Jimmy used to do a bit of a write up in one of the Hi-fi mags, I'm sure he once said he uses the speakers with the drive units faced at the back wall😀
Hi Rick,
You are maintaining a ground to the core, right?
I think the placebo effect has been magnified where ever it is that you live. Please keep in mind the safety issues no mater what silly thing you do. I personally don't care what you suggest as long as it makes you happy and you do not endanger anyone's life with your advice.
Green tape on the bottom of your chassis may tighten up the bass. 🙄
-Chris
You are maintaining a ground to the core, right?
I think the placebo effect has been magnified where ever it is that you live. Please keep in mind the safety issues no mater what silly thing you do. I personally don't care what you suggest as long as it makes you happy and you do not endanger anyone's life with your advice.
Green tape on the bottom of your chassis may tighten up the bass. 🙄
-Chris
Gain adjustment UCD400 V6.1
Hello,
I am trying to adjust the gain of the UCD400 moduls (version V6.1), but the application note from Hypex seems to be outdated.
I measured R59 1.2KOhm and R60(?, can't really read it) 1.2 kOhm also.
Can somebody answer the following questions please:
Rf: Value and resistor number?
Rg: Value and resistor number?
What is R59 and R60?
Is the gain formula in the application note still correct?
Thanks,
Matthias
Hello,
I am trying to adjust the gain of the UCD400 moduls (version V6.1), but the application note from Hypex seems to be outdated.
I measured R59 1.2KOhm and R60(?, can't really read it) 1.2 kOhm also.
Can somebody answer the following questions please:
Rf: Value and resistor number?
Rg: Value and resistor number?
What is R59 and R60?
Is the gain formula in the application note still correct?
Thanks,
Matthias
Ric?
I'm going to be REALLY blunt with you this time ...
You have to be kidding right, better sound? I thought we'd seen the last of you after our discussion on how a heatsink can influence the sound of an amplifier (it doesn't, period). The discussion was bordering on ridiculous then, but after seeing the pictures of the amplifier you have for sale I can't stop myself from posting ... to warn others to NOT try your suggestions.
If I look at the pictures of the amplifier you built I can't help but wonder how you figured out what end of a soldering iron to use?C'mon take it from an engineer that the ideas you propose are just absurd, much like the heatsink idea you came up with, and show one thing and one thing alone, you don't have a clue how an amplifier works, let alone a class-D amplifier.
Seriously, you're a bad influence, freedom of speech is a good thing, but suggesting that people try these is just absurd.
Best regards,
Sander Sassen
http://www.hardwareanalysis.com
I'm going to be REALLY blunt with you this time ...
You have to be kidding right, better sound? I thought we'd seen the last of you after our discussion on how a heatsink can influence the sound of an amplifier (it doesn't, period). The discussion was bordering on ridiculous then, but after seeing the pictures of the amplifier you have for sale I can't stop myself from posting ... to warn others to NOT try your suggestions.
If I look at the pictures of the amplifier you built I can't help but wonder how you figured out what end of a soldering iron to use?C'mon take it from an engineer that the ideas you propose are just absurd, much like the heatsink idea you came up with, and show one thing and one thing alone, you don't have a clue how an amplifier works, let alone a class-D amplifier.
Seriously, you're a bad influence, freedom of speech is a good thing, but suggesting that people try these is just absurd.
Best regards,
Sander Sassen
http://www.hardwareanalysis.com
I have no intention of trying that stuff out but thank you for the warning Sander!
