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Post by Deleted on Nov 28, 2012 17:20:05 GMT
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Post by Deleted on Nov 28, 2012 20:00:20 GMT
I've just received my Amanero with the U2 LDO removed and the hot rod Salas BiB, all I can say is WOW!! I'll try to take some pics tomorrow. So the general consensus is that power supplies matter every bit as much for digital areas, as they do for Analogue ? Perhaps even more so ?
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Post by Deleted on Nov 28, 2012 20:16:45 GMT
So the general consensus is that power supplies matter every bit as much for digital areas, as they do for Analogue ? Perhaps even more so ? . Dave.
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Post by Deleted on Nov 28, 2012 20:19:42 GMT
It certainly powers the critical XOs's with much lower noise, as to other "digital areas".... I won't comment, there are already plenty of threads discussing that topic.
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Post by Deleted on Nov 28, 2012 20:36:02 GMT
It certainly powers the critical XOs's with much lower noise, as to other "digital areas".... I won't comment, there are already plenty of threads discussing that topic. Sorry Javier. Couldn't resist. I am pleased to see you getting such great results.
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jkeny
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Post by jkeny on Nov 28, 2012 20:55:44 GMT
It certainly powers the critical XOs's with much lower noise, as to other "digital areas".... I won't comment, there are already plenty of threads discussing that topic. This might interest you then? This is from a post by John Westlake DAC designer of 25 years, discussing his current mDac www.pinkfishmedia.net/forum/showthread.php?p=1823378#post1823378 Remember he is talking about his OWN DAC, not the competition. It's refreshingly honest. And BTW, he uses blind testing in his evaluations
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Post by Deleted on Nov 28, 2012 21:14:12 GMT
I was talking about the Amanero board, not the DAC, there is no digital to analogue going on in there though I have the ES9023 running in sync mode slaved to the Amanero's XOs and grounds are connected. My PK DAC has its own PS (Will's reg + JLH).
I also did a PK mod that could be contribuiting to the better SQ, I replaced the original 1uF cap at C10 with on of the manufacturer recommended 10uF value plus a 120K Ohm resistor in parallel. Another change I would have liked to try was replacing current R14's 4k7 Ohm with the recommended 100K adding a 2.2uF decoupling cap from track to GND but didn't have a suitable SMD resistor nor the cap.
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Post by Deleted on Nov 28, 2012 21:16:24 GMT
Hi John Imagine Frans's reaction to that statement! ;D I have always maintained that we can hear things at much lower levels than presently accepted dogma would have you believe. Alex
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Post by Deleted on Nov 28, 2012 22:28:54 GMT
I've just received my Amanero with the U2 LDO removed and the hot rod Salas BiB, all I can say is WOW!! I'll try to take some pics tomorrow. Hi Javier now your cooking with gas. great to hear that you like it but IMHO there is more going on than just a better XO supply. it's undoubtedly part of the story but not the whole picture. it could be that the Salas is coping better with what the XO is feeding back into the supply. those little chokes are OK but i noticed the jump in SQ when i put a dedicated supply on the clocks and i think that Chris did also. from my experience most things benefit from decent power chips clocks whatever. just a thought but you could whip those chokes out and power the clocks direct then you would know for certain. great stuff though your news has made my day. take care
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Post by Deleted on Nov 28, 2012 22:43:47 GMT
Thanks Shaun. I wish I could try all that!!!! I'm saving every penny I can just in case a couple of things suddenly become available from Italy... BTW, are you still on original drivers and firmware? Did you see the PM I sent you yesterday?
