Ok, no problem.
I'm going to take the bottom layer (from the shiny metal website) and put some labels on it.
(I want to make sure that I put the correct part in its place.)
I'm going to take the bottom layer (from the shiny metal website) and put some labels on it.
(I want to make sure that I put the correct part in its place.)
Silly me, I forgot I made that image a while ago.
Hmm, kinda stuck here...
I laid U3 down over a bit too far left (and soldered that side down.)
I need some suggestions on removing it... I tried using my desoldering braid but no luck with that yet.
I laid U3 down over a bit too far left (and soldered that side down.)
I need some suggestions on removing it... I tried using my desoldering braid but no luck with that yet.
Is there a mistake in ezdual bom?
R3,R5 value is 240R
R4,R6 value is 1.1K
With this value on output I have 6.9V.
A value of R3 and R5 should be 100R to get 15V on output.
R3,R5 value is 240R
R4,R6 value is 1.1K
With this value on output I have 6.9V.
A value of R3 and R5 should be 100R to get 15V on output.
It's not wrong per se, but it is lower on the "standard" than the "fancy". I made those BOMs so long ago, that I honestly can't remember if there was a good reason. At any rate, I always used the values from the "fancy" BOM, so I hadn't noticed it, I guess. Sorry about that.
Difficult parts ?
Hi
I am trying to make an order for the parts using the fancy BOM. It seems that some of them are rather "special"or have rare values...
I would prefer to order from as few as possible sources in order to keep the shipping/handling cost down. I would rather pay for the components than the shipping 😉
I am curious to know what properties/specifications to look for if I am trying to find a substitute for a part.
Right now I am looking for resistors:
There's a bunch of resistors listed with Mouser as supplier. But They will charge 20 euro for shipping unless I place an order of minimum 75 euro.
So my question is: If I should look for replacements at say Digikey - what should I be looking for ? Is it tolerance, temperature stability, excact values or ???
I hope someone can give me a clue to find the right solution 😉
Best regards
Knud
Hi
I am trying to make an order for the parts using the fancy BOM. It seems that some of them are rather "special"or have rare values...
I would prefer to order from as few as possible sources in order to keep the shipping/handling cost down. I would rather pay for the components than the shipping 😉
I am curious to know what properties/specifications to look for if I am trying to find a substitute for a part.
Right now I am looking for resistors:
There's a bunch of resistors listed with Mouser as supplier. But They will charge 20 euro for shipping unless I place an order of minimum 75 euro.
So my question is: If I should look for replacements at say Digikey - what should I be looking for ? Is it tolerance, temperature stability, excact values or ???
I hope someone can give me a clue to find the right solution 😉
Best regards
Knud
Hi Knud,
There's some extra data in my 'fancy' BOM, like tolerances, packages and so on, and some Farnell and Digi-key codes. Should get you going!
Regards,
Ray
There's some extra data in my 'fancy' BOM, like tolerances, packages and so on, and some Farnell and Digi-key codes. Should get you going!
Regards,
Ray
Hi all builders.
Firts many thanks to HaLo6 he knows why. 😉
I'm encountering some troubles, some parts are referenced as 1206 while a 0805 footprint is required...
Could someone tell me if 125mW is Ok for R22/19/21 values or 250mW is required for all.
It will be very helpfull to me... 😀
Firts many thanks to HaLo6 he knows why. 😉
I'm encountering some troubles, some parts are referenced as 1206 while a 0805 footprint is required...
Could someone tell me if 125mW is Ok for R22/19/21 values or 250mW is required for all.
It will be very helpfull to me... 😀
Need help
Hi, I could use some help with finishing up my ezdac. I got a few more smt components to mount (I'll provide them). If anyone is interested let me know, and we'll negotiate the details.
http://picasaweb.google.ca/lh/photo/4EKMc_d21THyTl_YLxh-OQ?feat=directlink
Hi, I could use some help with finishing up my ezdac. I got a few more smt components to mount (I'll provide them). If anyone is interested let me know, and we'll negotiate the details.
http://picasaweb.google.ca/lh/photo/4EKMc_d21THyTl_YLxh-OQ?feat=directlink
Last edited:
That's going to be a bit more tricky job, with all the other stuff already mounted. You should have mounted them first thing...
