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
October 14, 2006
ProAc 2.5 Clone
After I sold my Tannoy Turnberry, I buy a pair of smaller speaker from China. It was a ProAc 2.5 clone. The price is wonderful and I use this speaker till today! I have modified the internal film capacitors (3.4uF and 4.7uF) to Rifa film capacitors and it seems improve a bit in the mid and high frequency.
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October 13, 2006
Aleph P
This was made in year 2006. This is a simple version as I only do the pre-amp part and there is no input selector, remote control and volume control. I use a ladder type step volume control for each channel. The resistors are just normal 1% metal film resistors.
The sound is very smooth for this pre-amp but it lack the extension in super high frequency.
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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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