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DIY TDA1541A PCB "D3"
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Old 25th December 2020, 09:14 PM   #881
ryanj is offline ryanj  Australia
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Merry Christmas All!!

Greg, I've looked over the build guide and I think its just a great effort from you, well done! I think it will help a lot. You can go ahead and post it here.

Cheers everybody!
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Old 26th December 2020, 12:26 PM   #882
pistollero is offline pistollero  Portugal
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DIY TDA1541A PCB "D3"
Quote:
Originally Posted by ggetzoff View Post
To the group,

I just finished writing a build guide for the D3 board and sent it to Ryan for review. Once reviewed I will post it here.

Cheers and Merry Christmas,

Greg
Very nice ideia! Thank you very much.
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Old 27th December 2020, 12:42 AM   #883
aguaazul is offline aguaazul
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DIY TDA1541A PCB "D3"
Quote:
Originally Posted by ggetzoff View Post
Digi-Key and Mouser have have the film caps in stock and you want a film cap here. The Rubycon product is the only one I know of that has the values correct size for the pads. Yes, the shipping will be a lot and the caps are not inexpensive, but look at this way, you are already saving a ton of $$ building a world class dac for low $.

https://www.mouser.com/ProductDetail...lx3g3MQA%3D%3D

Blocked

16MU226MD35750 *Must be BOM cap*
MMA02040C5109FB300 MMA02040E5109BB100 (1/4w, find a .4mW)
MMA02040C5111FB300 SMM02040C5101FB300 (1/4w, find a .4mW)
MMA02040C1001FB300 CMA02040X1001GB300 (yes)
MLFA25FTC1K50 SMM02040C1501FB300 (1/4w, find a .4mW)
MMA02040C3001FB300 MMA02040E3001BB100 (1/4w, find a .4mW)

Mouser has all of the resistors in stock, so just order these resistors from them with the film caps.

Where are you ordering from?

Cheers,

Greg
Hey everyone. Digeykey has a Capacitor kit 1189-4323-KIT with 3 16MU226MD35750
inside plus you get a smattering of other parts to experiment with for a price less than the 3 you need @ $25.08.

I grabbed a few of them for my D3 stock.

Cheers,

Aguaazul
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Old 27th December 2020, 12:46 AM   #884
aguaazul is offline aguaazul
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DIY TDA1541A PCB "D3"
CapMX – Multiple D3’s:

Question for y’all regarding multiple D3’s – Power Supply being Ryan’s CapMX.
For 2 - D3’s, do you run 2 CapMX boards? Or make adjustments for power usage?

If 2 CapMX boards, do you use 1 or 2 power transformers?

I have enough stuff to run 2 CapMX boards & 2 of the F-212Z or 1 Toroid with 24 – 0 – 24 2A, enough to run both.

As far as SQ, what have you found to sound better?

Thanks,

Aguaazul
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Old 27th December 2020, 09:33 PM   #885
ryanj is offline ryanj  Australia
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Hi Aguaazul,

If using one CMx for two D3s you'll need to lower the value of R4 and R5 to about 2R each and put heatsinks on Q1 and Q2. As far as SQ goes im not too sure as I haven't really done extensive listening tests.

Thanks for the tip on the rubycon cap kit.


Quote:
Originally Posted by aguaazul View Post
CapMX Multiple D3s:

Question for yall regarding multiple D3s Power Supply being Ryans CapMX.
For 2 - D3s, do you run 2 CapMX boards? Or make adjustments for power usage?

If 2 CapMX boards, do you use 1 or 2 power transformers?

I have enough stuff to run 2 CapMX boards & 2 of the F-212Z or 1 Toroid with 24 0 24 2A, enough to run both.

As far as SQ, what have you found to sound better?

Thanks,

Aguaazul
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Old 2nd January 2021, 04:36 PM   #886
ggetzoff is offline ggetzoff  United States
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Default d3 build guide

Folks,

Attached is the build guide. In this guide I have endeavored to address all of the troublesome areas of the build. However, I am sure that you will still have questions. Please feel free to make comments and suggestions and I will include those in a future rev.

Enjoy,

Greg

ryanj D3 build guide.pdf
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Old 3rd January 2021, 11:34 PM   #887
sthcoaster is offline sthcoaster  United Kingdom
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DIY TDA1541A PCB "D3"
Love how everyone has a contribution to make to this community!

Thanks Greg.

The section on power regs is especially worth paying attention to. And your general tips and pointers at the beginning.
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Old 4th January 2021, 01:14 AM   #888
har297 is offline har297  India
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Thanks Greg for putting this up, Will help first time builders like me.

Regarding dummy load for testing PS, how can we achieve this ?
Any starting point for Resistor values. Because as per the Guide the Shunts are pretty delicate.

Thanks


Quote:
Originally Posted by ggetzoff View Post
Folks,

Attached is the build guide. In this guide I have endeavored to address all of the troublesome areas of the build. However, I am sure that you will still have questions. Please feel free to make comments and suggestions and I will include those in a future rev.

Enjoy,

Greg

Attachment 907326
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Old 4th January 2021, 02:09 AM   #889
ggetzoff is offline ggetzoff  United States
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On page two of the guide I list R values for each pin.
__________________
Airline Pilot-If it's not Boeing I'm not going.
Aleph J, F4, DCB1, VHEX +, USSA-5, BA-3 Pre, DCG3, USSPA, Transcendent Sound Masterpiece (sold) TDA1541A D3, RH84, D3 Build guide
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Old 4th January 2021, 01:27 PM   #890
markos4553 is offline markos4553  United States
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Good job Greg!!! This will surely help builders.


I will say I have successfully built 5 D'3, 2 I2StoSIM V1, and 2 I2StoSIM V2 with a hakko 888D soldering iron starting with the smallest components and tightest spaces and working to completion in this fashion. So it can be done without a rework station but if your budget allows it will help to have the rework tools. I do have a fair amount of experience soldering with an iron. The key for me is using a pointy tip, very small wire, plenty of flux, and work quickly. I follow up every soldered joint with a jewelers loupe looking for bridging or open joints. Every board has been done without issue and each board has been easier to complete than the one before it.


Thank you again @ggetzoff for the build guide efforts and thank you @ryanj for the excellent DAC, and thank you to the other members here for your help and inputs. This is a remarkable community!


Mark K.
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