jonclancy
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Post by jonclancy on Aug 29, 2011 17:50:56 GMT
OK, here is MondoFlea!!! 50mA Powerhouse!!! One more Flea to do surgery on. I will add the 10uF tant between 7812 output and ground when I do the other board.
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Post by Deleted on Aug 30, 2011 8:10:49 GMT
OK, here is MondoFlea!!! 50mA Powerhouse!!! One more Flea to do surgery on. I will add the 10uF tant between 7812 output and ground when I do the other board. Hi Jon nice work looking forward to blast off take care
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jonclancy
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Post by jonclancy on Aug 30, 2011 12:03:56 GMT
Last bit of Flea surgery completed - measured at 3.31 and 3.38V. Boards lashed together. Bung it on the power. No smoke... Grab PX-100 as stunt cans (no, no, no, no!! ) and start the CDP. Music! Actually, it was a classic FM* moment, as I was surprised by the punchiness of the bass. The PX-100 are pretty good in that respect, but this was something else. I then tried the K701. Sounding good. I would say that the highs seem a little rolled off and the soundstage deep rather than wide, but the detail and timbre was pretty good. So, downstairs and into the main system. Similar presentation - punchy bass, rolled off top (but still there). I used the TX-102 TVC into MyRefC into SD Acoustics OB speakers. Might try the Lightspeed clone later... Overall, a very creditable first run. The wiring needs to change (big time!), and will be twisted and I would like to try the output filters that Leo recommended. I firmly believe that decent power is one of the key elements for getting decent results, and will have a mull over how to do this with Will's next version. A big thanks to Will for designing and producing this great little project, to Jocko for his SPDIF input and Martin for the MondoFlea!! Big bang for your buck here! *F. Me!!
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Post by Deleted on Aug 30, 2011 18:39:07 GMT
Hi Jon, well done you, that's very encouraging I'm riding on Shaun's coat tails on this one and finding the ride very interesting. Looking at USB to I2s via PCM2706/7 but I'm way out of my depth so relying on Shaun to pave the way plus any input from you lads all. I've a woodworking project 50% done then SWMBO has some home related irons in the fire for me but I'll rattle them through for the "Brownie" points then i'ts all cutting boards and SMD......can't wait. Alan
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Will
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Post by Will on Aug 30, 2011 19:11:46 GMT
Good Stuff Jon! and good use of the BBQ chopping board, considering the weather Just remember to keep it under 3000rpm for the first few thousand, and the highs will come on nicely
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Post by Deleted on Aug 30, 2011 19:22:59 GMT
The PCM270x are not the best source for I2S Alan, the Tenor TE7022 based USB->I2S Shaun posted a few pages back won't break the bank and should be much better performance wise while also allowing for higher than 16/48 which is the limit for all 270x chips. There are more USB->I2S available compatible with UAC2 (USB Audio Class 2) and capable of async mode. This guy at DIYAudio sells an interesting one for 70USD+Shipping. www.diyaudio.com/forums/digital-source/185761-open-source-usb-interface-audio-widget-13.html#post2676959
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Post by Deleted on Aug 30, 2011 22:56:03 GMT
Hi Javier, yes I realise that the PCM270 has it's limits. I found this site www.pavouk.org/hw/modulardac/and realised that it was possible to mock up a single sided board USB to I2s using the PCM270 which would give me some hands on to experiment with. Looking at his board layout I'm sure I could cut the boards with my router although I will need to make a jig to get more control of the cutting bit and a bit more practise with the fine detail. Better chips upping the ante to 24/96 and 24/192 would of course be the way ahead but I would require the total schematic laid out on a plate before I could even think about where to go with it. I don't see Shaun's post but found this which looks reasonable. Thanks for your input much appreciated, Alan www.minidsp.com/images/documents/Product%20Brief-%20miniSTREAMER.pdf
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mrarroyo
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Post by mrarroyo on Aug 31, 2011 0:32:56 GMT
Nice work! enjoy it.
