johnwmclean Posted August 6, 2016 Report Share Posted August 6, 2016 8 hours ago, Dave R said: or part building. Only the left channel then? 2 Quote Link to comment Share on other sites More sharing options...
Dave R Posted August 6, 2016 Report Share Posted August 6, 2016 28 minutes ago, johnwmclean said: Only the left channel then? The reason I put " part build " John is because my local engineer will ( hopefully ) be doing the chassis work, obviously you'll be doing the biggest part of this build which I appreciate very much. ? 6 hours ago, purk said: Great choice for going with John. His builds are unique and always first class. Gotta love his custom chassis! If everything works out, then John will be in liaise with my local metal engineer. The only thing that could be a problem is this engineer who's name is also Dave, runs his business alone, and it doesn't look like he has a website, but the next time I see him I'll ask if he has as email address. Quote Link to comment Share on other sites More sharing options...
gwrskien Posted August 6, 2016 Report Share Posted August 6, 2016 Is there a big difference between Carbon v5 and v6? I have v5`s from earlier GB. Dave R: you probably know this, but Modushop/HiFi2000 does custom work as well.. Thank`s Quote Link to comment Share on other sites More sharing options...
sorenb Posted August 6, 2016 Report Share Posted August 6, 2016 31 minutes ago, gwrskien said: Is there a big difference between Carbon v5 and v6? I have v5`s from earlier GB. Dave R: you probably know this, but Modushop/HiFi2000 does custom work as well.. Thank`s 3 mm less depth and two extra holes, apart from that none. Kevin released a V6 with ground plane, which the previous Carbons didn't have. 1 Quote Link to comment Share on other sites More sharing options...
johnwmclean Posted August 6, 2016 Report Share Posted August 6, 2016 ... and V6 silkscreen updated to 120ohm resistor (V5 was 182ohm). Quote Link to comment Share on other sites More sharing options...
gwrskien Posted August 6, 2016 Report Share Posted August 6, 2016 Okay, thank you Quote Link to comment Share on other sites More sharing options...
Dave R Posted August 6, 2016 Report Share Posted August 6, 2016 2 hours ago, gwrskien said: Dave R: you probably know this, but Modushop/HiFi2000 does custom work as well.. Thank`s I wasn't aware of that place, but I'll be using my local metal engineer ( assuming he'll want the job ) in liaise with John. I also had an idea on how I'd like the faceplate to look with the controls positioned in a certain way, but John sent me a computer drawing of a faceplate with a slightly different controls position that I prefer to the one I did. So by the time John and I have worked out how this Carbon will look, it'll be very much to my liking. Now John did ask me why I wanted the Carbon so big, 17"W x 7"H x 14"D approx, but after I showed him the shelf on my audio rack where it'd be going, he understood why, I also mentioned to John that the width of my Bybee power purifier is also 17". ? Quote Link to comment Share on other sites More sharing options...
sorenb Posted August 6, 2016 Report Share Posted August 6, 2016 2 hours ago, Dave R said: I wasn't aware of that place, but I'll be using my local metal engineer ( assuming he'll want the job ) in liaise with John. I also had an idea on how I'd like the faceplate to look with the controls positioned in a certain way, but John sent me a computer drawing of a faceplate with a slightly different controls position that I prefer to the one I did. So by the time John and I have worked out how this Carbon will look, it'll be very much to my liking. Now John did ask me why I wanted the Carbon so big, 17"W x 7"H x 14"D approx, but after I showed him the shelf on my audio rack where it'd be going, he understood why, I also mentioned to John that the width of my Bybee power purifier is also 17". ? Interesting. Had a look at Byebe Tech's homepage. Are you planning on using some Quantum Slipstream Purifiers for the Carbon build? Quote Link to comment Share on other sites More sharing options...
Dave R Posted August 6, 2016 Report Share Posted August 6, 2016 19 minutes ago, sorenb said: Interesting. Had a look at Byebe Tech's homepage. Are you planning on using some Quantum Slipstream Purifiers for the Carbon build? Maybe ? Quote Link to comment Share on other sites More sharing options...
eggil Posted August 6, 2016 Report Share Posted August 6, 2016 Any significant changes on the v6 BOM from v5? Quote Link to comment Share on other sites More sharing options...
mwl168 Posted August 6, 2016 Author Report Share Posted August 6, 2016 (edited) 7 hours ago, eggil said: Any significant changes on the v6 BOM from v5? No, except for the 120R tail resistors (182R on V5 board) of the offset trim pot John pointed out. Although I believe I made this update in the V5 BOM in the previous GB already. The 120R provides greater adjustment range that allows for 20mA output device current. Edited August 7, 2016 by mwl168 Quote Link to comment Share on other sites More sharing options...