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Post by Deleted on Nov 28, 2012 23:33:02 GMT
Thanks Shaun. I wish I could try all that!!!! I'm saving every penny I can just in case a couple of things suddenly become available from Italy... BTW, are you still on original drivers and firmware? Did you see the PM I sent you yesterday? Yup waiting with baited breath for the Italian connection to come up with something cool. still using the original firmware that came with the board but have the latest drivers. i keep meaning to update the firmware but time is a little tight here ATM. i may do that now take care
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Post by Deleted on Nov 29, 2012 1:04:24 GMT
Hi Javier after a little head scratching i now have the latest firmware flashed and the latest drivers. is it me or do they sound a little better? DSD ready ish take care
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Post by kp93300 on Dec 2, 2012 3:15:05 GMT
Hi all l am late for the power supply mod and need some help in the pin out of the usb receptable. The picture is on the undersurface of the board. The red dot is the +5V dc in ? The black dot is the ground? Which is the D+ and D-? Are my pin assignments correct? thanks
kp93300
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Post by Deleted on Dec 2, 2012 12:05:02 GMT
Hello and welcome. Firstly you should not be attempting any changes without the Amanero circuit diagram! It will tell you this and much more. Available from this page. In the meantime;
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Post by Deleted on Dec 2, 2012 12:14:38 GMT
Hi all l am late for the power supply mod and need some help in the pin out of the usb receptable. The picture is on the undersurface of the board. The red dot is the +5V dc in ? The black dot is the ground? Which is the D+ and D-? Are my pin assignments correct? thanks kp93300 Hi kp3300 and welcome to RG Both myself, Chris and Javier have had some success with powering the Amanero board from a dedicated supplies. my advice would be that if you would like to try a good quality PSU in a non destructive way then one of Alex's JLH USB power injectors is a good choice. this would just plug in with no modifications to the board what so ever. rockgrotto.proboards.com/index.cgi?board=talk&action=display&thread=7327it's a really good supply and i found that it lifted the Amanero to a new level. i have a spare JLH board if that would help. i later found that removing the 3V3 LDO on the Amanero board and supplying 3V3 directly lifted the SQ still further but as a first step I'd recommend the JLH. I'm unsure of the pin assignments that you have posted so maybe someone could come in on that. welcome aboard take care
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Post by kp93300 on Dec 3, 2012 2:29:53 GMT
Thanks CJ and shuan, Let me digest the thread link posted by you and decide about your offer of the JLH board. Yesterday, I build a linear reg based on using the 3 pin regulator part 4 of this blog www.acoustica.org.uk/My trans output 16 V dc and in order to prevent LM 317 overheading, i drop the 16V dc to 10 V dc by a cap multiplier based on TIP 122 darlington. The 3 pin reg output is 4.7 v dc and drop to about 4.55 v on load with the amanero board. I power it up yesterday by hooking it directly to the pin 1 on the underside of the type b usb receptable. It works with much improved sound esp in bass and very fine ambient retrieval of acoustic clues. regards kp93300
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Post by Deleted on Dec 3, 2012 13:43:31 GMT
Hi KP Yes myself,Javier and Chris have found that the sound quality improved quite noticeable when we powered the Almanero with a good PSU. seems like a few others over on DIYA are starting to notice the benefits of using a good PSU to power the Amanero also. that pre tracking reg looks interesting but have you tried the teddy or super teddy regs yet? I've used teddy regs before and found them to be pretty good. Board offer is open should you wish to try just drop me a PM. Thanks for keeping us posted on your progress. good work take care
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Post by kp93300 on Dec 4, 2012 1:32:15 GMT
hi shaun, I tried a super teddy reg build on a breadboard. I didnot like it ---- maybe poor or wrong wiring? Too lazy to troubleshoot. lm317 with pretracking reg is easy to do and very few parts and sound much better . I use a zener to regulate the output V , a snubber value of 0.47r and 47 uf at the out put as per carlos in the regulated gainclone power supply.
