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Post by pre65 on Jul 27, 2014 14:24:23 GMT
Bit of a long shot this.
I have a PCB from Analogmetric (the green one) which is for the TDA1541 chip and associated components.
There is a way to populate the board in a NOS (non oversampling) mode, but the instructions I had have been mislaid, or more possibly lost. Has anyone ever come across this board ?
A chap called Clive Messer was helping me, but I have no current contact details. 
There is some detail from Lampizator, but not sufficient for me to get started.
www.lampizator.eu/lampizator/REFERENCES/Green%20TDA%20DAC/Greendac.html
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Post by yomanze on Jul 27, 2014 14:32:49 GMT
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Post by pre65 on Jul 27, 2014 14:54:12 GMT
Thanks for that. 
The details to "convert" that fully populated board to non OS are given, but if the board is only built for non OS, then (as I understand things) only a third of the components are seemingly needed.
That is the information I am really after.
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Post by yomanze on Jul 27, 2014 19:45:09 GMT
If you are going NOS then you don't need the VD5+ supply going to the SAA7210B. In the Lampizator version he also cuts out all the output stage parts as he uses his own.
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Post by yomanze on Jul 28, 2014 19:15:53 GMT
If you've not built it yet there are better layouts and implementations than this PCB and output stage choice. Mr. Lampizator is a power and analogue engineer not a digital engineer and his digital stuff is relatively ramshackle, hence him not slating a lot of digital layouts in his writing and using generic circuits apart from SPDIF circuit bypassing. Will find some links including a simple yet very good output stage.
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Post by yomanze on Jul 28, 2014 19:18:53 GMT
Err I did not mean to like my own post...
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Post by pre65 on Jul 28, 2014 19:24:27 GMT
Thanks again.
I've had this PCB for some time. Every now and then it comes out of it's box, I trawl the net for inspiration, find none and put it away again.
Now I've splashed out for Martins Beresford Bushmaster 2 DAC the TDA1541 project will go back on hold again.
PS If you find any links I will give them consideration.
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Post by yomanze on Jul 29, 2014 15:17:21 GMT
I think the BM2 will beat this implementation of the TDA1541A. |
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Post by pre65 on Jul 29, 2014 15:26:01 GMT
I think the BM2 will beat this implementation of the TDA1541A.  |
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Post by MartinT on Jul 29, 2014 23:01:21 GMT
Err I did not mean to like my own post... LOL - I didn't even know that was allowed!
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Post by ChrisB on Jul 29, 2014 23:06:00 GMT
Err I did not mean to like my own post... Of course, it'll make you go blind, you know! |
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Post by MartinT on Jul 29, 2014 23:08:17 GMT
Now I've splashed out for Martins Beresford Bushmaster 2 DAC the TDA1541 project will go back on hold again. It'll be on its way to you tomorrow, Philip! |
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Post by pre65 on Apr 13, 2016 10:32:09 GMT
I'm still getting an urge to do something DAC wise with my TDA1541 chip.
Has anything occurred recently that might help me ?
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Post by pre65 on Apr 13, 2016 11:14:46 GMT
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Post by MartinT on Apr 14, 2016 7:06:42 GMT
It would be interesting to know if adding the valve does anything much - there are too many 'add flavour' circuits with a token valve in there to satisfy some latent need.
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Post by pre65 on Apr 22, 2016 9:12:08 GMT
I've now ordered one. 
I have got enough transformers in the spares box to power up the DAC, so no extra expense there.
It won't be with me for several weeks, so be patient for any feedback.
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Post by pre65 on May 9, 2016 19:19:01 GMT
The DAC came today, the PCB is fully populated, just needs the transformers and in/out wiring connected.
I'll mount it on some MDF for initial testing, but I'm busy this week so don't hold your breath for any results.
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Post by MartinT on May 10, 2016 5:32:09 GMT
Look forward to hearing about it.
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Post by pre65 on May 13, 2016 9:51:55 GMT
I've got everything mounted and wired up. Might find time to fire it up later.
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Post by MartinT on May 13, 2016 10:32:20 GMT
I love test beds!
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