I'm still a little concerned about that hand wound output coil in the picture🙄
Also where is the mains switch? I can see small toggle switch I presume is for the input section
I'm still a little concerned about that hand wound output coil in the picture🙄
Also where is the mains switch? I can see small toggle switch I presume is for the input section
oh well
Sasser,
It is so fascinating that the majority of people who post here do not do listening tests........instead they try to find the one post every five years in some magazine that tried a double blind test and concluded that everything sounds the same! There are literally hundreds of posts every day on various forums, emags and written mags....some here too!!!! that describe differences in material sound, wire sound, damping sound, solder sound, resistor sound (check out Peter Daniels posts here, for instance, he talks about how mounting a chip amp to aluminum does not sound as good as brass/bronze).....I hope you don't bother him....he is busy doing listening...nice guy too. We are not the only ones who hear these things. Because you "flat earthers" are so boisterous and noisey here you scare away the people who listen because they don't want to be put down by you. Believe what you want, but to call what I do crazy and then think you are an audiophile and yet refuse to listen to anything, is really nuts! As I said, engineering is where is starts.....then you need to do listening tests to take it to the next level.....if you don't believe this fine.....but why do you insist that you own this forum and when someone like me who listens to things says try this or that you have to chime in and act like you know everything and put the person down. You guys are really in the minority in the audiophile community.....the vast majority of audiophiles actually listen to wires, damping pucks, AC line conditioners, etc. They hear a difference.....there are reviews all over the net describing things that you think are simply Placebo effects or whatever......The earth really is not flat! But to really know this you have to take a picture from space.....ie, get a higher perspective.....as long as you think it is all capacitance, inductance and resistance and nothing else matters then your perspective is of a child....really....to grow up means to look at things differently and try things you never would have thought of. There are lots of posts on the Cable Asylum where someone says "I used to believe cables were a bunch of snake oil.....especially power cords"....but then I tried xbrand cable and it sounded different....yes, better". Posts like these happen every week on that forum.....try to find one there (and I am sure you will...you can always find something to back your opinion) that says "I used to believe that cables sounded different and some sounded better than others but now I don't hear any difference and I think you should just use zip cord from the hardware store." You text book thumping non believers are no different from religious zealots who believe that the other guys are the "devil". Fortunately, you guys don't shoot each other....but your violence (arrogance and I know what is real...heaviness) literally is a brick you throw at people to show just how smart you are....but, in fact, it shows your ignorance, cowardice and childishness. For your information, just last night I damped the heatsinks on a new amp I am designing....it already had one piece of damping material across the ribs on the bottom when installed but putting another piece on the top made the sound much more real.....you are just plain wrong.....damping heatsinks makes better sound, no doubt. But, of course, you will not try this, instead you will just say it is Voodoo and dismiss it as usual with your Pomp *** arrogance.....he he....just being blunt....like you. This is my last post in reply to anything Mr. Sasser will ever say about what I hear. So, flame on. However, I will continue to post whenever I feel like it about sound differences that are easy for people to try.....as I said, even one person who benefits from my listening tests is nice. I just wish you flat earthers could just leave the subjective opinions lie and not have to post each time like some kind of "audio police, judge and jury". You will grow up in time, we all do....I wish all of you all the best....really
Sasser,
It is so fascinating that the majority of people who post here do not do listening tests........instead they try to find the one post every five years in some magazine that tried a double blind test and concluded that everything sounds the same! There are literally hundreds of posts every day on various forums, emags and written mags....some here too!!!! that describe differences in material sound, wire sound, damping sound, solder sound, resistor sound (check out Peter Daniels posts here, for instance, he talks about how mounting a chip amp to aluminum does not sound as good as brass/bronze).....I hope you don't bother him....he is busy doing listening...nice guy too. We are not the only ones who hear these things. Because you "flat earthers" are so boisterous and noisey here you scare away the people who listen because they don't want to be put down by you. Believe what you want, but to call what I do crazy and then think you are an audiophile and yet refuse to listen to anything, is really nuts! As I said, engineering is where is starts.....then you need to do listening tests to take it to the next level.....if you don't believe this fine.....but why do you insist that you own this forum and when someone like me who listens to things says try this or that you have to chime in and act like you know everything and put the person down. You guys are really in the minority in the audiophile community.....the vast majority of audiophiles actually listen to wires, damping pucks, AC