Any good TDA1541A DAC kit? - Page 56 - diyAudio
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Old 1st January 2014, 04:13 AM   #551
Ceglar is offline Ceglar  Australia
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Hi,

I built it point to point with carbon composite resistors and an old stock teflon socket. Loaded with pimm rev5 CCS using mu output. B supply tube rectified LC common filter then split LC for decoupling of channels.

Not sure you need a PCB for something so simple.

All the best.

Shane
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Old 1st January 2014, 01:16 PM   #552
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If someone wants to contact me about running a group buy for the boards(I/V or dac) I would be happy to release the files to the group buy. I just really do not have time or much motivation. The I/V boards I did use a CCS, but it would be easy to leave them off and use jumpers or just tap in a choke at the end of the CCS instead. I could also add a labeled pad if people would prefer.

Chris
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Old 14th January 2014, 06:59 PM   #553
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Default Thanks!

Quote:
Originally Posted by vanofmonks View Post
If someone wants to contact me about running a group buy for the boards(I/V or dac) I would be happy to release the files to the group buy. I just really do not have time or much motivation. The I/V boards I did use a CCS, but it would be easy to leave them off and use jumpers or just tap in a choke at the end of the CCS instead. I could also add a labeled pad if people would prefer.

Chris
Hi Chris:

I was very interested in your efforts and posted here, sent you emails and messages. I am still very interested but I don't have expertise and experience to take over this project. I am looking for boards and list of parts and some technical help in case things don't work.

Is there any senior member to lift the flag here?
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Old 15th January 2014, 12:53 AM   #554
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Quote:
Originally Posted by andrea_mori View Post
No, they used anode CCS, while I would use anode chokes as in the original Thorsten's 2005 schematic.
I meant the PCB from vanofmonks in post #479 or similar compliant with T's schematic.
However, how did you build it? did you get a pcb or what else?

SInce I'm planning to build T. output stage for myself, if there was interest we could design a PCB. Let me know if other members are interested.
If yes, starting from the anode choke mode, let me know what you think about:
- one E88CC/6DJ8/6922 or two E180F triode strapped
- chokes on the pcb or not (if yes we have to decide which one)
- B+ on the PCB or not (if yes regulated or unregulated)
- heaters supply on the PCB or not (AC, unregulated DC or regulated DC)
- output caps on the PCB or not (if yes we have to decide about footprint)

Andrea
Interested
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Old 15th January 2014, 05:50 AM   #555
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Quote:
Originally Posted by Ceglar View Post
I've built the stage and can confirm that it works well.

As for PCB, you're meaning the commercial offerings of the same by both diyhifisupply.com and parts connexion.com? ??


Regards,
Shane

Hi Shane:

I know the diyhifisupply.com tube output kit; it is beautiful and is designed by Thorsten. I don't know about any offering by partsconnexion.com. Can you please write some details or post link?

Regards
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Old 15th January 2014, 05:53 AM   #556
Ceglar is offline Ceglar  Australia
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Hi,

Sure, no problem.
connex-76155.html

I can't comment on this design as I don't have one, and really don't know anything about it other than whats stated.

The minimal bias cct using the 1541A DC offset relies pretty much on the 1541A, and therefore not universal at all. It is for this reason that I suspect it will be different. Similar enough perhaps, but different. .. And the core board is about the simplest cct you could make.

Regards,
Shane
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Last edited by Ceglar; 15th January 2014 at 06:22 AM.
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Old 15th January 2014, 06:07 AM   #557
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Quote:
Originally Posted by andrea_mori View Post
No, they used anode CCS, while I would use anode chokes as in the original Thorsten's 2005 schematic.
I meant the PCB from vanofmonks in post #479 or similar compliant with T's schematic.
However, how did you build it? did you get a pcb or what else?

