Hi,
I'm in agreement with everyone else on this.
A regular fuse may have blown though but just in case double check alllll your wiring/circuit make sure the rectifier is wired properly and the caps aren't in backwards, just test the power supply on its own at first with the UCD removed from the circuit.
You can tell a slow blow fuse right off from a regular one, the wire inside is coiled.
Sizing the fuse: There's no science to it. Once you can power it up OK, try to find a slow blow where the wire just sags a bit when you first turn it on, then move up a few sizes until it doesn't sag anymore, this would be the best value to use in that it won't blow just from turning it on a few times and should burn quickly enough in case of a problem.
I'm in agreement with everyone else on this.
A regular fuse may have blown though but just in case double check alllll your wiring/circuit make sure the rectifier is wired properly and the caps aren't in backwards, just test the power supply on its own at first with the UCD removed from the circuit.
You can tell a slow blow fuse right off from a regular one, the wire inside is coiled.
Sizing the fuse: There's no science to it. Once you can power it up OK, try to find a slow blow where the wire just sags a bit when you first turn it on, then move up a few sizes until it doesn't sag anymore, this would be the best value to use in that it won't blow just from turning it on a few times and should burn quickly enough in case of a problem.
I have a big problem (I think) on the speaker outputs there is 14vdc!! why??
i have a 200va 2x33v trafo, 2x35A/600v rectifiers, 2x 10000uf capacitors.
i have only one module connected, shouldn´t matter right?
the blue led is shining so the module shouldnt be broken? could it be broken and still the light would work?
please help me, and sorry for my english, (I´m from sweden).
i have a 200va 2x33v trafo, 2x35A/600v rectifiers, 2x 10000uf capacitors.
i have only one module connected, shouldn´t matter right?
the blue led is shining so the module shouldnt be broken? could it be broken and still the light would work?
please help me, and sorry for my english, (I´m from sweden).
sounds like a cooked output fet, fets usually fail closed/shorted, so it could short the rail voltage to the output, but yeah you'd think the protection would kick in, is your module modified at all? I believe when the protection circuitry is working the light will blink on /off every few seconds.
Far as I recall its' only current limiting though.
I don't think there's any DC voltage protection on it.
No need to freak out about it anyway, Jan-Peter seems excellent in supporting his product I know he'll fix you up one way or another. Might want to send him an email about it in case he should miss your post though.
Far as I recall its' only current limiting though.
I don't think there's any DC voltage protection on it.
No need to freak out about it anyway, Jan-Peter seems excellent in supporting his product I know he'll fix you up one way or another. Might want to send him an email about it in case he should miss your post though.
There is no need for any excuses. Your english is very good!kvistarn said:
BTW, kvistarn, do you have three wires from the PS, +45V, -45V and ground and all are connected?
I could easily be wrong here but how did you measure it ? Without load I would not trust the value. Connect a 100 Ohm resistor or something and check again. Without a load there is some switching residuals that could easily cause misleading readings. An oscilloscope would be useful.
UrSv, no, no more switching residuals in no-load condition, why should there be? A multimeter should be perfectly adequate, especially since the UcD has very little switching noise on its output.
Kvistarn, check first the rail voltages are ok on the module itself.
If they are, it would be a good idea to find out which of the two stages (buffer or power stage) is guilty for the DC offset. For this I would suggest to desolder the 22uF interstage coupling capacitors (or the straps which replace them depending on version), and then turn on and measure outputs of both stages.
Kvistarn, check first the rail voltages are ok on the module itself.
If they are, it would be a good idea to find out which of the two stages (buffer or power stage) is guilty for the DC offset. For this I would suggest to desolder the 22uF interstage coupling capacitors (or the straps which replace them depending on version), and then turn on and measure outputs of both stages.
Hi,
Yeah and depending on your version or modifications it may be useful to ground the inputs and double check the output as well, it might be amplifying a DC offset, though it would have to be an unacceptably ugly offset to begin with to get 14volts out of it. I kind of dont' think you'd have a blown fet since your rail voltages would be higher than 14V right, unless you hooked it up wrong and put ground as one rail, instead of +30/-30 like you should have, could you have hooked it up as +30/0? triple check your supply rails, this makes the most sense as you didn't say the light was flashing or anything, then again, your rails are higher than 30, I'm just stabbing the dark 🙂
Maybe just for kicks you could put an ohmmeter across your output fets and make sure none measure 0 ohms. Do that with the power disconnected though so you can't short anything out. I agree with Peranders too your english is excellent.
