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Old 9th March 2010, 10:38 PM   #131
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Quote:
Originally Posted by NicMac View Post
Well - I might have a B32S for sale soon......
My BII is (hopefully) on its way soon too

I'm so excited I keep checking the TP site for new documentation (hint).
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Old 10th March 2010, 12:07 AM   #132
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Originally Posted by Duffy Moon View Post
I'm an impoverished student
Likewise... thanks to the BII, and the Paul Hynes regs...
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Old 10th March 2010, 01:44 AM   #133
HaLo6 is offline HaLo6  United States
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thats what I figured... nope I have my B32 in a nice home ...
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Old 10th March 2010, 11:26 AM   #134
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Originally Posted by HaLo6 View Post
Has anyone compared the B32 to the BII? I wouldn't imagine that there shouldnt really be a need to switch is there? Is the performance delta between the two significant?
Given the improved dac supplies on-board the new BII, I think it will sound better stock than the B32s. This is just a guess on my part. If you have a B32s, and want to gain a similar level of improvement, have a look at the Buffalo Tweaking thread in the digital line level, which has some excellent suggestions (later in the thread) from a few people, regarding modification of the dac/xo supplies.

Best upgrade for myself have been moving to shunt supplies for the IVY on my B32s.
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Old 10th March 2010, 04:21 PM   #135
Crafty is offline Crafty  United Kingdom
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Default Buff 2 Dimensions & Power

Hi Russ / Brian,

I am looking fwd to the arrival of my Buff2 kit with dual mono placids for VA.

I am about to order the casework for my build and have a couple of questions:

) What's the total height of the stacked assembly of Buff2 / IVY3 including all standoffs?

) I read a post somewhere that reccomended setting the VD placid for 350ma @ 5.5V Is that correct?

The reason i ask is i am keen to get all of this into a 1U case, i did this with Buff32S by changing the heatsinks on the placid's to 1" parts. I am concerned that with a higher current demand for VD i wont be able to get away with 1" heatsinks? If its a no go i will look into a 2U solution?

) Any benefit to housing the Placid's and transformers in a seperate enclosure or could this potentially be worse?

Thanks,

Luke
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Old 10th March 2010, 06:37 PM   #136
glt is offline glt  United States
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Quote:
Originally Posted by Crafty View Post
Hi Russ / Brian,

...
The reason i ask is i am keen to get all of this into a 1U case, i did this with Buff32S by changing the heatsinks on the placid's to 1" parts. I am concerned that with a higher current demand for VD i wont be able to get away with 1" heatsinks? If its a no go i will look into a 2U solution?
...

Luke
You could install the power transistors to the case like this:
Click the image to open in full size.
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Old 10th March 2010, 06:47 PM   #137
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Quote:
Any benefit to housing the Placid's and transformers in a seperate enclosure or could this potentially be worse?
Some people like doing this, but I would recommend against it.

Quote:
You could install the power transistors to the case like this:
...what he said. We designed the Placid specifically for this application in short cases. Aluminum cases are MUCH better for this type of application then steel, as aluminum will dissipate the heat faster (steel gets hot and stays hot).
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Old 10th March 2010, 08:32 PM   #138
Marek is offline Marek  Poland
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I have a question about current output mode. It was mentioned that Sabre DAC switch to current mode with load less than ~700ohm.
What total current DAC can deliver on output? (it will be sum of 4 internal DACs currents per channel).
I'm going to use Lundahl LL1517 output transformer as output stage with BII and I wonder if I can do this without any aditional transistor buffers because primary winding inductance is about 0,6H, and each primary has ~10ohm DCR.

Thanks
Marek
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Old 11th March 2010, 03:18 AM   #139
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When's the next pre-order coming around?

Thanks

JD
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Old 11th March 2010, 03:35 AM   #140
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Originally Posted by Jeffrey Davison View Post
When's the next pre-order coming around?

Thanks

JD
We are shooting for early April.
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