its only about half there in any one of those, none have more than 2 channelsfinal format will have 4 or 6 channels. I have 4 built up, thinking of adding one of Acko's es9016 boards for sub/bass
Holy mackerel Batman
What isolator are you using?
More things to fit in the case
Ian's isolator board may fit but need some modification, it also includes isolation for other control signals.
Holy mackerel Batman
i'm not trying to fit it all in that case =) and till Ian comes up with a multichannel fifo that wont be in there either, nor will the amanero since its 2 channel only. Titan is my only option for multichannel PCM input, luckily its a good option.
so just another dac/dac psu/NTD1 IV, plus the 9016, but that will either use a good quality opamp IV or some transformers so as not to add too much extra electronics. but also some control systems, since you cant connect more than 2 individual dacs without adding some sort of control system, because the dac only has 2 addresses, 0 and 1 for volume control and all other settings.
then there is the 6 poweramps =) initially it will 'just' be the 4 channels of dac and 4 (mono Balanced) channels of poweramp.
so using a more suitable case with enough heatsink on the side wall so its not taking up room in the case.
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I know it never ends
I started just building a set of speakers for the son but now I'm in deep.
indeed, i'm mostly done with the electronics for the amps too, cvasework is where i'm a bit stalled because I dont have much of a metal workshop/tools, or the skills needed to finish the cases to the quality that matches the electronics and because its not a normal dac and not a normal set of poweramps; so the cases will be pretty epic
I have an aleph JX (with semisouth R100), A power jfet circlotron, parts including the unobtainium jfets for an F6, 4 channels of 'the wire' lateral fet poweramps including 2 with the DPS600 fully regulated high current switchmode supplies, a pair of 'the wire' LPUHP and a pair of DX400 Class D on the way. the idea of turning the alephjx into a set of babelfish J's wont go away either...
all of this is done, some fully tested and ready, but at a minimum all parts collected and all soldering and preliminary testing done.
just waiting for cases and finished speakers (drivers bought and cabinets organized). the only purchasing I havent done yet is for the subs, I kinda want to see how I go with the 2 ways before I see whats needed.
I was planning to grab some Accoustic Elegance Lambda td12h or dipole12, but have been recommended several times to check out the Aussie made pro drivers by Lorantz, so things are a bit up in the air there, the Lorantz appeal not just because of the reputation they are gaining, but because it avoids international shipping costs for a pretty massive box...
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If I could influence you - Babelfish J2 with SiCarbide transistors are the best amps I have ever heard. The more I am listening to them, the more I am in awe. I just cannot believe that they sound as good. So if you are still undecided... I would give it a try. From the first moment when I heard them during test listening at Nelsons house, up to today, I am still to find anything that is even remotely as good.
yeah AR2 its you that is tipping me that way already =) I wont be finishing the AJX and therefor trying the babelfish J2 until I get some more heatsinks. i'm building a 4/6 channel or rather more likely 2 x 3 channel 'mono blocks' to house 'the wire' lateral fet AB amp and LPUHP first because i'm further down that track, but the Pass stuff will be trialed driving the mids and will need more heatsinks....I would also prefer to replace the Antek transformers I have.
so that stuff along with the F6 will be the second round trials, but I want to have a set of fully functional amps already before I start down that road.
I worry about getting more semisouth though. i've got 4 x matched R100 and 4 x matched R125, but thats not enough... i'm a little afraid of what I will have to pay for more now.
so that stuff along with the F6 will be the second round trials, but I want to have a set of fully functional amps already before I start down that road.
I worry about getting more semisouth though. i've got 4 x matched R100 and 4 x matched R125, but thats not enough... i'm a little afraid of what I will have to pay for more now.
@AR2: your turn to be the evil 'temptress'
Ohhh, don't you hate that feel of thinking and tempting about...
You are correct. That is one of the worst news I heard, that they are not going to produce any more of those power JFets.
yeah indeed, no more. I have enough to play with a single Aleph J using the R100 and enough R125 for the F6, but the babelfish presents a problem. i'm sure i'll be able to find some somewhere if I keep my ear to the ground, but $$$.
now of course if there is a new papafet/sit or papa-sanctioned jfet, everything will be ok. the patents and much of the semisouth equipment was retained by MIT and solar is not going away, just the industry and capital investment got ahead of itself, so there is still some hope, but its all up in the air. I have lots of matched lovoltech jfets, but so hard to get the heat out of those little suckers.
luckily time is something I have and i'm not stuck for options.
anyway this is OT, if I find some more fets i'll make sure to drop you a line about the babelfish
No much progress in the last couple of weeks, received the 4700 regulator from Ian, soldered two but one failed. Ordered the regulator again from TI today and will try again.
I ordered a 9 output toroidal transformer, looks very good quality.
received the Potato 74 and will follown HiFiduino to modify the Amanero. Will order more to try the sync mod with BIII Master Clock.
I ordered a 9 output toroidal transformer, looks very good quality.
received the Potato 74 and will follown HiFiduino to modify the Amanero. Will order more to try the sync mod with BIII Master Clock.
Attachments
Btw, dear bigpandahk, I probably shouldn't be doing this to you, since you appear to have your hands full with the power supplies, but I have been experimenting with the Arduino Due as a controller and am pretty happy with the results.. The operation is now much snappier. Take a look at this comparison video that I made:
Arduino MEGA vs. Due - YouTube
You may notice that the startup is pretty much instantaneous (ok, no one cares, but still..), the volume control is extremely fast and the input changes are close to instantaneous as well. I'll be sticking with the Due for my implementation. I only have to find out why the rotary encoder is no longer working (it probably has something to do with the way the Due handles interrupts.. I'll look into it).
Arduino MEGA vs. Due - YouTube
You may notice that the startup is pretty much instantaneous (ok, no one cares, but still..), the volume control is extremely fast and the input changes are close to instantaneous as well. I'll be sticking with the Due for my implementation. I only have to find out why the rotary encoder is no longer working (it probably has something to do with the way the Due handles interrupts.. I'll look into it).
One failed
Ian
I follow the video but my shaky hand can put the LDO on the right place. I have to resolder it three time and finally damaged the PCB, may be the LDO as well.
Thanks Dimdim, the Due is really fast. The price is almost triple of the Mega2560. I also can't find any information on the interrupt pin in the DUE forum. Please kind me update of your progress. THis is another must upgrade of my project.
I follow the video but my shaky hand can put the LDO on the right place. I have to resolder it three time and finally damaged the PCB, may be the LDO as well.
bigpandahk,
I suggest you try a BGA re-work station. I believe it works for you, not only BGA but also QFN
.Ian
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