TDA1541A non-o/s DAC PCB

[SPWONG]

Hi, I want one please or may be two if it is in good price.
Thanks.

[Pedja]

Well, my decisions:

No reclocker on the board. The I2S lines will be cut and I will put probably 2 row 10- or 8-pin header footprint there..." but none is supposed to use them actually, everything can still be made with solder (which is normally better as a final solution). I will probably make the additional mounting holes in the board to make easier mounting of the reclocker and the holes will match to those on Elso’s reclocker board. I will also make soon one daughter board with reclocker driven by the can oscillator.

So, CS and TDA will be positioned a bit closer but generally similar as in the previous board and I/V stage will, most generally speaking, take the physical position of the reclocker. This means that the final dimensions of the board will be similar. The previous one was 12.5x12.5cm; if this is important for anyone, its green color is in the reality fresher but my scanner can not capture it.

For the board of such dimensions at this level of interest the price will be about 25EUR, assuming I will not have much troubles and reasons to go again and again with the prototypes.

I have yet to see what will be the analog stage (it won’t change the price anyway).

Pedja

[infield]

I'll take one or two.

[seppstefano]

Ciao,
I beg your pardon for my fat ignorance but, would you point me to your site, so that I can get convinced in ordering one PCB of yours

Thanks a lot,

Stefano

[Andypairo]

Just press the "www" button that appears under Pedja's posts!

BTW I'm still collecting parts to populate the two boards you sent me (I had to order a bunch of transformers!) - one is still untouched - I have to read the whole thread to see if the newer version will be that better to feel the need of an upgrade

BTW the onboard I/V will be discrete or based on AD844?

Cheers

Andrea

PS I only could find OPA660 (actually 3 of them) so I'll try Thorsten's I/V (and even his tube output stage) to see which sound best.

[seppstefano]

Ahemm... err..., many thanks for help!

Really a wonderful source of info, thanks Pedja (and Andrea).

Ciao,

Stefano

[jsuen]

I will probably get one too.

[Pedja]

Originally posted by Andypairo
(...) I'm still collecting parts to populate the two boards you sent me (I had to order a bunch of transformers!) (...)

This is interesting, I was not aware of that the transformer could be a problem.

I can order locally the transformers with any windings I want for quite modest price and I found lately one manufacturer where the additional windings do not raise the price significantly. I have used previously one transformer for the digital part and another one for the analog stage but I believe also that the analog stage can be fed from the same transformer (but from the independent windings) without much of compromise.

However, as I do not have an intention to sell the kits or any part for this project, I recommend checking the solution for the transformer(s). Ideally, the digital part, excluding a reclocker which might be additionally hooked to the line which feeds, say, the digital part of the CS8412, needs 4 secondary windings of 7VAC and one of 22VAC. I/V in the case of AD844 needs something like 2x15V or 2x18V, probably a bit higher voltage if it will be discrete.

BTW the onboard I/V will be discrete or based on AD844?

Still don't know. Will have some info about this in a few days.

Pedja

[bzo]

Pedja, what is the VA rating on the transformers you're currently using? In North America, it shouldn't be too hard to obtain these custom transformers from a vendor such as Victoria Magnetics.

Anyone know of any vendors for the TDA1541A? I have one that I've been saving for such a project, but wouldn't mind building two.

[machinow]

Interested! Obviously we are close....
Can I help you with anything??