Build Thread for TPA BIII + Ian Async I2S FIFO + OPC NTD1 + Salas SSLV

[adelias]

It probably would have been better to use one heatsink per channel and maybe use a spreader.

[qusp]

a spreader is not often a good idea, it doesnt actually make anything more efficient, rather less efficient. Jan was kind enough to put that article online free. its written for the F5X by EUVL, but translates to pretty much any thermal dissipation solution.

weird, I somehow deleted a line I wrote. basically thanking Patrick for putting together such a thorough and excellently written, well researched article on a not often covered topic. Heatsink RTH rating and how the placement and spacing of devices across the heatsink relates to it, along with how it matters to us for audio using power devices in Class A. Thanks Patrick!

[bigpandahk]

When I bought this power amp case for the DAC, I thought it should have plenty of space to accommodate everything, but when I have all the devices in hand, I find that I was wrong.

With the transformers, NTD1, SSLV, FIFO and BIII, there left no space for the Arduino, relay boards, battery, some more regulators ....

I haven't tested the 5V supply on the NTD1, I connected a 12Vac to the input and power it up. It has 4.99V output, but within one minute, the PCB near one of the diode burnt, found one diode shorted and another one broken. Other components seems fine. Have to repair the PCB and order some replacement diode and test again.

As the BIII will be powered by SSLV, I will modify the 5V supply on NTD1 to 10V for the Arduino, with a secondary regulator to power the 5V relay boards.

Still have a long way to finish this project.

[MisterRogers]

I know mate - it's amazing how quickly a case will fill up. I ended up with a 16in x 11in x 6in tall; i needed the height and a second deck to fit it all :-) You'll probably hate to hear this, but I'm testing an Amanero board + Acko reclocker using Ian's si570 board for the reference clock. The si570 & reclocker/isolator is battery powered, using Ian's Battery Management board to manage. It's replacing a full FIFO stack (FIFO, Isolator, si570) + an larger USB receiver (eXD), + and OttoII to switch off I2S/DSD.

I have to say - the new source components sound pretty damn good, and I get the benefit of DSD isolation/reclocking too. I'll give it some play time, but these components make for a simpler chain, fewer components, less space needed. The Amanero + Acko's reclocker/Isolator combination is a fantastic value so far.

[bigpandahk]

my case is just a little smaller than yours, 12in x 13in x 4.5in tall. I also plan to stack some devices and hope can fit it all.

I have both the WaveIO and Amanero. WaveIO will connect to FIFO TTL input. Amanero with two OTTO, connect to FIFO when not DSD and direct to BIII for DSD.

It will be great if you can show me the connection between Amanero, Acko reclocker and si570.

[palmito]

Originally Posted by MisterRogers

I have to say - the new source components sound pretty damn good, and I get the benefit of DSD isolation/reclocking too. I'll give it some play time, but these components make for a simpler chain, fewer components, less space needed. The Amanero + Acko's reclocker/Isolator combination is a fantastic value so far.

MisterRogers, did you start a thread on your Amanero/Acko islator/reclocker setup? If not, how about starting one? If it works out many of us would be very grateful, if it doesn't work out then it's documented for others not to go that way?

Thanks

[MisterRogers]

It's very straightforward mate; last page or so of the Amanero reclocker GB thread, Acko posts some PDF's showing various implementation configurations. I'm currently running the the config with the si570 mastering both the RCLK/Reclocker and the BIIISE. I'm not powering up the onboard clock on the Buffalo, using the si570 clock instead.

My reclocker build is the SO2 board using the potato semi flip-flop, with isolator. Worked right away, and the lock is rock solid.

[bigpandahk]

That's what I need. I can concentrate on the S02 and order the components.

Thanks MisterRogers.

I've ordered some TI evaluation PSU boards. One problem on those boards is there is no mounting hole on the board and I am not sure where can I drill!!!!

[AR2]

Guys,
what could help you a lot is if you have a separate case just for PS. You could have all your transformers and pre regs, than just run a big cable with many connectors - an old SCSII works perfect for that purpose. The benefits are multifold.

[qusp]

why arent you utilizing the heatsinks on your case BPHK?

AR2 I prefer these which i'll also be using for the speakers