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Buffalo II

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#62
OK, back on topic! - I have a dual mono Buff II in pre-order and I have a few questions:
1) Any suggestions for "stacking" these modules using high quality "plug" connectors rather than wires? Digital signal input, Volumite (I2C) and output stage?
2) What is the current draw of the IVY III positive and negative rails?
3) What is the current draw of Buff II @ 5V?
Thanks,
Nic
 
#63
well the molex connectors are pretty good and i'm sure they have some pin headers that would suit, but finding the right ones amongst the literally thousands of parts they have is daunting to say the least. I would be interested in these as well if you find the part numbers. low impedance copper pin headers = win over wires or connectors anyday i'm in agreement there
 
#64
I can highly recommend the ethercon line for i2s, (sorry brian, last i'll say)

so this is all getting rather interesting. now looking into a suitable battery supply circuit. thinking i'll just use a modified version of the tangent PPAv2 battery supply, rail splitter/vground circuit with some SMD super regulators. using the neutrik minicon connectors for the headphone connection. as a rule Ihavent liked the neutrik stuff too much in the past, but the upper end of their stuff and purpose built things like ethercon, powercon and minicon are all really nicely made products. the minicon is superb and very well built. so much more suitable for a balanced headphone connector than 3 or 4 pin XLR IMO.

there will be some worried high end producers out there at the moment, the pricing of this setup brings what can reasonably be called high end to the grasp of people that may not have been able to afford it before.
 
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#65
NicMac said:
OK, back on topic! - I have a dual mono Buff II in pre-order and I have a few questions:
1) Any suggestions for "stacking" these modules using high quality "plug" connectors rather than wires? Digital signal input, Volumite (I2C) and output stage?
Click to expand...

The IVY BOM on the web site now lists the headers I will be supplying for stacking the Buffalo on the IVY. With the supplied .625" standoffs, they fit perfectly. Both header and connector are gold plated for reliable mechanical contacts.

2) What is the current draw of the IVY III positive and negative rails?
3) What is the current draw of Buff II @ 5V?
Click to expand...

I meant to measure this before shipping all my protos off to Russ the other day, but my brains are spilling out on the floor at the moment and I forgot. He will be able post the numbers the final IVY numbers in a day or two.
 
#71
Pull down resistor value

Really looking forward to receiving my Buffalo II next month.

In the mean time I gathering/resurrecting my I/V options. Can you tell me the value of the "pull down" resistors?

I am planning to try a transformer conversion, a Welborne Cato set-up, a Borbely board if I can reserrect 24V supplies and a Lampizator V out.

Thanks for providing such a great experimental platform.

Best

Bob
 
#72
NicMac said:
OK, back on topic! - I have a dual mono Buff II in pre-order and I have a few questions:
1) Any suggestions for "stacking" these modules using high quality "plug" connectors rather than wires? Digital signal input, Volumite (I2C) and output stage?
2) What is the current draw of the IVY III positive and negative rails?
3) What is the current draw of Buff II @ 5V?
Thanks,
Nic
Click to expand...

1) The connector Brian has selected for the kits is excellent. 🙂
2) An IVY III does About ~90ma per rail. If you set the Placid BP for 150ma you will be in great shape.
3) I would run ~5.5V(but not over). About ~290ma I would set the placid for about 350-400ma.

Cheers!
Russ
 
#80
I'm interested (having a set of BII's on order). I guess that the phase of each DAC is set by the µC so why not have them all in the same phase and use a single IVY? I guess stacking would not be possible any more, but beside that?
 
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