Keep us posted you've peaked our interest.
Yeah and depending on your version or modifications it may be useful to ground the inputs and double check the output as well, it might be amplifying a DC offset, though it would have to be an unacceptably ugly offset to begin with to get 14volts out of it. I kind of dont' think you'd have a blown fet since your rail voltages would be higher than 14V right, unless you hooked it up wrong and put ground as one rail, instead of +30/-30 like you should have, could you have hooked it up as +30/0? triple check your supply rails, this makes the most sense as you didn't say the light was flashing or anything, then again, your rails are higher than 30, I'm just stabbing the dark 🙂
Maybe just for kicks you could put an ohmmeter across your output fets and make sure none measure 0 ohms. Do that with the power disconnected though so you can't short anything out. I agree with Peranders too your english is excellent.
Keep us posted you've peaked our interest.
Acme has tested and built ICE, Tripath and Hypex.
http://www.hififorum.nu/forum/topic.asp?TOPIC_ID=34605&SearchTerms=,hypex
He and his brother (=brorsan) have reviewed the UcD180 and the other amps.
The brother of ACME, brorsan (brother in swedish):
I can find lot's of warmth but at the same time a very distinct and clear sound. It sounds good , simply. Transients are well taken care of, even though I can hear some "släp" (something which lingers on, delays... etc). The bass has lot's of good power and is controlled beautifully. Voices are painted up naturally and sounds very good. The upper range has no faults, no remarks what so ever.. In short: Everything fits, is there.
ACME:
I agree in everything... almost. I couldn't hear any "släp" at all! As a conclusion ICE was the best performing module in this test. The music is reproduced better than in the Tripath and Hypex. The treble reproduction is at least as good as the Tripath
Tripath:
Brorsan:
The sound from this module was the most clearest and best of all three. There is no signs of darkning, blurring. The amp delivers transient rich music with an enormous "clip" (don't know what he means, klipp is cut?). Fast attacks and a good ability to withstand. There is lot's of power to take care of the bass. Voices are uncoloured and very natural. In the high range the amp really showing it's real face. It feel almost that something is beyong 20kHz which makes the treble crispy and clear.
ACME: Agrees...possibly the transient repoructions was a bit hold back compared to ICE. Much more natural than Hypex,. Bass in class with ICE.
Hypex:
After some time of listening there are mixed feelings about Hypex.
Brorsan:
I got kind of disappointed. Possibly influenced of all positive impressions form those who have built UcD amps. Due to that my expectations were pretty high, but it is something that doesn't feel right. It's like there is some kind of haze over the sound and in the same time I can't sense any warmth. Transient rich music lingers on in the attack and gets behind. The amp can't control the bass and sound very lame. Maybe this is caused by the fact that this is the weakest amp amongst the three, only 180 watts/channel.
The mids are blurry and the vocals sounds totally different compared to the other modules. the treble lacks of dimension and sounds very chopped off in the very highest freqeuncy range.
ACME: Sometimes you get puzzled of what you hear. Personally I think Hypex deserves better than my brother's brutal-rejection. I feel that Hypex is almost in the same level as ICE and Tripath but Hypex has some weird behavoir when it comes to handle transients. I have some trouble to pin point exactly what it is but it seems that the module wants to over-emphasize musical impacts. After a couple of swaps back and forth, I think ICE is a bit better, sounds more correct. The transient reproduction of Hypex reminds me a little of "loudness effect" but instead of sonics more transientwice. Impressing to begin with but tiring out in the long run.
Don't laugh at me becasue translating text which is about emotions is really hard but I'll hope you will get spirit of what they are saying.
http://www.hififorum.nu/forum/topic.asp?TOPIC_ID=34605&SearchTerms=,hypex
He and his brother (=brorsan) have reviewed the UcD180 and the other amps.
ICE-power:
The brother of ACME, brorsan (brother in swedish):
I can find lot's of warmth but at the same time a very distinct and clear sound. It sounds good , simply. Transients are well taken care of, even though I can hear some "släp" (something which lingers on, delays... etc). The bass has lot's of good power and is controlled beautifully. Voices are painted up naturally and sounds very good. The upper range has no faults, no remarks what so ever.. In short: Everything fits, is there.
