Buffalo III - SE - Page 17

Russ White · 12:05 AM

Placid HD setup is identical to the positive side of the Placid HD-BP.

lhquam · 27th November 2012, 10:32 PM

I just started assembling boards for my Buffalo-IIISE and have a couple of questions related to the IVY-III board whose manual hasn't been updated recently.

For the Buffalo-IIISE, should the IVY-III resistors R32-R35 be omitted?
On the IVY-III board, what are the functions of SW1.1, SW1.2, and SW1.3? According to the schematic, SW1.1 enables a 1K resistor between +15V3 and -15V3. I suspect it should be left open. SW1.2 and SW1.3 short the outputs of the differential to single-ended amplifiers. When would you want to do that?

lhquam · 28th November 2012, 04:30 AM

My mistake about SW1. Not dip-switches but a relay to mute the single-ended output until to voltages are established.

Quote:

Originally Posted by lhquam

I just started assembling boards for my Buffalo-IIISE and have a couple of questions related to the IVY-III board whose manual hasn't been updated recently.

For the Buffalo-IIISE, should the IVY-III resistors R32-R35 be omitted?
On the IVY-III board, what are the functions of SW1.1, SW1.2, and SW1.3? According to the schematic, SW1.1 enables a 1K resistor between +15V3 and -15V3. I suspect it should be left open. SW1.2 and SW1.3 short the outputs of the differential to single-ended amplifiers. When would you want to do that?

lhquam · 29th November 2012, 04:16 PM

Can anyone comment on whether a chassis for the Buffalo-IIISE with IVY-III and power supplies needs vent slots or holes for heat removal?

BrianDonegan · 29th November 2012, 04:19 PM

Quote:

Originally Posted by lhquam

Can anyone comment on whether a chassis for the Buffalo-IIISE with IVY-III and power supplies needs vent slots or holes for heat removal?

It's a good idea. Since the Trident regulators are shunts, they generate heat by their nature. If you are using shunt pre-regulators, such as Placids, you will get a lot of heat from them as well.

BrianDonegan · 29th November 2012, 04:42 PM

Quote:

Originally Posted by lhquam

I just started assembling boards for my Buffalo-IIISE and have a couple of questions related to the IVY-III board whose manual hasn't been updated recently.

For the Buffalo-IIISE, should the IVY-III resistors R32-R35 be omitted?

There is no harm in installing them, but they are really only needed if you are using the V_IN terminals, such as with the Opus DAC.

Quote:

On the IVY-III board, what are the functions of SW1.1, SW1.2, and SW1.3? According to the schematic, SW1.1 enables a 1K resistor between +15V3 and -15V3. I suspect it should be left open. SW1.2 and SW1.3 short the outputs of the differential to single-ended amplifiers. When would you want to do that?

The relay is there to prevent thumps on the outputs. The 1K resistor starves current from the coil of the relay to cause it to close before the rail voltages collapse to the rest of the circuit.

herrstagl · 29th November 2012, 05:20 PM

Hi,

is it possible to buy the Buffalo IIIse DAC just as a kit, to save some cents?

Many thanks, tom

BrianDonegan · 29th November 2012, 06:16 PM

Quote:

Originally Posted by herrstagl

Hi,

is it possible to buy the Buffalo IIIse DAC just as a kit, to save some cents?

Many thanks, tom

No, only as a assembled module. It would be too much work/support to offer it as a kit.

supra · 2nd December 2012, 08:51 AM

Finished my buff3se and very happy with it, very high quality kit and sound.
I noticed the led's on XDD-XO Trident board aren't lighting up. Reg is working ok ,input 5.25V , output 3.4V. Is this normal?

avr300 · 2nd December 2012, 09:03 AM

No, its not normal.

27th November 2012, 12:02 AM	#161
Russ White diyAudio Member Join Date: Jan 2005 Location: Nashville, TN, USA	Placid HD setup is identical to the positive side of the Placid HD-BP. __________________ Less pulp more juice Twisted Pear Audio. Last edited by Russ White; 27th November 2012 at 12:05 AM.

27th November 2012, 10:32 PM	#162
lhquam diyAudio Member Join Date: Mar 2010 Location: Olalla, Oregon: Land of the 100 Valleys	I just started assembling boards for my Buffalo-IIISE and have a couple of questions related to the IVY-III board whose manual hasn't been updated recently. For the Buffalo-IIISE, should the IVY-III resistors R32-R35 be omitted? On the IVY-III board, what are the functions of SW1.1, SW1.2, and SW1.3? According to the schematic, SW1.1 enables a 1K resistor between +15V3 and -15V3. I suspect it should be left open. SW1.2 and SW1.3 short the outputs of the differential to single-ended amplifiers. When would you want to do that?

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29th November 2012, 04:16 PM	#164
lhquam diyAudio Member Join Date: Mar 2010 Location: Olalla, Oregon: Land of the 100 Valleys	Can anyone comment on whether a chassis for the Buffalo-IIISE with IVY-III and power supplies needs vent slots or holes for heat removal?

29th November 2012, 05:20 PM	#167
herrstagl diyAudio Member Join Date: Feb 2012	Hi, is it possible to buy the Buffalo IIIse DAC just as a kit, to save some cents? Many thanks, tom

2nd December 2012, 08:51 AM	#169
supra diyAudio Member Join Date: Jul 2004 Location: Margaret River West Australia	Finished my buff3se and very happy with it, very high quality kit and sound. I noticed the led's on XDD-XO Trident board aren't lighting up. Reg is working ok ,input 5.25V , output 3.4V. Is this normal?

2nd December 2012, 09:03 AM	#170
avr300 diyAudio Member Join Date: Sep 2005 Location: DK	No, its not normal.