I can understand and accept that.
There will always be someone with a different perception. Including myself.
It is not.
RR1220/0805
This is the one of that kind.
RR1220P-101-B-T5 - SUSUMU - Chipwiderstand, Oberflächenmontage, Dünnschicht, Baureihe RR, 100 ohm, 100 mW, ± 0.1%, 100 V | Farnell element14 Deutschland
Why don't you provide details of the resistor you removed? You must know. How else would you make a judgement call on whether changing it would be beneficial?
You could have bought better than the Susumu RR series and they're certainly not "non-magnetic".
If you like the change with the Susumu RR series, why not try their RG series, or their non-magnetic series the NRG, or even their URG series?
Just because it is MELF doesn't mean it is a poor resistor...
UMA02040G1000HAU00 Vishay / Beyschlag | Mouser
You could have bought better than the Susumu RR series and they're certainly not "non-magnetic".
If you like the change with the Susumu RR series, why not try their RG series, or their non-magnetic series the NRG, or even their URG series?
Just because it is MELF doesn't mean it is a poor resistor...
UMA02040G1000HAU00 Vishay / Beyschlag | Mouser
He removed the stock resistor that came from Hypex, the markings are often impossible to tell post installation.
You'll have to ask Bruno or Jan.
Alan
You'll have to ask Bruno or Jan.
Alan
That was just a prototype from several generations ago. Onto bigger and better things these days 🙂
Voltage gain of the UcD modules - http://www.hypex.nl/docs/appnotes/gain_appnote.pdf
Other values can be recognized by the markings but you can also measure them either.
My understanding of non-magnetic is that the resistor can not be attracted by a magnet. So at least my samples are non-magnetic.
These are the ones which I could source regarding the required size and values.
Anyway, I am fine with what I've achieved so far so no more resistor changes.
A resistor is non-magnetic when it is made of non-magnetic materials. The RR series aren't non-magnetic.
So you just decided to randomly try some different resistors. You didn't know what you were replacing and it appears you knew little about what you were replacing it with. Ok. I guess you could randomly try other things as well. Good luck with all that!
I think readers can make their own judgement calls on the level of confidence they should place in post 10436.
So you just decided to randomly try some different resistors. You didn't know what you were replacing and it appears you knew little about what you were replacing it with. Ok. I guess you could randomly try other things as well. Good luck with all that!
I think readers can make their own judgement calls on the level of confidence they should place in post 10436.
Checking the data sheets of these series of resistors, being magnetic or non-magnetis does not seem to be specified.
Are non-magnetic resistors "better sounding" by definition or are we talking "modification language" here?
Baka did some mods and apparently is happy with it; I can not judge the technical implications of the mods (who can?) but reading his posts I am rather confident with his efforts.
What's your problem SGK?
I am sure we all know the resistance value. If all you changed was the resistance value, then yes, there will be a difference in sound - the volume/gain will be different.
And did you measure them?
Have you ever come across a resistor of that size that is actually attracted by a magnet? Most small resistors, despite being magnetic, contain so little nickel that they would fail your magnet test.
Mostly the latter - all depends on if you think magnetic interference is an issue. I don't think Baka has either measured or calculated whether it is an issue or not in this circuit.
I guess the issue is that SGK (and I) are reasonably able to judge the technical implications, and that is why we are sceptical. If your point is "well, it probably doesn't do much harm, and it makes someone happy, so why not let it be", you might have a point.
Then I am waiting for your judgement on the technical implications that these mods have, and not just talk but backed up by measurements as well to give your judgement at least some ground (boy this might be a long lasting discussion....).
It is easy to be sceptical but a bit more difficult to come up with real arguments I guess.
By the way this discussion is off-topic as UCD is not Ncore; Baka better had opened a separate thread?
I think it will be a very short discussion. I am not the one claiming improvements, Baka is, and seems he is not interested in doing any measurements.
No, not really. It is trivially easy to come up with random tweaks and claim they are an improvement, as long as you don't have to provide either rationale or evidence. Unfortunately the audiophile world is full of people who prefer to believe in unicorns rather than engineering and science.
I agree.
We all want that 😀 but we seldom are able to declare a sonic improvement by measuring.
How many examples you wish? Why do audio forums exist?
Living in that world is living in fairy tale country.
Baka might be clever enough not to choose the route of measuring as that would not tell him anything.
And why the scepticism? I have built several UCD amps and would judge their sound quality being "average". Maybe a stock UCD400 sounds colored and the modifications made it sound more natural. Requires the willingness to think the other way around however 🙄
Good point. And I agree if by "audio forums" you mean audiophile forums. Professional audio forums are a diferent story. But this is "diy audio". Yes, DIY can mean random tweaks by amateurs, but it can also mean honest attempts at learning and understanding. That often means a fact-based and evidence-based approach - at least if what you want to learn is technology. Sociology and psychology are another matter... 🙂
Maybe. Maybe not. The problem is that there is no way to tell (from the information we are presented with).
You mean that understanding what you are doing doesn't really matter? 🙂
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