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DIY TDA1541A PCB "D3"
DIY TDA1541A PCB "D3"
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Old 1st December 2020, 10:26 PM   #871
tubo is offline tubo  Philippines
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HI Kevin,

here is a diagram for bisesik's transformer. hope this helps

you can find it here on podt # 430 Output transformers for DACs
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File Type: jpg DSC_mill_max_0520_m3_2-4 coils.jpg (469.2 KB, 367 views)

Last edited by tubo; 1st December 2020 at 10:29 PM.
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Old 2nd December 2020, 04:58 PM   #872
chromenuts is offline chromenuts  United States
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DIY TDA1541A PCB "D3"
Hi Ivan

Thanks for the link...I had seen that information before when I was first researching the passive iv solution.

To be honest, I get a headache trying to understand it.

I like to build these projects but I feel like Im in over my head a lot.

Like they say, a picture is worth a thousand words. That is how I often figure this stuff out.

Regards
Kevin
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Old 13th December 2020, 08:25 AM   #873
bisesik is offline bisesik  Kazakhstan
Output transformers for DACs
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DIY TDA1541A PCB "D3"
Hi guys,
I think that drawings will help Kevin to connect the correct way.

Output transformers for DACs
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Ivan
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Old 23rd December 2020, 07:25 AM   #874
har297 is offline har297  India
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Hi Ryan,

We were trying to procure components for this build, unfortunately, some of the components are not available.
Following are some alternatives that are available. Can you please let us know if these are fine ?

Original BoM -> Alternative
16MU226MD35750 -> ??
MMA02040C5109FB300-> MMA02040E5109BB100
MMA02040C5111FB300-> SMM02040C5101FB300
MMA02040C1001FB300-> CMA02040X1001GB300
MLFA25FTC1K50 -> SMM02040C1501FB300
MMA02040C3001FB300-> MMA02040E3001BB100

Thanks
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Old 23rd December 2020, 01:27 PM   #875
ggetzoff is offline ggetzoff  United States
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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
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Old 23rd December 2020, 08:42 PM   #876
ryanj is offline ryanj  Australia
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Quote:
Originally Posted by har297 View Post
Hi Ryan,

We were trying to procure components for this build, unfortunately, some of the components are not available.
Following are some alternatives that are available. Can you please let us know if these are fine ?

Original BoM -> Alternative
16MU226MD35750 -> ??
MMA02040C5109FB300-> MMA02040E5109BB100
MMA02040C5111FB300-> SMM02040C5101FB300
MMA02040C1001FB300-> CMA02040X1001GB300
MLFA25FTC1K50 -> SMM02040C1501FB300
MMA02040C3001FB300-> MMA02040E3001BB100

Thanks
Hi har297,

Some of those alternatives may be ok, but as Greg mentioned there is no suitable alternative for the 22uF film cap - This is a critical part that is responsible for the depth and dynamics of the sound, especially the accuracy in the bass.

I would suggest getting all your parts from Digikey - they have 350 16MU226MD35750 in stock. Mouser also started stocking these caps but at a slightly higher price in low quantities - they have 90 in stock.
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Old 24th December 2020, 03:12 AM   #877
har297 is offline har297  India
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Thanks Greg and Ryan,

Will search accordingly,
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Old 24th December 2020, 06:07 PM   #878
ggetzoff is offline ggetzoff  United States
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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
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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 24th December 2020, 06:46 PM   #879
Vunce is online now Vunce  United States
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DIY TDA1541A PCB "D3"
Thanks Greg, Im sure the manual will be a valuable asset for assembly and startup.
Merry Christmas
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Old 25th December 2020, 02:41 PM   #880
har297 is offline har297  India
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Location: Bangalore
Thanks Greg,

It will help a lot for this build, especially because of intimidating SMD's !!

Merry Christmas..
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