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PhiDAC hex kits with pre-built filters

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#381
Hi Youri,

Here are your TP voltages as reported without filter :

tp1=6.92V
tp2=10.05V
tp3=5.02V
tp4=2.49V
tp5=10.0V
tp6=10.0V
tp7=3.74V
tp8=3.71V
tp9=12.47V
tp10=11.22V

Those all look fine. When you plug in the filter then there is a problem with TP7 (L channel) going up to 12.47V. Please measure TP5 with the filter in (you'll need to probe on the underside of the PCB).
With the filter TP8 seems fine which means if you have I2S going in correctly you'd get sound from the R channel (but not from L as there's a fault with that).
 
#391
Hi again Youri - I have checked out the Whammy schematic. So you only get 11.6V across C9? If so there must be something in error in your Whammy build as C9 is across the output of a 15V regulator. So if its output is only 11.6V that means either its broken or its input voltage is too low (more likely I think). Please check the voltage across C6 and C15 and report back. Thanks!
 
#393
abraxalito said:
Update 8th Feb 2021

Prices for PhiDeca DAC :

Kit with ready-made 7th order filter : 480RMB (~$74)
Kit with ready-made 3rd order filter : 260RMB (~$40)

For existing customers of PhiDAC hex only, Deca baseboard kit : 160RMB (~$25)

Fee for assembling kit and testing DAC : 200RMB (~$31)

Update 6th Jan 2021

PhiDAC hex is in the process of being superceded by Phi DecaDAC - the latter using 10 DAC chips in parallel rather than 6 as in the 'hex'. PhiDeca DAC kits are going to be simpler to build and hopefully will be available from mid-Feb. The vast majority of the SMD passive parts (Rs and Cs) plus SOT-23s will be pre-soldered at the factory. This leaves the builder to solder ICs, a handful of discrete semiconductors and the through-hole parts (caps and connectors).

PhiDeca DAC needs a 15V regulated power supply, max current draw is 160mA. A 500mA rated linear wall-wart is suggested.

<original post>
Orders now are open on PhiDAC hex kits with pre-built filters - feel free to PM me.

Preferred payment method is via Transfer Money Online | Send Money Abroad with TransferWise which typically adds a 2% fee. Our receiving currency is USD or Euro. PayPal may also be used, in USD but will attract higher fees, about 16%.

Kit for PhiDAC hex mainboard with 7th order filter pre-built and tested : 470RMB (~$70)
Kit for PhiDAC hex mainboard with 3rd order filter pre-built and tested : 280RMB (~$42)

Kit for PhiDAC hex with both filters 560RMB (~$84)

Shipping rates are in addition and depend on your location and speed of service. Courier (FedEx, TNT, DHL) typically takes 8 - 10 days and e-packet two to four weeks. Not all locations can be serviced by e-packet though.

I have prepared (mostly the work was done by my wife) a graphic of how to proceed with soldering your PhiDAC hexkit. Its here : lingDAC - cost effective RBCD multibit DAC design

Update 13th April 2021

Here is where you can find a guide to soldering up your Phi DecaDAC kit : PhiDAC hex kits with pre-built filters
Click to expand...
Hi, what I2S S/IPDF input board do you recommend and where can I purchase it? Thanks
 
#396
Hi Richard, As I mentioned, I am buying DebK's PhiDeca DAC and I would like to purchase the following from you. I would like to have fast delivery and I will use Wise for payment to you.
I need:
1) S/PDIF input board, no display needed (This is for the Toslink hookup to my CD player
2) USB input board (I think I need this so I can hook up my phone to this DAC Is that correct?
3) Power supply for DAC
4) Power supply(s) for USB board and S/PDIF board
5) Power supply module ? Is this needed along with the 2 different power supplies? If so, that is fine.
Please send me an invoice when you can.
My zip code is 98391 in Lake Tapps, WA
I will pay right away.
Thanks,
Don Palmer
 
#397
Hi Richard,
On a previous private message, you had said the following:
"1) S/PDIF input board, no display 140rmb
2) Two PSU boards with AC input (need transformer with two isolated windings) 140rmb"

I am unsure what you mean by "(need transformer with two isolated windings)"

I am a little in the dark on these type of items. Do the PSU boards need a separate transformer for the AC that were not supplied or do I plug 120v AC into the AC input? Does the PSU have the transformer built in?

If I do need a transformer with two isolated windings, can you provide me with an example of what would be needed?
Thanks
 
#398
Your PSU boards each need an AC input which is low voltage (typically 15-18VAC). Definitely do not connect them directly to mains, that would be a quick way to electrocute yourself.

An example of the kind of transformer (not the one to actually order) I have in mind is this one : https://www.aliexpress.com/item/32707566410.html

You'll note it has two isolated secondary windings, seeing as they show the offload voltage I'd choose the 2*15V version (the one shown in the link is 18V). There are two primary windings and those need to be wired in parallel for 115V operation.

This particular trafo is a PCB mount one, there are chassis mount versions which will work just as well but I wasn't able to find one on Aliexpress with 115V primary.
 
#399
I would be interested in purchasing the PhiDeca DAC kit, though i don't know what filter would be best for my setup. Perhaps I can get some recommendations. I need good USB input and would like RCA too (not as important though). Most my stuff is Balances so that would optimal. I believe I saw some PS recommendations in the thread, so unless there are any updates or opinions there, i'll use those references.

I'm not sure how much it matters, my system consists of a purifi class D amplifier and some kef bookshelf speakers at the moment. I'm in the process of building some DIY Elsinore floor standing speakers and I'll likely build a set of Orchard audio monoblocks in the future.

I'm not bad at soldering, but as far as understanding electronics, I'm just starting. I'm getting into diy projects like this to learn more about how things work. So as long as your not bothered by some "noob" questions, then let me know your recommendations as to what i should get and how to proceed with purchasing. Thanks!
 
#400
On filters, I'd say go for the 7th order one if you're not short of funds. If you are short of funds then go instead for a Kubelik kit.

I'm not really sure what you mean by 'Balances' so could you explain? Do you mean your amp has a balanced input? The Purifi amp does as far as I'm aware but normally you'll have a preamp between your DAC and the poweramp to give source selection and volume control. Noob questions are more than welcome.

To go ahead with purchasing have a look at the first post of this thread.
 
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