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Post by Deleted on Aug 31, 2011 7:31:58 GMT
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Post by Deleted on Aug 31, 2011 10:19:22 GMT
Fun's the name of the game Javier and don't it keep the old brain cells in condition struggling with the unknown plus the kudos you get from achievement. By the way I'm enjoying your Foobar tut' and how much better sounding the Asus card is with the better drivers many thanks for that. Take care, Alan
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Post by Deleted on Aug 31, 2011 12:00:58 GMT
Last bit of Flea surgery completed - measured at 3.31 and 3.38V. Boards lashed together. Bung it on the power. No smoke... Grab PX-100 as stunt cans (no, no, no, no!! ) and start the CDP. Music! Actually, it was a classic FM* moment, as I was surprised by the punchiness of the bass. The PX-100 are pretty good in that respect, but this was something else. I then tried the K701. Sounding good. I would say that the highs seem a little rolled off and the soundstage deep rather than wide, but the detail and timbre was pretty good. So, downstairs and into the main system. Similar presentation - punchy bass, rolled off top (but still there). I used the TX-102 TVC into MyRefC into SD Acoustics OB speakers. Might try the Lightspeed clone later... Overall, a very creditable first run. The wiring needs to change (big time!), and will be twisted and I would like to try the output filters that Leo recommended. I firmly believe that decent power is one of the key elements for getting decent results, and will have a mull over how to do this with Will's next version. A big thanks to Will for designing and producing this great little project, to Jocko for his SPDIF input and Martin for the MondoFlea!! Big bang for your buck here! *F. Me!!Hi Jon nice work indeed and good to see the breadboard being put to it's proper use. how are you working the lightspeed into your MyrefC? take care
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jonclancy
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Post by jonclancy on Aug 31, 2011 12:45:27 GMT
Thanks Guys - I'm delighted this fired up first time... especially given the bodgery on the boards. The LS attenuator is in a separate box, so is a cinch to connect into the system. In fact, I'm off to recalibrate it on the scope right now (dual input from the sig-gen into the scope and match the sines at listening volume setting = perfect balance). With a bit of care, you could build a great little system for well under £200. Cheers Jon
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Post by Deleted on Sept 1, 2011 11:34:45 GMT
Thanks Guys - I'm delighted this fired up first time... especially given the bodgery on the boards. The LS attenuator is in a separate box, so is a cinch to connect into the system. In fact, I'm off to recalibrate it on the scope right now (dual input from the sig-gen into the scope and match the sines at listening volume setting = perfect balance). With a bit of care, you could build a great little system for well under £200. Cheers Jon Hi Jon bodgery on the board? naaa looks good to me and just the way i learned to build tube amps. plenty of room to change things and keep the build fluid. way to go Jon. on the LS i was thinking about impedance matching issues. from what I've read th LS likes to See a relatively high impedance on it's OP (50K+) which is good for tubes but a little tricky for SS. so i was wondering if you'd found any such issues as i was thinking of trying one with my Audiosector. take care
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jonclancy
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Post by jonclancy on Sept 1, 2011 20:18:28 GMT
You are too kind, Sire!! I have recalibrated the LS on the scope and lobbed it on the Sabre. It sounds pretty damned good for a lash-up. There does seem to be some synergy. I'm not surprised that my (more complex) Rogic AYA 1541A DAC has a more rounded presentation, this little DAC is not too far behind. The LS has not complained about being paired up with the MyRefC LM3886 amp. I would have no qualms about trying it on your Audiosector. I think there are many, many people who use a LS with solid state amps. It's such a cheap and easy build, you'd be daft not to try it. If you don't get on with it, you wil be able to get your money back (and more, probably) in the Classifieds on pretty much any audio forum. I'll be doing a bit more listening tomorrow. Cheers Jon
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Post by Deleted on Sept 1, 2011 22:23:06 GMT
You are too kind, Sire!! I have recalibrated the LS on the scope and lobbed it on the Sabre. It sounds pretty damned good for a lash-up. There does seem to be some synergy. I'm not surprised that my (more complex) Rogic AYA 1541A DAC has a more rounded presentation, this little DAC is not too far behind. The LS has not complained about being paired up with the MyRefC LM3886 amp. I would have no qualms about trying it on your Audiosector. I think there are many, many people who use a LS with solid state amps. It's such a cheap and easy build, you'd be daft not to try it. If you don't get on with it, you wil be able to get your money back (and more, probably) in the Classifieds on pretty much any audio forum. I'll be doing a bit more listening tomorrow. Cheers Jon Hi Jon i did hear a LS driving one of Nelson's amps (can't remember which one now) but it was quite a few years ago now. i do remember thinking that the overall sound was pretty good time moved on and i forgot to try one for myself I'm definitely up for having a listen so I'll be doing one in the near future. if i don't get on with it I'll find someone that does and make it for Xmas ;D the Audiosector is outrageously good for the money and destroyed another one of my HIFI prejudices. (chip amps can't possibly sound good) i do try not to pass comment on how things may sound without hearing them first. every time i do something stupid like that the words seem to come back to bite me in the A***. so I've learned something new from Mr Peter Daniels :-/and about what chip amps can do. thanks for the info especially re the AYA which I've note heard but has a mighty reputation. it says quite a bit about Wills DAC to be mentioned in such esteemed company. mmmmmmmmmmmmm now you can take a short rest take care
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leo
