posted November 30, 2010 Author Report Share Posted November 30, 2010 I should have my boards by the end of the week. Its going to be a great december... Quote Link to comment Share on other sites More sharing options...
guzziguy Posted November 30, 2010 Report Share Posted November 30, 2010 Damn, that reminds me to get cracking on the gigantic version for Kevin and me. Bloody hell, too many projects, not enough time. You need to quit that dead-end day job of yours. Quote Link to comment Share on other sites More sharing options...
Knuckledragger Posted December 1, 2010 Report Share Posted December 1, 2010 You need to quit that dead-end day job of yours. Then who'd be the bread winner? ...I'll get my coat. Quote Link to comment Share on other sites More sharing options...
cetoole Posted December 1, 2010 Report Share Posted December 1, 2010 Then who'd be the bread winner? ...I'll get my coat. Get me some bread, instead. Quote Link to comment Share on other sites More sharing options...
Lil' Knight Posted December 2, 2010 Report Share Posted December 2, 2010 I've just skimmed pcx to see if I could find anything to take advantage of their 20% off. Just wondering if I could replace the ixys10m90s with this http://www.partsconnexion.com/product7566.html? Also, how does this http://www.partsconnexion.com/product1290.html compare with the one on the BOM? Quote Link to comment Share on other sites More sharing options...
Lil' Knight Posted December 2, 2010 Report Share Posted December 2, 2010 I've just skimmed pcx to see if I could find anything to take advantage of their 20% off. Just wondering if I could replace the ixys10m90s with this http://www.partsconnexion.com/product7566.html? Also, how does this http://www.partsconnexion.com/product1290.html compare with the one on the BOM? Quote Link to comment Share on other sites More sharing options...
Craig Sawyers Posted December 2, 2010 Report Share Posted December 2, 2010 I've just skimmed pcx to see if I could find anything to take advantage of their 20% off. Just wondering if I could replace the ixys10m90s with this http://www.partsconnexion.com/product7566.html? Also, how does this http://www.partsconnexion.com/product1290.html compare with the one on the BOM? The 10m90s is a three terminal current regulator, used here as a protective current limiting device in series with each power supply rail. The parts you are suggesting as replacements are rectifier diodes. There is no substitute to the 10m90s. Quote Link to comment Share on other sites More sharing options...
kevin gilmore Posted December 3, 2010 Author Report Share Posted December 3, 2010 (edited) I'm picking up the boards from the post office in about 2 hours, so time to post the corrected parts list which need to be applied to the bom Heat sink part numbers later. Amplifier board first, There are 2, so double all of this Resistors --------- 2 R1,R2 25 6 R3,R4,R13,R18, 1K R44,R45 2 R5,R6 180 6 R7,R10,R11,R14, 175K R29,R30 2 R8,R9 500 2 R12,R19 1200 4 R15,R16,R35,R37 100 1 R17 20K 1 R26 2k 2 R27,R28 5.1k 4 R31-R34 100K 1 R36 6.8K 2 R38,R39 200K 2 R40,R41 50K 2 R42,R51 10k 1 R43 3.3K 2 R46,R47 200 2 R48,R49 500k 1 R50 300 Transistors ----------- 6 Q1-Q4,Q9,Q10 2sc4686a either 2 x 2sa1968, or 2 x ixtp01n100d 2 Q5,Q6 2sa1968 2 Q7,Q8 ixtp01n100d 2 Q11,Q12 2sc2705 2 Q13,Q14 2sc2240 2 Q15,Q16 2sa1486 2 Q17,Q18 2sa970 Q19 is a Linear systems lsk389 or a pair of 2sk170 1 Q19 k389 1 Q20 2SC1815 Diodes ------ 4 D1,D2,D10,D13 LED 2 D11,D12 1N914 Miscellaneous ------------- 1 RV1 1k 1 RV2 2k Standard current source is Q6,Q5,R8,D2,R9,R10,R11 optional current source is Q8,Q9,R12,R13,R18,R19 power supply board QTY PART-REFS VALUE --- --------- ----- Resistors --------- 3 R1,R9,R39 3000 4 R2,R3,R20,R21 15/2W 4 R4,R6,R22,R25 400k 4 R5,R10,R24,R29 300k 2 R7,R26 62k 8 R8,R11,R14,R16,R27, 820K R30,R33,R35 2 R12,R31 20k 2 R13,R32 280K/1W 4 R15,R17,R34,R36 460k 4 R18,R19,R37,R38 100 4 R40-R42,R44 100k 2 R43,R45 5M Capacitors ---------- 4 C1,C3,C6,C8 680uf 6 C2,C4,C7,C9,C12,C14 100uF 2 C5,C10 .1uF 2 C11,C13 4700uF 4 C17-C20 .1uF/1000v Integrated Circuits ------------------- 1 U3 7815 1 U4 7915 Transistors ----------- 4 Q1,Q2,Q9,Q10 fqpf8n80c 2 Q3,Q11 2sc4686a 8 Q4-Q7,Q12-Q15 2sa1486 2 Q8,Q16 10m90s 2 Q8A,B,Q16A,B 2sc3381 1 Q17 ixys10m90s Diodes ------ 2 D1,D3 24V or 30 volt zeners 4 D2,D4-D6 1N4007 3 D7,D8,D10 150v zener 1 D9 130v zener Miscellaneous ------------- 2 BR1,BR3 BRIDGE made up of 4 high voltage diodes each 2 BR2 2 REF1,REF2 LM4040-10 2 RV1,RV2 2k Edited December 3, 2010 by kevin gilmore Quote Link to comment Share on other sites More sharing options...
kevin gilmore Posted December 3, 2010 Author Report Share Posted December 3, 2010 make that 2 BR2,BR3 BRIDGE made up of 4 high voltage diodes each 1 BR1 Quote Link to comment Share on other sites More sharing options...
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