I can do it for you, but then you'll have to ship it to The Netherlands. Can test it too for you if you like 🙂
Regards,
Ray
I can do it for you, but then you'll have to ship it to The Netherlands. Can test it too for you if you like 🙂
Regards,
Ray
New revised ezDAC
Hi all,
Still very happy with my ezDAC, but I think my current DAC deserves better voltage regulators than the on-board LM317's, so I decided to rebuild it. I found the 'Super Teddy Reg' on Acoustica.org, and it looks like the perfect candidate to me. I bought some PCB's at Teddy Pardo, who is the father of this reg, and found a nice big case at Hifi2000 in Italy. I used the Galaxy Maggiorato of 330x230x80mm. They even carry 10mm massive aluminium fronts!
I designed some new PSU boards to accommodate the rectifier diodes, big caps and pre-regulator. I use a total of four STR's (Super Teddy Regs...), one for each supply voltage. Also, I made a small PCB with three HF relais for digital input selection (YES! Finally I can hook up more stuff to my DAC!). I use BNC's now for the digital inputs. The relais are driven by a switch on the front.
Here's the progress so far:
Hi all,
Still very happy with my ezDAC, but I think my current DAC deserves better voltage regulators than the on-board LM317's, so I decided to rebuild it. I found the 'Super Teddy Reg' on Acoustica.org, and it looks like the perfect candidate to me. I bought some PCB's at Teddy Pardo, who is the father of this reg, and found a nice big case at Hifi2000 in Italy. I used the Galaxy Maggiorato of 330x230x80mm. They even carry 10mm massive aluminium fronts!
I designed some new PSU boards to accommodate the rectifier diodes, big caps and pre-regulator. I use a total of four STR's (Super Teddy Regs...), one for each supply voltage. Also, I made a small PCB with three HF relais for digital input selection (YES! Finally I can hook up more stuff to my DAC!). I use BNC's now for the digital inputs. The relais are driven by a switch on the front.
Here's the progress so far:
Attachments
I'm about to start building my board, and have an SMT rework station at my work. If you're desperate I could give it a shot, or ask one of the specialists at work to help me.
Is there a C40 on the bottom of the ezdac? It doesn't seem to be on the standard bom.
Can someone let me know what it is?
Thanks,
JG
Can someone let me know what it is?
Thanks,
JG
NEW EZ DAC by Ray ???
Ray,
You have perked my curiosity!!
Would you care to expand on the "levels" of digital inputs you are integrating to the "super" ezDAC?
I happen to be planning my build of the ezDac (boards on order), but with a strong inclination to mod the input side for USB (iMAC source) as well as S/PDIF.
So far I have looked at integrating a converter such as:
1. Hageman's USB-S/PDIF module which is a plug-play electrified by the computer's USB supply.... or
2. RAKK USB terminating into a LL1572 pulse transformer and connecting to the ezDAC's S/PDIF input w/o a second Tx. This USB device input is actually used in the RAKK dac Mk II's CS8416 receiver.
I am at the bottom end of the learning curve here
and would be very appreciative of any guiding suggestions/recommendations from you and board contributors having looked at other input types.
Thank you,
Ray,
You have perked my curiosity!!
Would you care to expand on the "levels" of digital inputs you are integrating to the "super" ezDAC?
I happen to be planning my build of the ezDac (boards on order), but with a strong inclination to mod the input side for USB (iMAC source) as well as S/PDIF.
So far I have looked at integrating a converter such as:
1. Hageman's USB-S/PDIF module which is a plug-play electrified by the computer's USB supply.... or
2. RAKK USB terminating into a LL1572 pulse transformer and connecting to the ezDAC's S/PDIF input w/o a second Tx. This USB device input is actually used in the RAKK dac Mk II's CS8416 receiver.
I am at the bottom end of the learning curve here
and would be very appreciative of any guiding suggestions/recommendations from you and board contributors having looked at other input types.Thank you,
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