cheers kp93300
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Post by kp93300 on Dec 4, 2012 1:36:45 GMT
My mind has been thinking of diying a usb cable for the past few days. any suggestions of a suitable cable ? twisted CAT cable for D- , D+ ? maybe 20 Gauge for ground wire.? Looking for a source of type a and B usb plug. kp93300
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Post by Deleted on Dec 4, 2012 17:55:56 GMT
My mind has been thinking of diying a usb cable for the past few days. any suggestions of a suitable cable ? twisted CAT cable for D- , D+ ? maybe 20 Gauge for ground wire.? Looking for a source of type a and B usb plug. kp93300 Hi kp93300 first name? would be nice as your handle is a bit impersonal a few of us had been thinking along the same lines but we ended up going for a mini GB of Furutec Formula 2. a nice sounding cable IMHO. it has an interesting construction method which i think may have something to do with the resulting SQ. OK no copying of this cable pleeeeeas from the center twisted DATA lines with their own foil screen and drain wire to connect to the outer screen. then I'm not sure if the VBUS and Ground wires are twisted but my hunch is that they are not but they are a little thicker (like me ;D) than the DATA lines. then an overall foil screen and braid finally outer jackets 2 of so the cables are very tightly bound together. I'm not sure how much of the performance is construction method and how much exotic copper but it could be interesting to find out. USB2 plugs can be had on eBay pretty cheaply but make sure that they are USB2. seems like the consensus here is to keep those USB cables as short as possible. ''I tried a super teddy reg build on a breadboard. I did not like it ---- maybe poor or wrong wiring?'' yup i thought that the Teddyreg i built was OK but better supplying high current stuff. Hi Javier that build is coming along nicely take care
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Post by Deleted on Dec 8, 2012 0:27:24 GMT
I was reterminating some USB cables today and thought the following may be handy to some.
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Post by themystical on Dec 10, 2012 18:06:23 GMT
Hi Guys I installed the board into my DAC and upon powering it up was having a problem in it not being recognised by Windows. Upon investigation, the 3.3V pin on the board was measuring 0.2V. Clearly something was not right with the power supplies on the board so I decided to remove the U2 regulator suspecting this had blown ( and wanting to power the board at 3.3V at some stage anyway). I now measure 1.1 Ohms between the 3.3V terminal and Ground which doesn't seem right either as by simple Ohms Law, this means it would draw around 3A? Can somebody who has a correctly functioning board measure the Ohmic resistance between the 3.3V terminal and Ground to see what this is and whether I still have power supply problems with my board? I can't just power it up as I have yet to build the 3.3V supply. Recommendations on the format/type to use are also welcome. Regards Avinash
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Post by Deleted on Dec 10, 2012 19:56:38 GMT
Just in case can I point you back to here.
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Post by themystical on Dec 10, 2012 21:40:48 GMT
Just in case can I point you back to here. Ok thanks for your help. I think I have determined that there is still a problem with the board so have ordered another one.
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XTRProf
Fully Modded
Pssst ! Got any spare capacitors ?
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Post by XTRProf on Dec 11, 2012 2:26:47 GMT
Hi Guys I installed the board into my DAC and upon powering it up was having a problem in it not being recognised by Windows. Upon investigation, the 3.3V pin on the board was measuring 0.2V. Clearly something was not right with the power supplies on the board so I decided to remove the U2 regulator suspecting this had blown ( and wanting to power the board at 3.3V at some stage anyway). I now measure 1.1 Ohms between the 3.3V terminal and Ground which doesn't seem right either as by simple Ohms Law, this means it would draw around 3A? Can somebody who has a correctly functioning board measure the Ohmic resistance between the 3.3V terminal and Ground to see what this is and whether I still have power supply problems with my board? I can't just power it up as I have yet to build the 3.3V supply. Recommendations on the format/type to use are also welcome. Regards Avinash Sorry, have you tested the Amanero just by using USB 5V power just by plugging it into the PC after installing the Amanero driver? PC should recognise it straight away and install the correct USB driver. No fancy super power yet. Test recognition by PC first. I have not read the whole thread so I'm not sure whether you have tested PC recognition first. Btw, you should be measuring impedance and not resistance. So your static measurment at 1.1 ohms means nothing in the dynamic work.
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