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Post by Deleted on Dec 14, 2012 22:01:21 GMT
Forgot to ask Allan, how do you take these excellent pictures? I must have had about 50 attempts, I kid you not, with my cheapie automatic and my best result is no where as clear as yours. Do you use a tripod with quite a long exposure? Hi Avinash Had a quick look at the Amanero Data sheet and it clearly shows no connection between the Via you've pointed out and the ground track next to it. here is a link to the Data sheet just in case you don't have it already. www.amanero.com/drivers/combo384-D.pdfalso some schematics on the left hand side of this. amanero.com/just a thought but with the large number of boards now sold it may be the case that you where unlucky enough to get the faulty one. Just out of interest what's that via measuring to ground? good luck take care
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Post by themystical on Dec 15, 2012 16:42:24 GMT
Hi Avinash Had a quick look at the Amanero Data sheet and it clearly shows no connection between the Via you've pointed out and the ground track next to it. here is a link to the Data sheet just in case you don't have it already. www.amanero.com/drivers/combo384-D.pdfalso some schematics on the left hand side of this. amanero.com/just a thought but with the large number of boards now sold it may be the case that you where unlucky enough to get the faulty one. Just out of interest what's that via measuring to ground? good luck take care Shaun Measured between the Via and the components the track connects to and realised that the track is actually 3.3V. It measured at 3 Ohms. Figured out how take photo's of Allan's calbre (well nearly)....sunshine is key! My Board -1 by themystical2012, on Flickr Zoomed it up. Detail by themystical2012, on Flickr My intiution now is that there isn't a short circuit there. I have realised now that it is going to be impossible for me to solder this 100 leg monster so I probably need to find somebody who can do this for me. Next step is to research companies/people who might be able to tackle this. Anybody know of companies/people in the Northwest/UK who might be able to have a go?
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Post by Deleted on Dec 15, 2012 18:48:29 GMT
Tirna Electronics near Edinburgh might be able to help - ask for Dr. Jimmy Dripps, owner - very nice guy to deal with: - www.tirnaelectronics.co.uk/Hope this helps, Dave.
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Post by themystical on Dec 15, 2012 20:18:46 GMT
Tirna Electronics near Edinburgh might be able to help - ask for Dr. Jimmy Dripps, owner - very nice guy to deal with: - www.tirnaelectronics.co.uk/Hope this helps, Dave. Thanks Dave..will give them a call when the replacement chips arrive.
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Post by Deleted on Jan 11, 2013 21:25:00 GMT
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Post by Deleted on Jan 11, 2013 23:00:26 GMT
Hi Javier well spotted I've just stumbled into that thread myself and put my name on the list. looks interesting. take care
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XTRProf
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Post by XTRProf on Jan 11, 2013 23:20:36 GMT
Interesting. Sorry, is this Teflon pcb. Use after the Amanero? Let's see what Amanero comes out with before committing as that will be specifically designed for his USB board.
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Post by Deleted on Jan 11, 2013 23:49:35 GMT
I've been trying to figure out the circuit and I there seem to be no pads to place XOs on that PCB so unless I'm missing or miss reading something it looks like it uses the MCLK from DAC's onboard XO (input on MCK uFL connector) to reclock the DATA, BCLK and WCLK/LRSCK incoming from the Combo384 so it would be of use only to those using async mode. What do you reckon? In fact, if you check the other reclocker he is planning, a higher end one for his expensive AKX701 Turbo Clock board and AKD12P ES9012 based DAC, is designed to enslave both the Amanero board and the DAC to the 701 having a single top of the line XO driving the whole system. (post #633 at www.diyaudio.com/forums/digital-line-level/147817-ackodac-based-es9018-64.html#post3301635) I'll wait untill this is cleared a little. @chong, the 25$ PCB is not Teflon, that is left for the 150$ one.
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Post by Deleted on Jan 12, 2013 0:09:00 GMT
Just as I thought.... Acko has just posted this 10min after my previous post:
-"1. Parts are available form Digikey or Mouser. I am keeping track and cross-checking as I go along. Will give a cost estimate on parts shortly. There are a few 0603 parts and not too small smd ICs to solder, so standard tools will do.
2. I did mention ESS DACs only mainly because of the way the re-clock MCK on the board is derived. At 834KHz the Amanero bit clock (BCK) goes up to max 24.756MHz. To re-clock this successfully requires re-clock frequencies much higher. I have mentioned this in my R&D thread and also GLT has nailed this very nicely: Synchronous Reclocking? H i F i D U I N O
So I have put is at ~50MHz which is the upper limit of a 9023 DAC. The 9012/16/18 can take even higher at up to 100MHz to do it even better. I am not sure if other DACs can handle this level, so the reason for excluding them. There is not need get synchronous types like 49.576MHz or 98.304MHz as this is an Async re-clocking design.
