No, not yet, still getting to setting up a dedicated noise measurements bench with big battery supplies, perfect grounding etc in my steel shed......really lousy radio/phone reception.
I intend to try measuring Bybee and much other stuff including my own filter.
I have had very interesting success lately with treating power and signal of PA and backline on a pub 3kW system.
Crowd are reporting to band and promoter of much improved and impressive sound over the past couple of shows.
Bass player experienced his bass rig treated for the first time last week......by his fourth note he stopped and exclaimed WTF.........pleasurably !.
The drummer reports now hearing bass sound directly and clearly, and removed bass feed to his monitors.
Sound engineer is enthusiastically impressed also......makes his job easier !.
The trick is reducing system excess noise without leaving/causing signature...Mr Bybee hasn't quite achieved that IMHO.
Dan.
You don't have a clue about modern design and layout practices... I'll rephrase this, also PCB materials, removing heat from a device using boards as heat spreaders etc. Apart from a few PTH resistors that mount to heatsinks you basically have a resistor floating in air, whereas with an SMD device (and there are many types of packages) you have a component in intimate contact with both a metal surface (the copper) but also a PCB where with the right deign you can control and remove heat far more effectively than a blob floating in air relying on convection currents to remove the heat, which in a sealed (or limited air flow) case is not so easily done. There is a wealth of info out there, on the Blowtorch thread I posted links to new thermal PCB materials, over the last 15 odd years much work has been done on thermal packages and design for bottom terminated components (IPC_7093), new work has been done on current carrying capacity of routes and how copper planes influence the removal of heat (IPC-2152) and with the advent of high power LED's we have another source of information and research by the likes of Cree on thermal engineering at a PCB level. So surprise though it may be to cutting edge audio using PTH components the rest of electronics is moving forward and developing so instead of looking to the past (30 year old papers anyone) look to the present and the future.....
I may be amateur but I do get to do exciting layouts such as the boards I am doing for the NGNPP project, of course no where near as complex as Audio design...😉
Current is is the number of jiggling electrons (charge carriers) that pass a certain point in a fixed amount of time....
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Congratulation to JC and Max for derailing what was almost a sensible discussion regarding reality with the usual unproven true believer BS on materials and Bybees...
If there are differences they should be easy to measure...
I am working here next week...
https://www.shimadzu.co.uk/
I shall ask some of the guys there about the Bybees and similar stuff, I do remember one reaction once at the Pub Christmas before last... trouble is its not really polite enough for a public forum.
In fact thinking about some of the golden ears brigade's claims its like the claims down the pub... Oh I can drink 8 pints easily... one upmanship.
With the Bybees you have yet to present any sound evidence or reasonable explanation of what is going on, both this device and your super duper device Max would be hailed as saviours in the real world of electronics where we struggle to combat noise using recognised techniques and engineering practices....
If there are differences they should be easy to measure...
I am working here next week...
https://www.shimadzu.co.uk/
I shall ask some of the guys there about the Bybees and similar stuff, I do remember one reaction once at the Pub Christmas before last... trouble is its not really polite enough for a public forum.
In fact thinking about some of the golden ears brigade's claims its like the claims down the pub... Oh I can drink 8 pints easily... one upmanship.
With the Bybees you have yet to present any sound evidence or reasonable explanation of what is going on, both this device and your super duper device Max would be hailed as saviours in the real world of electronics where we struggle to combat noise using recognised techniques and engineering practices....
EMC test set up will help you set up a measurement set up, though what you are going to find I don't know...
Nice to see we have gone from the:
Wife in the kitchen...
The singer in a rock'n'roll band...
To the...
The audience in the stadium (not one an audiophile)....
Anyway before all the audiophoolery crept in we were discussing resistor parasitics and how much effect they would actually have (real effects not imagined) at Audio frequencies, I would still be interested in others views on this.
Maybe we should remove noise from one cm silver wire or copper wire???.
The problem is that you can find plenty of other explanations for sound differences.
However, there are differences in sound back where "martriale sound" will be the most natural explanation.
I can build the same amplifier circuit, but with different choices of components,
One version can I get to sound like High-end and the other really bad.
As I mentioned in a previous round, it is not only resistors that have sound differences sound differences, it applies to all passive components.
I have tested this with blind test with about twenty experienced hifi entuister. and I have no doubt there is something about this.
it is a natural explanation for the large differences in hi-fi, as opposed to image reproduction
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I would expect the plating on the smd resistor end caps and the thickness of the copper to raise the smd resistor above the board.