line conditioners, etc. They hear a difference.....there are reviews all over the net describing things that you think are simply Placebo effects or whatever......The earth really is not flat! But to really know this you have to take a picture from space.....ie, get a higher perspective.....as long as you think it is all capacitance, inductance and resistance and nothing else matters then your perspective is of a child....really....to grow up means to look at things differently and try things you never would have thought of. There are lots of posts on the Cable Asylum where someone says "I used to believe cables were a bunch of snake oil.....especially power cords"....but then I tried xbrand cable and it sounded different....yes, better". Posts like these happen every week on that forum.....try to find one there (and I am sure you will...you can always find something to back your opinion) that says "I used to believe that cables sounded different and some sounded better than others but now I don't hear any difference and I think you should just use zip cord from the hardware store." You text book thumping non believers are no different from religious zealots who believe that the other guys are the "devil". Fortunately, you guys don't shoot each other....but your violence (arrogance and I know what is real...heaviness) literally is a brick you throw at people to show just how smart you are....but, in fact, it shows your ignorance, cowardice and childishness. For your information, just last night I damped the heatsinks on a new amp I am designing....it already had one piece of damping material across the ribs on the bottom when installed but putting another piece on the top made the sound much more real.....you are just plain wrong.....damping heatsinks makes better sound, no doubt. But, of course, you will not try this, instead you will just say it is Voodoo and dismiss it as usual with your Pomp *** arrogance.....he he....just being blunt....like you. This is my last post in reply to anything Mr. Sasser will ever say about what I hear. So, flame on. However, I will continue to post whenever I feel like it about sound differences that are easy for people to try.....as I said, even one person who benefits from my listening tests is nice. I just wish you flat earthers could just leave the subjective opinions lie and not have to post each time like some kind of "audio police, judge and jury". You will grow up in time, we all do....I wish all of you all the best....really
Hey Ric,
Sorry, but almost everyone here does listening tests. You just sold your target audience short.
I guess you are the one true god in your mind. You've also been very insulting to those I know do a good job.
I wasn't going to mention what I thought off the amp you built. Given your stated expertise, I would expect at least a PCB, not perf board. A person of your supposed intelligence could also design the tests to prove everyone wrong. Nope. Nada. No repeatable evidence of any kind. At least many others are looking at real issues and trying to test for things some of us can hear consistantly.
Now would be a good time to recenter yourself, recharge your crystals and have another look at the field.
-Chris
Sorry, but almost everyone here does listening tests. You just sold your target audience short.
I guess you are the one true god in your mind. You've also been very insulting to those I know do a good job.
I wasn't going to mention what I thought off the amp you built. Given your stated expertise, I would expect at least a PCB, not perf board. A person of your supposed intelligence could also design the tests to prove everyone wrong. Nope. Nada. No repeatable evidence of any kind. At least many others are looking at real issues and trying to test for things some of us can hear consistantly.
Now would be a good time to recenter yourself, recharge your crystals and have another look at the field.
-Chris
OK
Well, your are probably right about listening tests....but not at a very involved level. There is a level of involvement that is generally not done here.....Of course, this is my perspective, having done hundreds of listening tests throughout the years. When I first got into this in the late 70s and did constant listening tests on wire, etc. I thought everyone else was doing the same thing....then realized that I was kind of alone.....however, since then thousands and thousands of people worldwide are doing more subtle listening tests.....the majority here are not. You do listen....but damp your heatsinks?.....remove LEDs.....remove the steel from diode bridges and trannies.....damp other parts....just too dang freakin far out for most of the engineer types here that dominate these pages. Last time Sasser, etc. blasted me I got three emails from people saying that they will not post on this forum anymore for fear of getting blasted.....is this what you guys want?
So what is wrong with a perf board? Super low capacitance, super short signal path...you can use exotic wire....most of us tweakers would say that it probably would sound better....but to you engineers...you have to have a circuit board? This somehow makes it professional and real for you? Many, many high end companies brag about how they hardwire all the components together to get the best sound...but here the "rule" is that you have to use a circuit board to be taken "seriously"? I have designed and sold DACs that used circuitboards (designed by me...yes, they worked good too)....with the new smaller chips you have to use circuit boards.....no way can you solder to those small chips. But with larger parts....the need for circuit boards is nyet.....however, it sure makes assembly many many times faster to have a circuit board and in some cases can make a circuit more stable....(digital circuits, where ground planes and multilayering makes sense).