Dave R Posted August 7, 2016 Report Share Posted August 7, 2016 After advice from John, the size of the Carbon he'll eventually be doing for me will be 17"W x 6"H x 14"D. Quote Link to comment Share on other sites More sharing options...
sorenb Posted August 7, 2016 Report Share Posted August 7, 2016 47 minutes ago, Dave R said: After advice from John, the size of the Carbon he'll eventually be doing for me will be 17"W x 6"H x 14"D. quite surprising! are you sure John didn't advice on 17"W x 6.5"H x 10.5"D ? 2 Quote Link to comment Share on other sites More sharing options...
Dave R Posted August 7, 2016 Report Share Posted August 7, 2016 (edited) Deleted. Edited August 8, 2016 by Dave R Quote Link to comment Share on other sites More sharing options...
eggil Posted August 9, 2016 Report Share Posted August 9, 2016 ould somebody point me towards a JPEG file of the carbon 6 and PSU as well as the schematics for both? I Quote Link to comment Share on other sites More sharing options...
kevin gilmore Posted August 9, 2016 Report Share Posted August 9, 2016 (edited) here is the latest amp board picture without the ground plane http://gilmore.chem.northwestern.edu/kgsshvcarbonv6.jpg with ground plane http://gilmore.chem.northwestern.edu/kgsshvcarbonv6g.jpg and latest schematic http://gilmore.chem.northwestern.edu/kgsshvcarbonv5.pdf and two of the many power supplies http://gilmore.chem.northwestern.edu/kgsshvcarbonpsleft.jpg http://gilmore.chem.northwestern.edu/kgsshvcarbonpsright.jpg older power supply schematic without the on/off switch http://gilmore.chem.northwestern.edu/goldenreferencehvsic.pdf Edited August 9, 2016 by kevin gilmore Quote Link to comment Share on other sites More sharing options...
eggil Posted August 10, 2016 Report Share Posted August 10, 2016 (edited) Thanks! Could not find them anywhere. I am going to start my build soon and is hard to do it without them Edited August 10, 2016 by eggil Quote Link to comment Share on other sites More sharing options...
yuk228 Posted August 18, 2016 Report Share Posted August 18, 2016 I have a question regarding the LED on Carbon amp board. I scanned through the posts and 1.7V Red LED is recommended. But I would like to extend the LED to the panel to indicate 4 rails therefore I want to pick white/blue LED instead of red. However, I checked all Blue/White LED sold in Mouser, all of them are with forward voltage 3V above. In this case, 1. Quote Link to comment Share on other sites More sharing options...
kevin gilmore Posted August 18, 2016 Report Share Posted August 18, 2016 the led's drive the current sources. red only, and do not extend for any reason. Quote Link to comment Share on other sites More sharing options...
yuk228 Posted August 18, 2016 Report Share Posted August 18, 2016 2 hours ago, kevin gilmore said: the led's drive the current sources. red only, and do not extend for any reason. Thanks Kevin. In this case, Can I make use of the output of the GRLV (+15/-15V) to power up two LED for front panel indication? Quote Link to comment Share on other sites More sharing options...
GeorgeP Posted August 18, 2016 Report Share Posted August 18, 2016 you could, but why would you need two? What would that tell you? Quote Link to comment Share on other sites More sharing options...
yuk228 Posted August 18, 2016 Report Share Posted August 18, 2016 18 minutes ago, GeorgeP said: you could, but why would you need two? What would that tell you? One for positive and one for negative rail...is this weird? I am drawing CAD and going to submit it to Hifi2000 for case customization. Quote Link to comment Share on other sites More sharing options...
kevin gilmore Posted August 18, 2016 Report Share Posted August 18, 2016 But there are 4 power supplies, 5 counting the bias. What you want is a series of detectors that detect + 15 volts +/-.25 volts, -15 volts +/-.25 volts, +400 or +450 +/-10 volts, and -400 or -450 +/-10V that all requires an extra board with comparators, voltage references and a number of other parts. Quote Link to comment Share on other sites More sharing options...
yuk228 Posted August 18, 2016 Report Share Posted August 18, 2016 3 minutes ago, kevin gilmore said: But there are 4 power supplies, 5 counting the bias. What you want is a series of detectors that detect + 15 volts +/-.25 volts, -15 volts +/-.25 volts, +400 or +450 +/-10 volts, and -400 or -450 +/-10V that all requires an extra board with comparators, voltage references and a number of other parts. My original plan was to indicate R+, R-, L+, L- on the amp board instead of the power. As the LED on amp boards drive the current, so I just change to simply indicate power on/off only by using GRLV voltage output. Quote Link to comment Share on other sites More sharing options...
GeorgeP Posted August 18, 2016 Report Share Posted August 18, 2016 But all that tells you is there are some volts going through the two LEDs for 2 out of the 4 power supplies. It just sounds like make-work for no purpose - like this: 1 Quote Link to comment Share on other sites More sharing options...
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