Most smd transistors and ICs have the legs preformed to "lift" the devices off the PCB.
It's that gap that can be partially filled with flux and dross that gives problems if cleaning is not done thoroughly.
SMD are floating in air just like through hole resistors.
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I use Bybees all through my hi fi system, I am a believer. With all the criticism here, I have thought over my opinions that I have gained over the decades. Yep, Bybees work on both audio and video, but the effect is more subtle than many audio improvements, so only serious hi enders should apply them. They are expensive too.
I have compared CTC Blowtorch amps made with copper wire and silver respectively. Silver sounds more clear, but unforgiving. Copper is more forgiving, and probably the best choice for most people. I always use the best copper or silver that I can find to compare. The VDH carbon is interesting, but I don't have any to compare and it is virtually impossible to terminate.
When I purchased the Stanford Research SR-1, I thought that I might find even more about Bybees, wire, and amp distortion. Sort of a disappointment in that way. It is just too noisy to be completely useful, although noise averaging is pretty nice for amp and preamp distortion measurements. Noise averaging would be useless for evaluating the Bybee, or wire. Oh well.
I have compared CTC Blowtorch amps made with copper wire and silver respectively. Silver sounds more clear, but unforgiving. Copper is more forgiving, and probably the best choice for most people. I always use the best copper or silver that I can find to compare. The VDH carbon is interesting, but I don't have any to compare and it is virtually impossible to terminate.
When I purchased the Stanford Research SR-1, I thought that I might find even more about Bybees, wire, and amp distortion. Sort of a disappointment in that way. It is just too noisy to be completely useful, although noise averaging is pretty nice for amp and preamp distortion measurements. Noise averaging would be useless for evaluating the Bybee, or wire. Oh well.
Haha, we'll see who laughs longest. Stadiums and outdoor festivals have been well done already, this round of fun is in a pub.
Mature audience who know the sound of the band and sound of the venue have commented, and without any clue of what is happening behind the scenes.
I want to look at long term noise spectrums of pcb components, system stages and complete systems with and without excitation signal.
Scott has promised some opamps to use in a bridge measurement jig.
Marce, your advices on bench construction, earthing, shielding, layout, jig layout/implementation would be much appreciated.
The little diversion is not all audiophoolery.
Resistor excess noise modulated according to series current is one behaviour I seek to measure.
Good luck with the new job....some serious and interesting gear there.
Dan.
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Certain mixtures of materials impart certain signatures and other filtering effects.
When the bass player and drummer both remark about feeling a difference, the sighted evaluation argument goes out the window, sorry about that.
Back to the resistor noise discussion, how does RF/EMI signal on top of the audio signal influence resistor audible excess noise production.
There was remark about the first loading resistor in RIAA preamps causing different audible behaviours.
Dan.
Well, which mixtures? The ones used in ca. 1929 radios, or the ones used in Y2K good quality audio gear? Or the ones dreamt up by tweekers?
I'm familiar with that brand of religious belief as applied to good modern gear, and have many times witnessed its utter breakdown when tested with anything like scientific rigor.
Hence the summary opinion: "Sighted Evaluation". If you ain't done good DBTs, they are easy to disbelieve.
Me also. The difference was not subtle and would pass blind testing reliably.
Back to resistor discussion.
Dan.
Marce,
I don't know how you read what I wrote so backwards. Pretty sure you have looked at thermal images of PC boards and seen the dramatic differences between leaded and surface mount components. I don't have one handy to post or everyone could see why I said the comparison is silly. What to me is new are some of the larger leaded resistors that have very low power ratings.
Scott,
Let's take another stab at communicating.
If I have a 1 meter long piece of wire and inject a single charge into one end then at T=0 there will be a very small excess charge of 1/6.2e18 Coulomb. At T = 1/(.8xC) charge will come out the other end. Not the same electron. So after some very small period of time the balance will be restored.
I don't know how you read what I wrote so backwards. Pretty sure you have looked at thermal images of PC boards and seen the dramatic differences between leaded and surface mount components. I don't have one handy to post or everyone could see why I said the comparison is silly. What to me is new are some of the larger leaded resistors that have very low power ratings.
Scott,
Let's take another stab at communicating.
If I have a 1 meter long piece of wire and inject a single charge into one end then at T=0 there will be a very small excess charge of 1/6.2e18 Coulomb. At T = 1/(.8xC) charge will come out the other end. Not the same electron. So after some very small period of time the balance will be restored.
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