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).
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.
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.
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.
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
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 ?
Thanks.
There is no serious difference in results, but the latter version is much easier to work with.
Cheers!
Russ
and this with Dale RN-65 for I/V and 12AX7 tubes.... so there is further space to tune up Damn, looks like everyone recieved their packages already....mine seems to be stuck at the customs for five days in a row now.
Are they stuffing the parts for me?
Hope they know how to solder....Emile
A few questions for Russ or Brian:
-the Metronome has a very good onboard regulator, would it do any good to use a placid to feed that regulator ? current?
- In the manual it is stated that the Metronome eliminates (almost) any incoming jitter.
So upgrading the clock/regulators from my CDPRO2M is therefore useless ?
-The Volumite uses a 5k lin pot, can i use a 10k LIN Alps ?
- I'm a little confused about the powersupply for the IVYIII.
If I don't install j1~j4, do I need 3 BP placids (pwr1/pwr2/pwr3) to power the IVY ?
3x +/- 15V at what current must i set the placids ?
- The BuffaloII can work with 3 single placids by removing L6/L7/L8, at what current ?
Why are VD pads still there ? Can I still use the AVCCshunt in this situation ?
I hope these questions are worth answering and could help others.
-the Metronome has a very good onboard regulator, would it do any good to use a placid to feed that regulator ? current?
- In the manual it is stated that the Metronome eliminates (almost) any incoming jitter.
So upgrading the clock/regulators from my CDPRO2M is therefore useless ?
-The Volumite uses a 5k lin pot, can i use a 10k LIN Alps ?
- I'm a little confused about the powersupply for the IVYIII.
If I don't install j1~j4, do I need 3 BP placids (pwr1/pwr2/pwr3) to power the IVY ?
3x +/- 15V at what current must i set the placids ?
- The BuffaloII can work with 3 single placids by removing L6/L7/L8, at what current ?
Why are VD pads still there ? Can I still use the AVCCshunt in this situation ?
I hope these questions are worth answering and could help others.
Absolutely they willI hope these questions are worth answering and could help others.
I'm rather curious as to what current the various subsections of the BuffII want.
For current draw you can find a nice table at glt's blog:
H I F I D U I N O: Buffalo II Specification and FAQ
For the CD-PRO2 you have already upgraded it quite a bit and you could simply take the S/PDIF or AES/EBU if you have the TPA MUX. The Buffalo II will take care of the jitter anyway. Personally, I would not bother with the Metronome.
H I F I D U I N O: Buffalo II Specification and FAQ
For the CD-PRO2 you have already upgraded it quite a bit and you could simply take the S/PDIF or AES/EBU if you have the TPA MUX. The Buffalo II will take care of the jitter anyway. Personally, I would not bother with the Metronome.
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A few questions for Russ or Brian:
- The BuffaloII can work with 3 single placids by removing L6/L7/L8, at what current ?
Why are VD pads still there ? Can I still use the AVCCshunt in this situation ?
I hope these questions are worth answering and could help others.
You cannot use Placids to generate 3.3V because the dual LED reference is already 4V. If you remove one LED, then the reference is 2V, but the opamp is not a "rail to rail" type which means the lower limit for the voltage is around 2V... I asked this before and you could experiment with replacing one LED with a diode, giving you something like 2.6V reference...
The 1.2V supply cannot be generated by Placid...
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