There are no "objective" tests that can prove whether damping a heatsink or removing an LED makes a difference in sound. Any intelligent person can understand this. You must listen....and I don't mean double blind tests. When you can trust your own God given measurement tool (your ears) then you will "know" whether something makes a difference or not.....you have to be willing to listen....to have an open mind and in many of your cases...be wrong....be very wrong. The ego wants to be right.....that is its game...the heart wants to know.....it wants to experience all that there is....you have to trust your heart.....sort of like asking someone......"how do you know your in love"......well....your heart knows......in the case of audio....your ears know. trust your ears.
I have posted this true story before but I will post it again for it underscores the problem:
There is a man who does not believe wires sound different....he believes amps sound different, but not wires....he has been adamant about this for at least 25 years. He finds a new budding audio buddy and tells the audio buddy of his opinion......they are both invited to my friends house who has highly modified Soundlab electrostats....along with another friend....so four of them are there and the other guy who came wants to A/B an interconnect with another one.....the non-believer....simply goes into the kitchen....so he won't have to be a part of this "nonsense".....all three of the other guys hear a difference in the cables and agree on the difference (including the new guy who had been told that cables sounded the same, fortunately for him he did not have 25 years of "being right" to defend). The non believer still does not believe that cables sound different.....the open minded beginner heard a difference that was confirmed by the other two people in the room.....now...who is more wise? The head in the hole old ostrich or the open minded beginner?
Well, your are probably right about listening tests....but not at a very involved level. There is a level of involvement that is generally not done here.....Of course, this is my perspective, having done hundreds of listening tests throughout the years. When I first got into this in the late 70s and did constant listening tests on wire, etc. I thought everyone else was doing the same thing....then realized that I was kind of alone.....however, since then thousands and thousands of people worldwide are doing more subtle listening tests.....the majority here are not. You do listen....but damp your heatsinks?.....remove LEDs.....remove the steel from diode bridges and trannies.....damp other parts....just too dang freakin far out for most of the engineer types here that dominate these pages. Last time Sasser, etc. blasted me I got three emails from people saying that they will not post on this forum anymore for fear of getting blasted.....is this what you guys want?
So what is wrong with a perf board? Super low capacitance, super short signal path...you can use exotic wire....most of us tweakers would say that it probably would sound better....but to you engineers...you have to have a circuit board? This somehow makes it professional and real for you? Many, many high end companies brag about how they hardwire all the components together to get the best sound...but here the "rule" is that you have to use a circuit board to be taken "seriously"? I have designed and sold DACs that used circuitboards (designed by me...yes, they worked good too)....with the new smaller chips you have to use circuit boards.....no way can you solder to those small chips. But with larger parts....the need for circuit boards is nyet.....however, it sure makes assembly many many times faster to have a circuit board and in some cases can make a circuit more stable....(digital circuits, where ground planes and multilayering makes sense).
There are no "objective" tests that can prove whether damping a heatsink or removing an LED makes a difference in sound. Any intelligent person can understand this. You must listen....and I don't mean double blind tests. When you can trust your own God given measurement tool (your ears) then you will "know" whether something makes a difference or not.....you have to be willing to listen....to have an open mind and in many of your cases...be wrong....be very wrong. The ego wants to be right.....that is its game...the heart wants to know.....it wants to experience all that there is....you have to trust your heart.....sort of like asking someone......"how do you know your in love"......well....your heart knows......in the case of audio....your ears know. trust your ears.
I have posted this true story before but I will post it again for it underscores the problem:
There is a man who does not believe wires sound different....he believes amps sound different, but not wires....he has been adamant about this for at least 25 years. He finds a new budding audio buddy and tells the audio buddy of his opinion......they are both invited to my friends house who has highly modified Soundlab electrostats....along with another friend....so four of them are there and the other guy who came wants to A/B an interconnect with another one.....the non-believer....simply goes into the kitchen....so he won't have to be a part of this "nonsense".....all three of the other guys hear a difference in the cables and agree on the difference (including the new guy who had been told that cables sounded the same, fortunately for him he did not have 25 years of "being right" to defend). The non believer still does not believe that cables sound different.....the open minded beginner heard a difference that was confirmed by the other two people in the room.....now...who is more wise? The head in the hole old ostrich or the open minded beginner?
