non-profit ver.3 TDA1541a DAC for limited budget diyers

[tube-lover]

hi agent.5,

can U tell me that which method that U like parallel running in the 1541a chips. pls let me know!!!!

this is the ultimate ver.3 parallel 1541a PCB with chips. power PCB image file.

like our PC parts can plug & play.

If U like to share the same 14 pcs of decoupling caps.
use gold pins to connect will be Ok, if not, U can addition extra 14 pcs on the extra PCB & extra 1541a chips.

thx

thomas

[agent.5]

can U tell me that which method that U like parallel running in the 1541a chips. pls let me know!!!!

.... if not, U can addition extra 14 pcs on the extra PCB & extra 1541a chips.

I like no sharing. 14 decouping caps for each 1541a.

[tube-lover]

hi AGENT.5,


looks if the chips not matching, very close matching. not share the caps will cause some distortion. I was afraid for this.

thx

thomas

[agent.5]

Originally posted by tube-lover
hi AGENT.5,


looks if the chips not matching, very close matching. not share the caps will cause some distortion. I was afraid for this.

thx

thomas

I know. Please take a look. I hope the chips that you are referring to are matching.

[fedde]

Hey this sounds great!

I have been thinking about a TDA1541 project for a long time. I still have a pile of these DAC chippies here (including a S1 variant). Is it possible to get an assembled DAC kit without DAC chip? Probably not as the boards have already been assembled?

Please let me know the possibilities. But don't hesitate to already include me on the list! ;-)

Fedde

[MGH]

Hi Thomas,

Thanks for getting me the TDA1541A. Don't worry - I'm not going to use these extra chips on v. 3 DAC. They are for another parallel DAC project. Please try to get closely matched set of 8 TDA1541A as possible (Please make sure these are not fake 1541A). This is what I will order:

1) v. 3 TDA1541A DAC kit (included CS8414) = $110 + 1.5% paypal = $111.65

2) additional CS8412-IS chip (with adapter & gold pins) = $10

3) additional 8 TDA1541A chips = $10.50 x 8 = $84

4) 14 MKP 0.1uf closely matched caps = $5.50

5) EMS = $7

TOTAL = $218.15


Please CONFIRM that you will try to get the MOST CLOSELY MATCHED set of 8 TDA1541A as possible. Thanks again Thomas.

[Alexandre]

Hello Thomas,

PLS, I would also like to buy 10 matched TDA1541A (same date code), if available.

I wait for your response.

Best regards,
Alexandre

[agent.5]

Thomas,

we get an order of 30 TDA1541A


agent.5 12(I take 8 plus 4 more if noone wants them)
MGH 8
Alexandre 10

[tube-lover]

hi fedde & MGH,


I thought we all were preparing the same project. I also design the full balance 1541a already. But I hadn't funish yet. I did not think this will be products since it need too many chips. too expensive for the product. If U like, when I funish already. I wil post the Power PCB image file of the full balance DAC to diyaudio.com We can continous discuss more!!!!

This can prevent more noise about copy. We share the experience, Ok???Post the power pcb file will not cause more noise about copy copy copy from where where where!!!!!

If any diyers had enough chips on hand & can diy by themselves. I can offer all parts, PCB for them to funish by themselves.

Circuit & PCB file will same time post to forum, not not this several weeks. I need to hand print & running longer time to test the
stable, noise of them.



any comment about the 1 bits??? Not DAC7 but with PWM output stage???

thx

thomas

[MGH]

Hi Thomas,

I did not know about your fully differential DAC. For now, I just want the regular v. 3 as I listed in my previous post. I will order 8 TDA1541A as planned. You will be getting a paypal payment soon. Thanks.