These are the converter boards designed to be used for D1Vx DAC. It can replace CS8412 in DIP format.
Stock can be purchased in store.
January 10, 2007
September 6, 2006
TDA1541 SZ DAC
Update on Nov 12, 2009:
Since the Jfet IV of the DAC should be upgraded to K369BL to gain sonic performance, thus this is completed on Nov 12, 2009. See the last two photos. Some measurements are done after this modification using AP-2522. Distotion is about 0.5% but surprisingly, the listen test is quite smooth due to high 2nd harmonics. See FFT measurement below.
Last update on Sept 6th, 2006:
This is the second kit I do on TDA1541. Since I only buy the PCB, I can add the Jfet IV for this DAC to test out the overall performance.
It use CS8412, SAA7220 4 times oversample filter, TDA1541 DAC. The pcb come with a op-amp IV or tube IV but I am not using it at all.
The final version is with Jfet IV + B1 buffer and a volume control. The target is to drive a power amp from this DAC+Preamp all in one set. Due to the limitation of TDA1541 performance, the overall result is not as good as the Lite DAC-50 with Jfet IV.
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July 9, 2006
TDA1541 Thomas DAC
This is not a great DAC overall. Sound is below Lite DAC-50.
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Documentation:
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June 9, 2006
Lite DAC-50
This is my first PCM63 DAC. It uses CS8414, DF1704 and PCM63P-k x 2 pcs. The IV is resistor with 6922 SRPP tube output stage design. Overall the sound is smooth but it lacks of details. It is more or less the problem of SRPP and output drive is not good enough for most transistor preamp due to high output impedance. Thus it will also be sensitivity to signal cable used.
First modification is to use D1 mosfet IV, the result is improved on clarity and details.
Second modification is to use Jfet IV (K170BL). Later the IV is upgrade to K369BL in Jan, 2010.
Third modification is to add super low noise regulator.
Fourth modification is to add a power transformer and also two output audio couple transformer for balance mode.
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November 8, 2003
CS4398 Evaluation Board CDB4398
CS4398 is a voltage output 24bit DAC. I have tried to modify this DAC evaluation board using Audio transformer Lundahl LL7902 as the IV filter. The performance is not much different from the original design using op-amps. Overall this DAC do not sound great!
I cannot find any picture yet and I shall post it here when available.
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