Ric,
I'd be happy to debunk some of your 'work' if your posts were at least comprehensive, used proper interpunction and adhered to the basic rules of spelling and grammar. As is I'm having a hard time trying to figure out what you're trying to get across exactly.
But perhaps that's how your mind works? That would go a long way towards explaining some of the 'bordering on lunatic' suggestions you've posted here and your handywork which I'd compliment with describing as 'chaotic'.
Maybe you can escape the lunatic fringe for just a few minutes to type up a few coherent sentences that make sense so I can give you a proper reply?
Best regards,
Sander Sassen
http://www.hardwareanalysis.com
I'd be happy to debunk some of your 'work' if your posts were at least comprehensive, used proper interpunction and adhered to the basic rules of spelling and grammar. As is I'm having a hard time trying to figure out what you're trying to get across exactly.
But perhaps that's how your mind works? That would go a long way towards explaining some of the 'bordering on lunatic' suggestions you've posted here and your handywork which I'd compliment with describing as 'chaotic'.
Maybe you can escape the lunatic fringe for just a few minutes to type up a few coherent sentences that make sense so I can give you a proper reply?
Best regards,
Sander Sassen
http://www.hardwareanalysis.com
anatech said:
It seems like Class D forum is especially sensitive to anything less ordinary and it's a pity to see that even moderators have their part in that.
I don't see any problem with perforated board. A lot of well respected manufacturers use perforated boards in there designs. Here's one such example, $4995 Placette Active preamplifier with attenuator and PS using perforated boards: http://www.10audio.com/dodd_battery_pre.htm#Placette_Active
Attachments
Peter,
What earns them the 'well respected' tag? The fact that they charge $4995 for something that looks like DIY and they get away with it?
I use perf. board for prototyping, but would never consider it for anything beyond that, for obvious reasons. But that's not my gripe with Ric' creations, as I'm sure you'll understand.
Best regards,
Sander Sassen
http://www.hardwareanalysis.com
What earns them the 'well respected' tag? The fact that they charge $4995 for something that looks like DIY and they get away with it?
I use perf. board for prototyping, but would never consider it for anything beyond that, for obvious reasons. But that's not my gripe with Ric' creations, as I'm sure you'll understand.
Best regards,
Sander Sassen
http://www.hardwareanalysis.com
SSassen said:
I would say the resale value of the product, how often the products appears on used market and how fast it sells. The one I mentioned is very good in that regard.
It is interesting that the "objective, know it all, scientist" will usually resort to putting down the grammar and punctuation in a post as last resort......really, really childish. Have we seen this before? Obviously, this person has nothing to say.....nothing can defend ignorance. Listen....you will know.....talk and you will "think" you are right....and in some environments...you will get "others" to agree.....however, this does not make it real.....does not make it truth....which is what you experience with your ears....not your dualist mind, grasping to be right. I know, this last run on sentence is just too far out for you to comprehend.....yes, the ramblings of a mad man.....he he. I wish you all this insanity....for my experience is lovely.
Hi Peter,
Now, you should know better than anyone here (me being the mod who has had a part in this) that a circuit board is used to make circuits perform in a repeatable manner. You also know that a void area can be used with only holes (again to make it repeatable) so magic wire can be used. I'll also add that very high impedance circuits often use teflon standoffs where connections are made point to point.
So, for the best construction, PCB with properly located holes using standoffs (you can use ceramic 😉 ) would sound better still and present good value to the customer. Your perf board isn't even close as I see areas where bare wire may touch some isolated copper pads. Does it make a difference? It must if the wire type does.
I will give you one thing. In very low level circuits we watch for wire connections that give rise to thermocouple effects. Guess what is most often used? Copper! 😀
I guess a background in calibration and instrumentation has be helpful to me after all. We are looking at signal levels far below what we encounter in audio sometimes, certainly errors. Snake oil doesn't fly in a cal lab or primary standards lab.
