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Old 16th November 2012, 09:11 AM   #31
qusp is offline qusp  Australia
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Quote:
Originally Posted by Robert F View Post
A very common characteristic of feedback regulators...the information about this is included in its data sheet much as it is with IC reg's.
you must be using some pretty badly described regulators, the info in the datasheet is very limited. they do not touch on dynamic behavior, which I would think pretty important if it cant deal with capacitance on its output. It has no noise or impedance vs frequency graphs etc. . the pics (fig.8) showing application do not look very conducive to low noise either, point to point with no ground plane or a return closely coupled to the output which goes through a huge film cap, looks like a dipole aerial to me.

use something like that in a dac or near a switchmode supply it could easily resemble a repeater station

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Output capacitor not recommended (see app notes).
thats a pretty flat statement, any capacitance from the load to ground could be considered output capacitance
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Old 16th November 2012, 09:16 AM   #32
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Originally Posted by john curl View Post
One is based on physics.
Physicist here. No it's not, it's based on cargo cult science.
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Old 16th November 2012, 09:32 AM   #33
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I will remove them from my amp. It is s... ! I friend off me wanted them in his Mark Levinson 29 but I do not dare to try after this.
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Old 16th November 2012, 09:51 AM   #34
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But they work fine in the dac !
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Old 16th November 2012, 10:09 AM   #35
SY is offline SY  United States
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Originally Posted by Robert Kesh View Post
Physicist here. No it's not, it's based on cargo cult science.
Sorry to disagree. Many of his products are indeed cargo cult pseudo-science frauds. This particular one is a straightforward regulator with mediocre performance.
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Old 16th November 2012, 10:12 AM   #36
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Yeah I have working amps again.
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Old 16th November 2012, 10:23 AM   #37
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Originally Posted by Erlend Sæterdal View Post
Yeah I have working amps again.
Pulling too much current - Reg shutting down?
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Old 16th November 2012, 10:34 AM   #38
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Originally Posted by cliffforrest View Post
Pulling too much current - Reg shutting down?
The music rails shut down or defect. Maybe my CRCRC on the input produce more noise than the Music Rail accept.
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Old 16th November 2012, 11:17 AM   #39
DF96 is offline DF96  England
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Originally Posted by Robert F
DF 96 was a participant in that thread and ought to know better.
My apologies. I got the two Bybee devices confused. This one is some sort of active noise canceller, and probably does what it claims. The other one is the one with 'classified' allegedly 'near room temperature superconductors' (actually doped ceramics, which may have a similar effect as a lossy ferrite bead). It is a pity that a functional (albeit expensive) circuit comes from the same stable as quantum nonsense.

Last edited by DF96; 16th November 2012 at 11:17 AM. Reason: typo
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Old 16th November 2012, 11:28 AM   #40
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http://www.bybeelabs.com/uploads/J04...Capacitors.pdf

Caps at the output are allowed. Greater than 20 uf. or less than 100 nf. So I wondere why it did not work for me.

To much noise at the input off the Bybee ?

Last edited by Erlend Sæterdal; 16th November 2012 at 11:30 AM.
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