ACME:
I agree in everything... almost. I couldn't hear any "släp" at all! As a conclusion ICE was the best performing module in this test. The music is reproduced better than in the Tripath and Hypex. The treble reproduction is at least as good as the Tripath
Tripath:
Brorsan:
The sound from this module was the most clearest and best of all three. There is no signs of darkning, blurring. The amp delivers transient rich music with an enormous "clip" (don't know what he means, klipp is cut?). Fast attacks and a good ability to withstand. There is lot's of power to take care of the bass. Voices are uncoloured and very natural. In the high range the amp really showing it's real face. It feel almost that something is beyong 20kHz which makes the treble crispy and clear.
ACME: Agrees...possibly the transient repoructions was a bit hold back compared to ICE. Much more natural than Hypex,. Bass in class with ICE.
Hypex:
After some time of listening there are mixed feelings about Hypex.
Brorsan:
I got kind of disappointed. Possibly influenced of all positive impressions form those who have built UcD amps. Due to that my expectations were pretty high, but it is something that doesn't feel right. It's like there is some kind of haze over the sound and in the same time I can't sense any warmth. Transient rich music lingers on in the attack and gets behind. The amp can't control the bass and sound very lame. Maybe this is caused by the fact that this is the weakest amp amongst the three, only 180 watts/channel.
The mids are blurry and the vocals sounds totally different compared to the other modules. the treble lacks of dimension and sounds very chopped off in the very highest freqeuncy range.
ACME: Sometimes you get puzzled of what you hear. Personally I think Hypex deserves better than my brother's brutal-rejection. I feel that Hypex is almost in the same level as ICE and Tripath but Hypex has some weird behavoir when it comes to handle transients. I have some trouble to pin point exactly what it is but it seems that the module wants to over-emphasize musical impacts. After a couple of swaps back and forth, I think ICE is a bit better, sounds more correct. The transient reproduction of Hypex reminds me a little of "loudness effect" but instead of sonics more transientwice. Impressing to begin with but tiring out in the long run.
Don't laugh at me becasue translating text which is about emotions is really hard but I'll hope you will get spirit of what they are saying.
Hej Peranders
Who are these guys???
I haven't got time to translate either. Even though it is written in Sweedish i get 95% of what they say, but I do NOT agree with their findings!!
😕
Koldby
Who are these guys???
I haven't got time to translate either. Even though it is written in Sweedish i get 95% of what they say, but I do NOT agree with their findings!!
😕 Koldby
koldby said:Hej Peranders
Who are these guys???
I haven't got time to translate either. Even though it is written in Sweedish i get 95% of what they say, but I do NOT agree with their findings!!
Koldby
Hi,
For non-swedish readers like most of us, can you please let us know roughly what's the point ?
Thanks
Tripath is the best and UcD not so good... but don't forget in combination with their speakers... and.. their taste.
If I'll get the time I will translate the review for you.
More UcD goddies here:
http://www.hififorum.nu/forum/topic.asp?whichpage=5&TOPIC_ID=32073&
If I'll get the time I will translate the review for you.
More UcD goddies here:
http://www.hififorum.nu/forum/topic.asp?whichpage=5&TOPIC_ID=32073&
From what I could understand of a web-translation I would bet it's the sound of the op amp used on the UcD180 which they dislike, wonder how they might rate a UcD400 with the op amp upgrade... Also wondering how scientific their tests were, did they listen to them all at the exact same SPL, for instance.
All the same, you have to take a review like that for what it's worth, very little. Doesn't hurt anything at all unless you run out and order a few thousand Tripath amps, and no one will do that based on someone elses review.
Peranders I might have missed a few posts, but did you wind up trying out a module yet? If so I'd be interested in knowing what you think of it, I would think your reference would be other, non class d type of amps, would be intriguing.
Thanks
All the same, you have to take a review like that for what it's worth, very little. Doesn't hurt anything at all unless you run out and order a few thousand Tripath amps, and no one will do that based on someone elses review.
Peranders I might have missed a few posts, but did you wind up trying out a module yet? If so I'd be interested in knowing what you think of it, I would think your reference would be other, non class d type of amps, would be intriguing.
Thanks
I was very interested in a UcD400 and I have also a "group buy" for all around Göteborg but I think I'll wait, both of time and money reasons.
Regardless of ACME's review I'm very interested in the UcD400 modules.
