Buffalo III - SE

[Russ White]

For safety, your chassis should be connected to mains earth. Nothing else need be.

[BrianDonegan]

If you do decide to connect the DAC/PSU/Signal grounds to the chassis ground, do so in only one place (star ground). Multiple ground paths will result in ground loops and noise.

If you are using TPA components and wiring correctly, the DAC's ground will be connected to the PSU's ground and the output stage's ground already, so only one connection to the chassis would be needed.

[Truetone]

Thanks guys, Everything worked perfectly from switch on. I have the ps in a separate box (earthed) and just ran 2 wires to the dac. The transformer secondaries are 0v referenced at the power amp only.

May I say huge thanks for the great sound - really enjoying it on usb - not just flac files etc sound good, but listening to U-tube jazz lessons is a whole new experience.

At present using a 317 reg ps - planning to upgrade to Placid. Any comments on difference to expect?

best wishes, martin

[manudrz]

Instead of the green leds mounted on the PCB, can I put two blue leds (mute/lock) on the front of my box ?
Blue leds are 2 mm - 3V - 30mA max

Also, to get a little off buffalo-topic, when I'm sure placids work properly, can I remove the green LEDs? I'm afraid it could illuminate through my air holes :/

[Russ White]

Blue LEDs have a bit too much forward voltage.

No you cannot remove the LEDs from Placid - they are an integral part of the circuit.

[Russ White]

Originally Posted by Truetone

Thanks guys, Everything worked perfectly from switch on. I have the ps in a separate box (earthed) and just ran 2 wires to the dac. The transformer secondaries are 0v referenced at the power amp only.

May I say huge thanks for the great sound - really enjoying it on usb - not just flac files etc sound good, but listening to U-tube jazz lessons is a whole new experience.

At present using a 317 reg ps - planning to upgrade to Placid. Any comments on difference to expect?

best wishes, martin

Glad to hear it!

The difference is subtle, but things will definitely be a bit better.

[manudrz]

Ok, I let the green ones in place...

[Truetone]

I noticed the green LEDs on the DVCC Trident don't light up (they are all lit on the VDD and VDD_XO) Is this normal? I have confirmed the ps voltage at the input is correct (5.25v)

thanks,

[Russ White]

Originally Posted by Truetone

I noticed the green LEDs on the DVCC Trident don't light up (they are all lit on the VDD and VDD_XO) Is this normal? I have confirmed the ps voltage at the input is correct (5.25v)

thanks,

No. It is not normal. What is it's voltage output?

[manudrz]

I've tested one of my blue led, it lights up with two aaa batteries, and I measured 2.7V, I think I'll try these leds on the lock/mute