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Old 13th August 2004, 08:58 PM   #31
agent.5 is offline agent.5  United States
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Join Date: Aug 2003
Location: San Francisco, CA

just wondering if you will just sell the kit of the DAC, without the opamp or tube output stage? Also, will you disclose the schematic (at least the location of the I/V resistor) so we can connect the DAC to our own output stage?
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Old 13th August 2004, 11:16 PM   #32
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Join Date: Feb 2004
Location: auckland
Default info you need is here

http://johnson.tmfc.net/audio/file/ -for schematics.

If you have 230V mains supply, the transformers Tubelover supplies are well worth getting.

Incidentally, I have tweaked my i/v resistors to 27 ohms, rather than the 22ohm supplied. The improvment was well worth it.
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Old 14th August 2004, 02:53 AM   #33
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Location: Hong Kong
Talking //TDA1541A PCB Already

For peter & SS1,agent.5,

pls email to me for detail of the kit.

thew kit will come with all chips.

1. OFC gold plated PCB of the digital section 1pc
2. OFC gold plated PCB of the I/V and output section 1pc
3. OFC gold plated Tube buffer.
4. Crystal CS/CX8414 receiver chip 1pc
5. Philips TDA1541A 16-bit D/A chips 2pc
6. Shunt regulators & all parts.
7. All transistors, caps resisters, All were Elna, CGW, dale, pureism etcs.
8. Now all the kits will come with MKP 250V 10uf cap for tube buffer 6X4 rectifier use.
pls email to me.



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Old 19th August 2004, 08:18 AM   #34
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Join Date: Feb 2004
Location: auckland
Default my finished dac, with cd pro 2m

Just to show that mine is up and running.

A somewhat industrial looking setup [at present], running and sounding fine, with 6c45pi tube buffer, decoding i2s [the spdif is fine also]. the bird's nest of cables on the right of the chassis are my solid core silver cables.
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Old 25th August 2004, 11:41 PM   #35
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Location: Earth
Can you sell the pcb only and how much? I have the tda1541 and the cs8412 chips aready
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Old 29th August 2004, 02:26 AM   #36
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Join Date: Feb 2004
Location: auckland
Default Got tube buffer hum? solution may be here

I have had a lot of problems with low level hum. I applied all the usual earthing techniques to no real effect, getting to the point of remoting my transformers, and sending 11 AC signals to the DAC, also to no avail [not recommended, incidentally].

Then I read through the amendment Thomas wrote about, with regard to C5's replacement, and applied it. Must have missed it before.
I now have no audible hum at all, even at full volume.
I would say that if you haven't applied this modification and can hear hum it is well worth it. A dramatic improvment.

Oh yes, the bass is better too...''
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Old 29th August 2004, 06:09 PM   #37
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Join Date: Jul 2004
Location: Hong Kong
Talking TDA1541A PCB already

Dear nickC,

pls email to me for detail.


Tim, thanks for your helpful.

The clock & re-clock will coming same time, follow with same PCB, U can choose by your taste.

pls see my another thread.


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Old 29th August 2004, 10:36 PM   #38
Coulomb is offline Coulomb  England
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Location: Ancaster, Ontario
What other thread Thomas.

BTW I went through the kit and I must say the Board quality is the best I have ever seen. I think the qualit of these boards could easily rival the quality of High End products.


I like to stay current!
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Old 29th August 2004, 10:43 PM   #39
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I think it's this one:
Non-Oversampling TDA's
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Old 2nd September 2004, 09:07 PM   #40
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Join Date: Apr 2004
Location: Atlanta, GA
Anybody know where I can get some nice R-core transformers for this kit in the US?

Or, how much worse would regular toroidals be?

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