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Post by leo on Sept 3, 2011 15:39:57 GMT
You are too kind, Sire!! I have recalibrated the LS on the scope and lobbed it on the Sabre. It sounds pretty damned good for a lash-up. There does seem to be some synergy. I'm not surprised that my (more complex) Rogic AYA 1541A DAC has a more rounded presentation, this little DAC is not too far behind. The LS has not complained about being paired up with the MyRefC LM3886 amp. I would have no qualms about trying it on your Audiosector. I think there are many, many people who use a LS with solid state amps. It's such a cheap and easy build, you'd be daft not to try it. If you don't get on with it, you wil be able to get your money back (and more, probably) in the Classifieds on pretty much any audio forum. I'll be doing a bit more listening tomorrow. Cheers Jon Nice work Jon! I don't think the internal output stage likes heavy loads tbh but is something we can run tests on a little later once more of us have built the updated version, be interesting to see what its capable of. My previous one is currently on loan at the mo. I do remember it being picky regarding regulation unfortunately , just like its much more expensive brother . I tried those super Teddy regs and found the sound quite boring if I'm honest, it sounded a little lazy, A123 batteries or low output impedance regulation was a lot better to my ears, its certainly one area worth experimenting with. These are capable chips, just needs a little work 9022 is excellent especially for the price but don't be too surprised if it doesn't quite compete with your AYA Jon even after a full fettle, she me getting on but still capable of kicking arse I still listen to AYAII a lot
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Post by Deleted on Sept 3, 2011 21:50:49 GMT
Hi Leo yes i remember reading something like that on DIYAUDIO which is why i thought that a buffered OP may help the chip drive more tricky loads. but buffers are a bit like Marmite ;D i guess. so i'll try no to get hypnotized by them Hi Jon are you still finding the top end a little rolled off? and just to cap it off with a really stupid question what cables are you using capacitance wise? take care
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leo
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Post by leo on Sept 3, 2011 22:29:26 GMT
Hi Shaun, I'm sure an output buffer would work well in some setups, beauty with diy is you can try out idea's until it suits your own needs Maybe worth scoping the dacs output into various loads, also before and after the things it plugged into
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Post by Deleted on Sept 3, 2011 22:56:55 GMT
Hi Shaun, I'm sure an output buffer would work well in some setups, beauty with diy is you can try out idea's until it suits your own needs Maybe worth scoping the output into various loads, also before and after the things it plugged into Hi Leo i think you may be dead right that some experimentation could be in order. Also with the PSU side of things but as you say that's the fun part i have 2 Hypnotize boards coming from the latest diyaudio DCB1 GB and a few LVshunt PSU's. so will be up for trying to get that working just to hear what it sounds like. I've not had a listen to the Salas DCB1 but I've used the original Nelson off and on for a few years and think it's pretty good. the large caps used in the original and the PSU arrangements could be improved on which the Salas does (i hope) the buffer may end up being a bad idea but I've not heard one used with this DAC so just throwing it out for discussion. just to get some thoughts on it it may make a good pre though so not all is lost. or my parts box will be the winner take care
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Post by jeffc on Sept 4, 2011 9:25:03 GMT
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Spirit
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Post by Spirit on Sept 4, 2011 9:40:43 GMT
I miss the etching days... that lime green solution looked awesome Do we have an eta on the boards or parts GB? Nice sig Jon My BuffII is still awaiting a usb-i2s converter, and a case... Cheers, Phil
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Post by Deleted on Sept 4, 2011 15:29:43 GMT
Hi Jeff yes I've used the original B1 for a few years so i thought that it might be time to try out the DC version or two. :-/putting a JLH on that also bumped up the SQ. by the way the Hypnotize uses shunt regulators so that should be interesting. you can grab yourself a board for US$15.00 on the GB which you may want to check out. the only thing bothering me slightly is ending up with toooo many DC coupled devices which may be problematic. i may go for a relay switched AC and DC coupled OP for the pre which would allow me to sleep easy. AC coupled my be a bit of a halfway house but it would worry me a bit not to AC couple somewhere along the chain. in the 9023 I've not tried it with a buffered OP but just wanted to mention it as ONE of the available options. ::)and have a bit of a chat about it. on the PSU's well my take is (as per usual) to get things up and running as cheaply as possible. then when the thing works then fiddle with some more expensive options. I'm thinking adjustable regs into Alex's tweaked LV JLH to start the ball rolling. Jeff we do seem to cross paths component wise quite often. are you sure we're not related. ;D ;D ;D ;D take care
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Will
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Post by Will on Sept 4, 2011 21:11:58 GMT
Hi Phil,
I've only just got the gerbers to Shaun, so we are looking at 6-8 weeks, depending on makepcb. Entirely my fault, as I've been sidetracked with moving.
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Post by PinkFloyd on Sept 4, 2011 21:59:26 GMT
Hi Shaun, I'm sure an output buffer would work well in some setups, beauty with diy is you can try out idea's until it suits your own needs Maybe worth scoping the dacs output into various loads, also before and after the things it plugged into Good to see you back Leo
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leo
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Post by leo on Sept 4, 2011 22:05:25 GMT
Ta Still on the Netbook , easier to see than the Android phone screen though
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