Also, your reference to a moderator is insulting. You used to be one and you know we post as members for the most part. So what is your point? My point was, and is, any modifications should maintain the integrity of the equipment for at least safeties sake.
-Chris
Now, you should know better than anyone here (me being the mod who has had a part in this) that a circuit board is used to make circuits perform in a repeatable manner. You also know that a void area can be used with only holes (again to make it repeatable) so magic wire can be used. I'll also add that very high impedance circuits often use teflon standoffs where connections are made point to point.
So, for the best construction, PCB with properly located holes using standoffs (you can use ceramic 😉 ) would sound better still and present good value to the customer. Your perf board isn't even close as I see areas where bare wire may touch some isolated copper pads. Does it make a difference? It must if the wire type does.
I will give you one thing. In very low level circuits we watch for wire connections that give rise to thermocouple effects. Guess what is most often used? Copper! 😀
I guess a background in calibration and instrumentation has be helpful to me after all. We are looking at signal levels far below what we encounter in audio sometimes, certainly errors. Snake oil doesn't fly in a cal lab or primary standards lab.
Also, your reference to a moderator is insulting. You used to be one and you know we post as members for the most part. So what is your point? My point was, and is, any modifications should maintain the integrity of the equipment for at least safeties sake.
-Chris
anatech said:
Sure they do, but are we all listening the same?
Here's an example of one, less common approach to playback evaluation: http://www.goodsoundclub.com/GetPost.aspx?PostID=50
Hi Peter,
I always refrain from listening to my own work and going forward without others commenting on it first. I am very lucky to have some friends that are bluntly honest with me. There are differences that can't easily be measured. I have been able to make circuit changes that avoid some of the poor sounding choices possible.
However, all my work also agrees with physics if I go back and look at what I've done. I may not always be able to measure things, but I do base all work in physics and good engineering practice. I'm sure you must do the same.
So what is the problem with my listening tests?
-Chris
I always refrain from listening to my own work and going forward without others commenting on it first. I am very lucky to have some friends that are bluntly honest with me. There are differences that can't easily be measured. I have been able to make circuit changes that avoid some of the poor sounding choices possible.
However, all my work also agrees with physics if I go back and look at what I've done. I may not always be able to measure things, but I do base all work in physics and good engineering practice. I'm sure you must do the same.
So what is the problem with my listening tests?
-Chris
anatech said:
When I see a moderator posting, I always see him as moderator first. What I see here is that Rick is treated like a witch at a trial, and you don't help the situation at all.
This forum used to be very tolerant to different views and opinions. It's very hard now to present anything that cannot be verified by DBT.
BTW your reference to "magic wire" is insulting as well.
Hi Peter,
Moderators are members first. We just have more work to do. When you see a cop hat you know we are being official. Next time you see one of us posting, think member first. That's why I said you should know better. I remember you as a moderator Peter. I don't have anything unkind to say to you at all. Just give us a break.
As far as being accepting of ideas, we are. But if someone is going to put forth an unsupported idea, expect some questions. What the devil is wrong with that? If the member in question starts telling us that there is no prove except what *they* hear (plus may not be safe), what do you expect the response to be?
I think you need to cut the members here some slack. If you are going to put forth an idea, at least refer to a possible chemical or physical property that may support that idea. Otherwise we are back to attempting to change lead into gold without nuclear physics.
All due respect Peter, and I mean that.
-Chris
It was, but not terribly. Did you get the importance of my further post about thermocouple effects?
Moderators are members first. We just have more work to do. When you see a cop hat you know we are being official. Next time you see one of us posting, think member first. That's why I said you should know better. I remember you as a moderator Peter. I don't have anything unkind to say to you at all. Just give us a break.
As far as being accepting of ideas, we are. But if someone is going to put forth an unsupported idea, expect some questions. What the devil is wrong with that? If the member in question starts telling us that there is no prove except what *they* hear (plus may not be safe), what do you expect the response to be?
I think you need to cut the members here some slack. If you are going to put forth an idea, at least refer to a possible chemical or physical property that may support that idea. Otherwise we are back to attempting to change lead into gold without nuclear physics.
All due respect Peter, and I mean that.
-Chris
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