Regardless of ACME's review I'm very interested in the UcD400 modules.
Yes, I've had dreams about it, but I as well, am waiting. I now have a hard drive to replace I didn't plan for either, I lost everything. Only thing that makes it bearable is that I posted the circuits I spent so much time on so they at least are not lost.
I also fear what they'd stick me with at customs for a few modules.
I also fear what they'd stick me with at customs for a few modules.
Hello,
Bruno is EXTREMELY busy with his job and his private company (www.grimmaudio.com), so sadly he has no time yet to post answerings on the Forum. I hope everybody can respect this, perhaps in future he can find again some time.
But........
He gave me this reaction as a small comment on the test of the Swedish guys;
😀 😀 😀
Regards,
Jan-Peter
Bruno is EXTREMELY busy with his job and his private company (www.grimmaudio.com), so sadly he has no time yet to post answerings on the Forum. I hope everybody can respect this, perhaps in future he can find again some time.
But........
He gave me this reaction as a small comment on the test of the Swedish guys;
😀 😀 😀
Regards,
Jan-Peter
http://www.diyaudio.com/forums/showthread.php?postid=518481#post518481
The translation is finished and I did it as good as I could.
ACME and his brother's review is the only one which don't floats on
but the average opinion is pretty good so all that bad can't the UcD180 be. I wonder what have happened if they had used other speakers?
The translation is finished and I did it as good as I could.
ACME and his brother's review is the only one which don't floats on
but the average opinion is pretty good so all that bad can't the UcD180 be. I wonder what have happened if they had used other speakers?Hi
Laugh? Never, more like, thanks for your time and effort, job well done! I'm sure we all appreciate the difficulties, and believe me, that was faaaar more understandable (X100000) than a web translation could ever hope to be.
It kind of does seem like something was amiss with thier UcD module implementation, doesn't it? Exactly what, I coulnd't say. Due keep us posted should they decide to retry it with a UcD400 🙂
I don't think anyone will be cancelling their orders anytime soon based on their review anyway, to be honest.
Thanks again.
Laugh? Never, more like, thanks for your time and effort, job well done! I'm sure we all appreciate the difficulties, and believe me, that was faaaar more understandable (X100000) than a web translation could ever hope to be.
It kind of does seem like something was amiss with thier UcD module implementation, doesn't it? Exactly what, I coulnd't say. Due keep us posted should they decide to retry it with a UcD400 🙂
I don't think anyone will be cancelling their orders anytime soon based on their review anyway, to be honest.
Thanks again.
Peranders
Thanks for your translating. I am born in Sweden (Lidköping, and my mother is Swedish), but sadly I have forgotten my motherlanguage, because when I was 6 years old we moved to the Netherlands and start to learn Dutch......
Can you tell me something more about the materials they use for the acoustical test like preamp, loudspeakers etc....?
Perhaps they have to get used to the different sound of an amplifier with constant loop gain, what has the same fingerprint (sonic spoken) as a tube amplifier.
The UcD has a complete flat THD versus Frequency curve whereby the ICE and Tripath rizes quit fast above 1kHz. And not to forget the Tripath doesn't have at all a pre filter feedback. So the Tripath can't compensate the outputfilter.
Regards,
Jan-Peter
Thanks for your translating. I am born in Sweden (Lidköping, and my mother is Swedish), but sadly I have forgotten my motherlanguage, because when I was 6 years old we moved to the Netherlands and start to learn Dutch......
Can you tell me something more about the materials they use for the acoustical test like preamp, loudspeakers etc....?
Perhaps they have to get used to the different sound of an amplifier with constant loop gain, what has the same fingerprint (sonic spoken) as a tube amplifier.
The UcD has a complete flat THD versus Frequency curve whereby the ICE and Tripath rizes quit fast above 1kHz. And not to forget the Tripath doesn't have at all a pre filter feedback. So the Tripath can't compensate the outputfilter.
Regards,
Jan-Peter
Your name is very swedish but quite unusual.
I recommend that you search in hififorum.nu and if you find something interesting, point that out and I can help or you could register yourself there and write in english, 99% of all members speaks english.
http://www.hififorum.nu is the best forum in Sweden.... just so you know.....
I recommend that you search in hififorum.nu and if you find something interesting, point that out and I can help or you could register yourself there and write in english, 99% of all members speaks english.
http://www.hififorum.nu is the best forum in Sweden.... just so you know.....