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Old 28th March 2010, 02:45 PM   #281
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Originally Posted by toufu View Post
18ma measured between V+ of the buffalo and Gnd.
When you measure current with a multimeter, the meter probes act as a dead short. Trying to measure current this way is identical to placing a wire across the power terminals (shorting out the Placid).
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Old 28th March 2010, 02:58 PM   #282
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I see the recommended voltage in for the Buffalo II is 5-5.5V and earlier in the thread it was said that you wouldn't be wise to go over 7v. Would I be ok with supplying 6V (battery) to the Buffalo II or have I answered my own question?
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Old 28th March 2010, 05:05 PM   #283
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OK Brian and Russ, I must say this is an amazing little dac, with 2 x SSR01 super regulators and placid with O-Netics output trannies. my active monitors (balanced) really sing. the sound is very clean and slightly more musical than V1, it has an ease in the articulacy that wasnt quite there before.

also I can confirm that there is zero need for any I/V resistor with the 600:600 line trannies from sumR, the impedance of the transformer is enough. atleast it sure sounds that wat to me. so it will live like this in a project box while I work on battery power solutions, I am going to have to buy at least another 1 tgho, these will make great presents fora couple of my friends.
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Old 28th March 2010, 05:15 PM   #284
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Originally Posted by fierce_freak View Post
I see the recommended voltage in for the Buffalo II is 5-5.5V and earlier in the thread it was said that you wouldn't be wise to go over 7v. Would I be ok with supplying 6V (battery) to the Buffalo II or have I answered my own question?
If you using the AVCC modules we provide then I would use exactly 5.5V for best results. The AVCC modules is not designed to work with input over 5.5V. This is because we are using an ultra low noise opamp to control the shunt that has a max supply voltage of 5.5V and it works best right at that spot in testing.
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Old 28th March 2010, 05:17 PM   #285
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Quote:
Originally Posted by qusp View Post
OK Brian and Russ, I must say this is an amazing little dac, with 2 x SSR01 super regulators and placid with O-Netics output trannies. my active monitors (balanced) really sing. the sound is very clean and slightly more musical than V1, it has an ease in the articulacy that wasnt quite there before.

also I can confirm that there is zero need for any I/V resistor with the 600:600 line trannies from sumR, the impedance of the transformer is enough. atleast it sure sounds that wat to me. so it will live like this in a project box while I work on battery power solutions, I am going to have to buy at least another 1 tgho, these will make great presents fora couple of my friends.
Excellent, I am glad to hear you are enjoying it.

Cheers!
Russ
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Old 28th March 2010, 05:44 PM   #286
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Originally Posted by qusp View Post

also I can confirm that there is zero need for any I/V resistor with the 600:600 line trannies from sumR, the impedance of the transformer is enough. atleast it sure sounds that wat to me. so it will live like this in a project box while I work on battery power solutions, I am going to have to buy at least another 1 tgho, these will make great presents fora couple of my friends.
So, what you are saying is that you can directly connect the output of the DAC to a 600:600 output trafo and be done with it. Is that correct?
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Old 28th March 2010, 06:24 PM   #287
qusp is offline qusp  Australia
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So, what you are saying is that you can directly connect the output of the DAC to a 600:600 output trafo and be done with it. Is that correct?
certainly seems that way to me. havent done any sweeps or measured the output of a full scale sine wave yet, but i'm certainly not lacking any gain. thought I would give it a shot without first before attaching the texas components resistive pots at the primary. I figured there is enough impedance to create a voltage across the traffo. no real DC to speak of, at the oputput of the buffalo II; so nothing to worry about there and any hash that might be there is probably mostly taken care of by the roll-off at 120k (something like that) 2. you could of course add an RC filter before if you like. thats what I find so appealing about transformer coupling. the elegance is significant
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Old 28th March 2010, 08:59 PM   #288
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Congratulations Russ & Brian,

Finally today hear mine configuration (Opus USB + METRONOME reg. Erno Borbely 7.5V + B II reg. Placid + IVY III reg. Placid BP).

Zero problems with the setup, superb sound, excelent work.
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Old 28th March 2010, 09:55 PM   #289
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Originally Posted by merlin el mago View Post
Congratulations Russ & Brian,

Finally today hear mine configuration (Opus USB + METRONOME reg. Erno Borbely 7.5V + B II reg. Placid + IVY III reg. Placid BP).

Zero problems with the setup, superb sound, excelent work.
Actually the congratulations are to you.

Good work!

Cheers!
Russ
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Old 28th March 2010, 09:55 PM   #290
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A bunch of flowers for Russ & Brian !
Just wondering, I have now 2 placids BP, a C.2.1.1. and a C2.1.2.
Is there any (sonic) difference between the 2 as I will use them to drive the IVYIII ?
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