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PCB for TDA1541A DAC Project
PCB for TDA1541A DAC Project
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Old 12th December 2002, 01:17 PM   #1
TV Man is offline TV Man
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Location: US
Default PCB for TDA1541A DAC Project

Does anyone know where to get a PCB for a TDA1541A DAC project?? I can do the assembly, but would prefer to leave the board design to someone with more experience with DACs.

Thanks
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Old 12th December 2002, 07:54 PM   #2
tubesguy is offline tubesguy  United States
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Curcio has one, but it is a lot more than just the 1541. There's an opamp IV and output stage, and servo circuit for the output stage. - pat
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Old 12th December 2002, 08:14 PM   #3
scottnixon is offline scottnixon
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I hear rumors of one in February might appear, somewhere
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Old 13th December 2002, 04:19 AM   #4
TV Man is offline TV Man
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Default tubesguy and Scott

tubesguy: I came accross the Curcio board searching the web. Looks like a decent design, but I want to go with a true tubed output rather than a JFET tube buffered design. Might be worthwhile to use the PCB for power and DAC with a seperate board for the output?? Thanks for the reply

Scott: I bought one of your DACKITs preassembled a few months back when I was still living on Guam. Been looking at the tubed output with T's sinc filter lately, but my DACKIT is still on a ship somewhere out in the Pacific Ocean so I'll probably wait till it gets here for the output project.

Good news about the 1541A board... I've been hoarding some S1 chips recently. Up to 6 so far Been thinking about a crazy DIY Zanden style mega parallel 1541a setup. Too dang expensive though!!!

Keep us posted on the PCB. I'll definitely be ordering a few

Any idea on the design yet?? Send a private mail if you don't want to "go public" just yet.

THanks to both of you
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Old 13th December 2002, 07:35 AM   #5
PhilW is offline PhilW
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It appears that it is not absolutely necessary to use conventional pcb methods for making acceptable dacs. (I didn't - but I my setup is low-budget rather than high-end). There is advice on alternative approaches at http://www.tnt-audio.com subtitled "how to get rid of printed circuit boards".
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Old 13th December 2002, 11:15 AM   #6
ThorstenL is offline ThorstenL  Germany
Previously: Kuei Yang Wang
 
Join Date: Nov 2002
Default Re: PCB for TDA1541A DAC Project

Hi,

[B]Does anyone know where to get a PCB for a TDA1541A DAC project?? I can do the assembly, but would prefer to leave the board design to someone with more experience with DACs.

I would STRONGLY suggest against using PCB's. I have experiemnted myself and I find PCB's to rather reliably give a strong sonic degradation. This is worst for Fiberglass PCB's, less so for the brown pertinax PCB material and least but still notable for PTFE, when compared to hardwiring.

I figure this is the result of a combination of microphonics and the hygroscopic behaviour of the PCB Material. But basically and in short, in the interest of sund quality - avoid PCB's like a Vampire avoids Garlic, Crosses and Stakes.

Simply take a nice slab of copper, glue the chips on there "dead bug" style (legs up) and hardwire...

Sayonara
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Old 13th December 2002, 01:49 PM   #7
argo is offline argo  Estonia
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Default Re: Re: PCB for TDA1541A DAC Project

Quote:
Originally posted by Kuei Yang Wang
[B]Hi,

....
Simply take a nice slab of copper, glue the chips on there "dead bug" style (legs up) and hardwire...

Sayonara
How do you think chips secured by soldering their legs on Veroboard pads - then legs and components connected by hardwiring would work out?

Argo
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Old 13th December 2002, 06:33 PM   #8
TV Man is offline TV Man
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Default Dead bugs!!

Ahhhh, thanks for the advice. I knew a tech who used to do his hardwire dead bug style. Never knew why he did it that way.... but now I do. Very interesting idea. I'll give it a try

Thanks
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Old 15th December 2004, 10:28 PM   #9
tube-lover is offline tube-lover  Hong Kong
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Talking PCB for TDA1541A DAC Project

Dear TV man,

this is the tube buffer test print of the twins TDA1541a version II pcb.


This new PCB was added battery bias for 6C45/6Dj8 SRPP tube buffer. Also one more socket was added about for it. It is in Tube rectifier place. Then this pcb can use ez80,81.we412a & 6x4 tube.


thx

thomas
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Old 15th December 2004, 10:34 PM   #10
Peter Daniel is offline Peter Daniel  Canada
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PCB for TDA1541A DAC Project Send a message via AIM to Peter Daniel
Default Re: Re: PCB for TDA1541A DAC Project

Quote:
Originally posted by Kuei Yang Wang
Simply take a nice slab of copper, glue the chips on there "dead bug" style (legs up) and hardwire...
An example of this approacz was presented here: http://www.diyaudio.com/forums/showt...733&highlight=

It's actually pretty simple

BTW, the TDA1541 kit offered by tube lover is very good.
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