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

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#1,303
tube-lover said:
hi ggta,

sorry I need to go out now. My boss was waiting for me. I will first prioty answer U when I back.

many sorry for that!

thx

thomas
Click to expand...

Ok no problem, looking forward for your answer.

I had two more questions:

Is it possible to buy you a tda 1541 chip in addition from the kit?
What are the differences from the previous kit in terms of schematic and component quality?
 
#1,307
Hi ggta,

pls check email.


Hi rtd,

6 source input.

Optical, RCA, BNC, USB, TTL, XLR ( real balance input)

This PCB had output relay circuit into it.

3 seconds after switch on power.

PSU : 5V DC--yes,

control board : No remote.
Use pressure buttom to select source input.


Hi earsandeyes,

yes, simple SE ( use RCA input only) will USD 165 include posatge post to U. Ps added USD 5 to use reg.mail.


Hi kooka,

I resend email to U with answers of your questions. pls check.

Hi SamL,

yes, but post one 30W power transfer oversea postage will increase more. so I did not suggest. but I will try to search , wait a little bt of while!

AD797 was little bit of warm in human voice, OP-42 was increase little bit of detail.

But original chips follow with DAC was Philips 5534. plilips 5534 was the best 5534, better than JRC or ST!

hi Dennis Hui,

sorry too many email, I will one by one answer, sorry for that!
Pls let me know which set up u like, this DAC design will not waste any one. although U upgrade, will not watse any one OLD PCB!

hi ggta,

Is it possible to buy you a tda 1541 chip in addition from the kit?
sure, only one extra 1541 or 1541a chips????

What are the differences from the previous kit in terms of schematic and component quality?
ans, this one was strong improvement of power supply. since 16bits dac most was little weak in base, so I improve speed of the power supply for better dynamic, & stable, because I presume this DAC can 24 hrs turn on. But this design was worse in large size! Old DAC was use 7805 etc, this DAC was use LT1033 etc.


hi flyboi,

nice to meet U again!U will love this DAC, this dac can use IV transformers ( or MC step up 1:10) for IV!

if U like LP, or LP user, had MC step up trans on hand, will one more interest for this DAC.


hi pchw,

pls check email later,sorry for delay.


hi korben69, pls check email.


hi Alan Sebastian,

Alan Sebastian just sent you money with PayPal.

money arrived, I will send to U this several days.

I was double check all sets of dac right not, before osting. I suggest working for every one for several hours again.

thx

thomas



photos show was source input board.

An externally hosted image should be here but it was not working when we last tested it.
 
#1,311
Any LP user in this forum?

If U are LP( MC)cartiage user. Do U had 1:10 MC step up transformers on hand, U can use your MC step Up transformers connect for it, but since 1541a was current output. use normal mc step up transformers will not easy to fit for it because most MC step up cannot running DC. so I still advise use IV transformers.


thx

thomas

take a look for the solder point prepare for transformer IV.

An externally hosted image should be here but it was not working when we last tested it.
 
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