The Amanero MCK is discarded (as it has to go through the isolators anyway). ESS DACs on their own clocks for Async mode Other DACs may require sync MCK from transport
The DSD Active signal from Amanero is also discarded as the ESS DACs can auto-detect source formats.
More to come ..."-
I think I'll skip this one and wait to see what Domenico has to offer.
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Post by Deleted on Jan 17, 2013 11:02:45 GMT
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Post by pet240 on Jan 23, 2013 14:45:17 GMT
G'day All,
Long read but most interesting, am on GB4 for the amanero but have a WaveIO currently, am actually curious as I have the FIFO for the BIII but it doesn't do DSD. I am looking to record vinyl at dsd128 and try to play directly through the buff, rather than dealing with DSD to PCM conversion. Though how to get the DSD through the FIFO is the question!
Love your work fellas,
Drew.
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Post by themystical on Jan 25, 2013 15:28:29 GMT
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Post by Deleted on Jan 25, 2013 23:58:56 GMT
Hi Avinash yes i spotted that one also but I'm in for the Acko unit posted above as I'm more interested in it's re-clocking function. I'm planning to try one between a Teleporter and BIII so the re-clocking will be useful. not tooo sure if it's going to work or not but I'm up for a challenge. i see you've grabbed one so keep us posted on how you get on with it. BTW i tried the Kondo with AN D2 PSU which sounds quite nice but has a little to much gain for what i have now. but it may be just the job later with a 45SE I'm thinking of resurrecting which needs plenty of voltage swing at it's input. take care
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XTRProf
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Pssst ! Got any spare capacitors ?
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Post by XTRProf on Jan 26, 2013 0:34:29 GMT
but it may be just the job later with a 45SE I'm thinking of resurrecting which needs plenty of voltage swing at it's input. Ah, back to super high voltage tubes, if I'm not wrong, after getting tire of SS, eh? Good and on the right path to REAL music illusion again.
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Post by Deleted on Jan 26, 2013 11:42:34 GMT
but it may be just the job later with a 45SE I'm thinking of resurrecting which needs plenty of voltage swing at it's input. Ah, back to super high voltage tubes, if I'm not wrong, after getting tire of SS, eh? Good and on the right path to REAL music illusion again. Hi Chong nope I'm more than happy with what i have at the moment. but it all started when i sorted out my parts err shed and found 10x Hammond mains transformers, 15 chokes of various sizes and H's, hundreds of tubes and caps. yup deep embarrassment that none of it was being used and some pretty half ass-ed excuses to my other half. the AN PSU is a pretty good tube based reg and easy to build so just for fun i knocked one up. it's given me a nice platform to play with different pre topologies in a quick and dirty way. all built on a piece of wood. so fare I've tasted the Kondo, Aikido 6CG7/6N6P and Aikido cathode follower 6N6P and 6N30P. they all have one thing in common. they lack the transparency of Alex's class A HA/PRE. and warmth well the Aikido sounds anything but warm if i get round to building the 45 then I'm going back to the Kondo because it may be a good match. but that's not the only point of building them. just a bit of fun sorry for the OT take care
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Post by themystical on Jan 26, 2013 21:01:28 GMT
Shaun I have never understood this reclocking thing properly. I was under the impression that the Sabre DAC's reclocked anyway so is there something I am missing? Good job on the Kondo M77 preamp...yes the gain is a bit high because he has paralled the tubes. He does have the M7 design which is similar but does not use paralleled tubes if you want to check that out. I also agree that the Aikido was anything but valve like but I stand by my initial comments that the M77 is the most dynamic sounding preamp that I have heard. It would be good to get your impressions of all these and your verdict on the best sound for you. Avinash
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Post by Deleted on Jan 26, 2013 22:47:03 GMT
Shaun I have never understood this reclocking thing properly. I was under the impression that the Sabre DAC's reclocked anyway so is there something I am missing? Good job on the Kondo M77 preamp...yes the gain is a bit high because he has paralled the tubes. He does have the M7 design which is similar but does not use paralleled tubes if you want to check that out. I also agree that the Aikido was anything but valve like but I stand by my initial comments that the M77 is the most dynamic sounding preamp that I have heard. It would be good to get your impressions of all these and your verdict on the best sound for you. Avinash Hi Avinash The M77 does sound VERY tube like and pretty much what i was expecting from AN Japan. nice but it's going to be a little tough to get a handle on it's sound without the right power amp to try it on. the M77 was designed to drive the Ongaku? i think which needs a little beef to get it going. i have some GE NOS 5687 to try the m7 with but i think that a buffer is going to work best for me at the moment until i have the PA sorted. so I'll start a thread based on the AN regulated PSU and start from there. sorry OT again take care
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Post by pet240 on Jan 27, 2013 2:44:34 GMT
Hey,
Read a compare of the Kondo and the VacuumState RTP3D, interesting compare regards dynamics etc, Will try to track a link for you.
