It is possible to destroy any Music Rail if a dead short is switched in. There is overload protection, but no protection against a dead short. Otherwise it is possible to destroy it if the Music Rail latches up. This can happen if the input is not bypassed or if certain small values of output capacitance are present.There is some other problem causing the loss of output. Can you measure the noise on the MR output ?. Try using a scope or sensitive AC meter. It should be lower than 10mV. What is the noise at the MR input ?. Also, compare the input noise vs output noise with a scope. Do you see an oscillation at the MR output ?
Ensure that the output noise is lower than the input noise, and that there is no sinewave or oscillation present on the output. A scope should show just a small band of noise on the highest level of magnification.
Ensure that the output noise is lower than the input noise, and that there is no sinewave or oscillation present on the output. A scope should show just a small band of noise on the highest level of magnification.
You didn't work out which product I was discussing, did you.
My overwhelming impression of this.company is that they either sell nonsense, OR perfectly good products marketed with added nonsense as a way to charge enormously over the odds.
Either way they should be ashamed of themselves.
No dead short at any time. No small values of capacitance at the output. There was aprox 90 uf.
Erlend, something definitely went WRONG. Perhaps, a bad connection, however, once you start raising the voltage above 30V or so, (not 60 like I first thought), you CAN destroy the device, IF it is not wired properly.
Of course, it MIGHT be defective, but this is a device that I am pretty sure is pre-tested before shipping.
For the record, it is basically an IC op amp that does the heavy work, the rest of the voltage about 30V is taken up by a Zener diode.
Dimitri, who is on this website, might be able to give you further input on this device.
Of course, it MIGHT be defective, but this is a device that I am pretty sure is pre-tested before shipping.
For the record, it is basically an IC op amp that does the heavy work, the rest of the voltage about 30V is taken up by a Zener diode.
Dimitri, who is on this website, might be able to give you further input on this device.
You really do like to have the last word don't you (pot kettle)
. However have you ever studied the characteristics of a Jung super regulator or variations thereof? If you have you will know that they are very twitchy regarding output capacitors, anything with too low an ESR asks for oscillation.Any way my point is solely that the Bybee should not be condemned by this fact alone.
Secondly, I agree fig 8 has an extremely wide loop area but it is an illustration of a high voltage application, not particularly likely to be used in a DAC but not at all atypical of tube circuits or even power amps where one often sees filter caps many centimetres from the output devices and equally remote from a ground point. Not that I condone such practices of course!
I wonder if you are looking at these devices for their intended use? The bybees seem to me to be a convenient add on to improve existing supplies. If one were building a supply from scratch, an actual voltage regulator, which the bybee is not, may well be the superior solution.
I must buy that issue of Linear audio, that article sounds fascinating.
Robert said:You really do like to have the last word don't you (pot kettle)
Any way my point is solely that the Bybee should not be condemned by this fact alone.
who said it was that alone?
yes, yes I do haha... but I dont think that really applies in this post, i'm simply replying.
I've used all manner of regulators including the Jung, numbers of wide bandwidth regulators/amplifiers don't enjoy driving capacitance, but there is enough info to make a proper decision, mostly because youve probably built it yourself.
I would not agree with a one size fits all Jung reg sold as an upgrade for circuits that are not going to suit it either and I have recommended builders here to avoid putting caps on the output. by itself its not a big deal, but given the broad sweeping recommendations they make for using it....thats a bit more problematic
the Jung reg has the advantage of being extremely high performance to make up for it, you might consider modifying your build to accommodate it, a trait not shared by this device.....
tube 'IV' stages are pretty popular here from what i've seen, but I take your meaning.
tubes are pretty darn wide bandwidth too are they not? even moreso due to often being used with low feedback.
but yes lets not go there... I sense we agree
tubes are pretty alien to me, but I have witnessed and....erm.. wondered about such circuits...
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Ah, that isn't saying much. My Aglient triple supplies are useless for low noise work.
Just curious, what frequency range do Bybee music rails work at for curring noise, just curious...as other active noise reduction I have seen used on an number of systems worked at quite high frequencies, for the lower frequecies big inductors seemed best.
An example of active noise suppression device:
http://cdn.vicorpower.com/documents/datasheets/Picor/ds_qpi3L.pdf
An example of active noise suppression device:
http://cdn.vicorpower.com/documents/datasheets/Picor/ds_qpi3L.pdf
I take that would require up front cost not justified by the number sold in this market ? Glad to see you are doing well the last time we meet face to face was when I ran it to you and Saul Marantz at CES .
RobertF, please learn to use the quote function properly. I have fixed a number of your posts. If you need help, shoot me a PM. Thanks- Status
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