SInce I'm planning to build T. output stage for myself, if there was interest we could design a PCB. Let me know if other members are interested.
If yes, starting from the anode choke mode, let me know what you think about:
- one E88CC/6DJ8/6922 or two E180F triode strapped
- chokes on the pcb or not (if yes we have to decide which one)
- B+ on the PCB or not (if yes regulated or unregulated)
- heaters supply on the PCB or not (AC, unregulated DC or regulated DC)
- output caps on the PCB or not (if yes we have to decide about footprint)

Andrea

Hi Andrea:

I believe Thorsten's stage is simple and there might not a need for PCB. Please correct me if I am missing something.

If you are going forward then,

--one E88CC/6DJ8/6922, just because there are plenty of them
--No anode chokes on PCB. DIYer might want to experiment with different chokes.
--Regulated B+ on PCB
--Regulated DC heater supply
--No output capacitors on PCB. DIYer might want to experiment with different capacitors and they can be big.

Related posts
Thorsten's tube Stage for TDA1541A

Regards
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Old 6th February 2014, 02:01 PM   #558
vzs is offline vzs  Europe
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Quote:
Originally Posted by Ceglar View Post
Zsolt,

Have you confirmed 352kHz up sampled real time via PC with Ians Dual XO driving 1541A via his PCM board?.

Regards,
Shane
Hi Shane, sorry for late reply, I didn't follow this thread.

Me not, I'm using an AD1865 based DAC, but Ian confirmed it's working: 352.8 KHz listening test on NOS DAC TDA1541A and PCM1704

Bear in mind that TDA1541A will run overclocked with 352.8/384KHz material _even_ with I2S-PCM driver mode set at half-speed mode.

Is it working for you at 352.8/384KHz? Are you satisfied with the whole setup?

Regards,
Zsolt
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Old 6th February 2014, 11:36 PM   #559
Ceglar is offline Ceglar  Australia
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Quote:
Originally Posted by vzs View Post
Bear in mind that TDA1541A will run overclocked with 352.8/384KHz material _even_ with I2S-PCM driver mode set at half-speed mode.

Is it working for you at 352.8/384KHz? Are you satisfied with the whole setup?

Regards,
Zsolt
Hi Zsolt,

Its very satisfying at anything up to 192kHz. Might have something to do with my implementation, but 352/384 distorts.

Regards,
Shane
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Old 19th March 2014, 02:59 PM   #560
Alexiss is offline Alexiss  Sweden
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Default Any good TDA1541A DAC kit

Quote:
Any good TDA1541A DAC kit?
Is there any good TDA1541A DAC kit, on eBay or elsewhere?
I have followed this interesting thread closely.

I wish Mr Joshua_G the best of luck. However I believe this will be a fruitless endeavour:

- AMR products are highly optimized designs, with the sole purpose of extracting the ultimate sonic performance from CD format.

- For this goal, many experts were contracted, and many contradictory technolgies used.

- Based on his documented efforts of Mr. Thorsten Lesch, it is safe to assume that he is one of foremost authorities on TDA1541-chip applications.



Technical competence, in addition to solid financial resources has resulted in AMR line of products.

It is illogical to assume that any company, let alone a chinese diy-supplier,
would spend time and money gathering the necessary technical know-how and financial resources
to produce designs that could rival the AMR line of prdoucts, and then for some unexplainable reason
make all this available in kit-format, off ebay, for 150 USD.

I would like to help you:

- There is a DAC design that I bought a while ago, and have tested.

- It is not based on the TDA1541 chip, but can be easily modified to accomodate the TDA chip.

- It can be further upgraded (easy) through the manufacturer with better PSU, nos, and possibly better analog output stage.

- This DAC is the result of the joint efforts of some former Phillips engineers at Eindhoven.

- I have personally had business assosciations with them, and they are very competent and professional:

DIY DAC

- It is, according to my humble (sonic) opinion, one of the very best DACs in existence today.

- I have listened to AMR products and I REALLY liked them.

- I believe this DAC can match many of the sonic qualities of DA777.



The very best of luck to you from the cold north.

Last edited by Alexiss; 19th March 2014 at 03:01 PM.
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