Do you think TDA1540 is old ? Do you think PCM53 is very old?Today I am making an older version of MP1936, enough to make MP1936 reappear in the world.which works in pure NOS mode. Reproduce a warmer sound than the TDA1540.The production is divided into four parts. The first audio source part uses Bluetooth, USB, CS8412-coaxial input, the second format conversion, uses pure NOS working mode, does not use any filter chips, and the third uses oversized DAC audio MP1936. The fourth part is the power supply part.
The TDA1540 may be one of the most popular DACs currently. Let me make it today. This time, the pure NOS structure is still used. Modular design. Up to 5 PCBs are required to complete the production. The first audio source motherboard with USB COMBO384 interface, Bluetooth CSR8675, CS8412 coaxial input. The second pure NOS format motherboard is compatible with TDA1541, but TDA1541 requires Simultaneous mode. The third DAC circuit with electronic tubes. 12AX7 compatible pins can be installed, such as 12AU7 and 12AT7. The fourth TDA1540 power supply is compatible with TDA1541, and you only need to change -15V to -17V to connect to TDA1541. The fifth high-voltage motherboard provides 12.6V and 250V required for the 12AX7.
DAC1136 is known as the oldest multi bit DAC, and its successor DAC1146 remains popular worldwide for its outstanding performance. Today, let me apply it to audio decoding. Still adopting the most classic modular design. Without electronic tube output, it will save a high-voltage power board. The entire structure requires 4 PCBs to be completed. Sound source, format, decoding, power supply.
DAC729 is one of the best parallel port DACs after PCM53. Let me make it today. There is no electronic tube output. So modularization can be achieved using 4 motherboards. The sound source includes Bluetooth, coaxial, and USB. And a set of external input I2S signals. The motherboard with sampling and holding format can be applied to the parallel port DAC. Decoding adopts the simplest LPF output to ensure the original chip effect. The power supply adopts adjustable precision voltage output.
AD company and BB company, 6-in-1 audio decoding DAC. 16BIT and 18BIT audio DAC decoding. Compatible with PCM56P, PCM61P, AD1851, AD1856, AD1860, and AD1861, balanced and single ended output, chip switching can be completed with only a jumper on the format board. Still adopting modular design. Can be freely combined. Just replace the decoding DAC motherboard and it can be compatible with more chips. For example, PCM58P, PCM63P, AD1862, and other serial port DACs.
ULTRA ANALOG D20400 Audio DAC. Currently, it is one of the best modular DACs in the world, but unfortunately, it has been discontinued. Many DIY friends want to have a machine made with UltraAnalog D20400. But the internal controller M72H035 has also been discontinued. There is no way to find him. The D20400 module in my machine is broken. I opened it. Now using digital gate circuits, D20400 can be remade. Only 8*100 ohm resistors need to be very precise. The design still adopts a modular assembly method. This production process requires 4 PCBs to complete. The sound source motherboard adopts CS8412 coaxial input, CSR8675 Bluetooth input, USB combo384 input，and the format motherboard has removed SM5803 and adopts pure NOS mode. The decoding motherboard is made of gate circuit and DAC7541, with a precision adjustable power supply.
Tda1541 has many friends around the world who like him. Today, let me create it and directly use an electronic drum output. This still belongs to my modular design. Using a sound source board and format board, remove the expensive SAA7220 and adopt a pure NOS structure. Decoding uses all electronic tubes compatible with ECC83 pins. The power supply is divided into chip power supply and high-voltage power supply. They are all separate modules.
Okay understand this part. So are you making the kits available to members here? Or are they just 'for display'?
I think you need to state your intention clearly.
If you are unable to purchase. I can tell you that this plan is completely feasible. You can refer to my configuration to complete it. I have a website in China that I can access. But you may not be able to purchase him. https://hikvocal.taobao.com/
This is my website and there are displays of these items in the DIY area.
Wishing everyone good luck
This is my website and there are displays of these items in the DIY area.
Wishing everyone good luck