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Post by Deleted on Jan 27, 2013 11:54:47 GMT
Shaun I have never understood this reclocking thing properly. I was under the impression that the Sabre DAC's reclocked anyway so is there something I am missing? Good job on the Kondo M77 preamp...yes the gain is a bit high because he has paralled the tubes. He does have the M7 design which is similar but does not use paralleled tubes if you want to check that out. I also agree that the Aikido was anything but valve like but I stand by my initial comments that the M77 is the most dynamic sounding preamp that I have heard. It would be good to get your impressions of all these and your verdict on the best sound for you. Avinash Hi Avinash looks like you are right on the BIII re-clocking arrangements i was just wondering on giving it less to do. but i have a PCM5102 also so the re-clocker may be good for that. Hi Drew the Vacuumstate looks interesting and if i remember rightly uses super regs also so I'll have a look round for that. take care
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Post by themystical on Jan 28, 2013 15:37:28 GMT
The M77 does sound VERY tube like and pretty much what i was expecting from AN Japan. nice Shaun, You obviously didn't experience the wow factor that I did with this preamp...... It will be interesting to read your thread on the PS for the AN. I will tell you why........I have a theory.... Regulators (both shunt but more so linear) are not very effective in pre/power amps particularly valve amps. Yes, they do hold the voltage rock steady but with anode voltages of 150V or so, a volt here or there isn't particularly going to change the valve characteristics. Yes, they are low noise but again with such a high voltage, extreme low noise is of little consequence and the noise aspects are quite easily dealt with by chokes and bypassing capacitors at the valve pins. The most important thing for these valve circuits is having a very low impedance for audio frequencies to deal with the massive swings demanded. This is where the regulators fall down in comparision with the bog standard choke/capacitor arrangement and I believe stint impact and dynamics. If I were you I would try with and without the regulator to see which you preferred. FYI is a link to another guy's impelementation of the power supply. www.dms-audio.com/audio-note-m77-diy-cloneBest Avinash Sorry for the off-topic post. Will wait for the seperate topic before discussing this further.
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Post by Deleted on Jan 29, 2013 1:11:44 GMT
The M77 does sound VERY tube like and pretty much what i was expecting from AN Japan. nice Shaun, You obviously didn't experience the wow factor that I did with this preamp...... It will be interesting to read your thread on the PS for the AN. I will tell you why........I have a theory.... Regulators (both shunt but more so linear) are not very effective in pre/power amps particularly valve amps. Yes, they do hold the voltage rock steady but with anode voltages of 150V or so, a volt here or there isn't particularly going to change the valve characteristics. Yes, they are low noise but again with such a high voltage, extreme low noise is of little consequence and the noise aspects are quite easily dealt with by chokes and bypassing capacitors at the valve pins. The most important thing for these valve circuits is having a very low impedance for audio frequencies to deal with the massive swings demanded. This is where the regulators fall down in comparision with the bog standard choke/capacitor arrangement and I believe stint impact and dynamics. If I were you I would try with and without the regulator to see which you preferred. FYI is a link to another guy's impelementation of the power supply. www.dms-audio.com/audio-note-m77-diy-cloneBest Avinash Sorry for the off-topic post. Will wait for the seperate topic before discussing this further. Hi Avinash maybe i gave the wrong impression. i liked the Kondo and want and nice Tube sound which all of the Aikido's I've tried never seem to manage. I'm aware that regs in this case can tend to flatten the sound out a little so don't worry I'm going back to that. i do get your point about regs and can do a cLCLCRC (with front end tuning cap to set the voltage so as near as can be choke input which i tend to like) quite easily so I'm up for another bash at that. out of interest what are you driving with your Kondo? I'll keep you posted take care
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Post by themystical on Feb 3, 2013 17:26:20 GMT
I take it everybody is up and running with the ASIO driver and the latest firmware? It is very stable for me and resolves some of the previous issues I had intermittently playing 96k/192k files on my Linux based Joggler
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Post by pet240 on Feb 3, 2013 20:04:59 GMT
Haven't got mine yet, GB4, shall ask should already have the latest firmware as released. Good to see it is continuing to be worked upon! Sorting power supplies ATM, who do I talk to about JLH boards etc? I believe Greg Erskine sent me a couple a few years back, just need to find em, a couple newies wouldn't go astray!
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Post by themystical on Feb 3, 2013 20:16:07 GMT
Pet240 See the GB thread in the DIY section for the JLH Ripple Eater Boards. Jon Clancy is running this. Avinash
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Post by Telstar on Feb 6, 2013 16:04:43 GMT
I ordered one of acko boards, but I dont think i'll use it.
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