Besides finding a Pokemon inside my amp , any of the post"badger" designs here on the forum
are so noiseless and transparent that I wonder why any forum member would bother
"sweating" inter-connects or any other subjective material related issue that they think
would detract from their audio related experiences ?
Borrelia burgdorferi
is at my nerve endings and won't show up on a typical test.
Yeah , lyme is for the "lazy" , we have to diagnose (and even treat ourselves with
intravenous antibiotics).
Strange .... that somebody even is aware of this "ghost disease".
Same with a lot of this "ghost audio" hype.
Short of pure garbage interconnects at either my 4K HDMI or 5.1 audio
outputs , there is nothing one could either see or hear. Only an AP or CRO could
even begin to show any slight degradation with careful testing.
So , this audio "voodoo" is mostly hype. Sure ... there is a lot of economic junk
being passed on the to the typical consumer. Most of (our)the present designs
on the forum are far superior if properly built.
Here , I am "on the fence" with JC and others. Better materials will either make for "eternal" amps
and never having to be concerned with long term drift or just
to eliminate materials from the design considerations. If economics is a concern it is
even possible to create a design that can (mostly)negate things such as matching
or even lower tolerance passives.
If one then chooses to use better components with said design - WOW !
Audio is so simple ... best to leave it simple - FLAC ---> DAC --- amp/speaker.
I DO have the "fast" CFA's available to me .... "sub nano second" responses ?
Give me a break ... the air in the room is " primitive" - my slow 40v/us amps will
move that air just as fast.
Any simplifying of the source (below) is quite superior to any esoteric subjective
gold or silver that I invest in hardware. My straight ASIO and bypassing any
stupid Microsoft API has way more fidelity than anything else. NO windows 10
or any typical software ... In fact , Linux Cinnamon mint is the champ for audio.
I dual boot Cinnamon or my highly hacked Win7 for instant 60K FLAC libraries.
PS - most of this forum is just "chasing tails" .... really ! 😀
OS
are so noiseless and transparent that I wonder why any forum member would bother
"sweating" inter-connects or any other subjective material related issue that they think
would detract from their audio related experiences ?
I'm at stage 3 ,
Borrelia burgdorferi
is at my nerve endings and won't show up on a typical test.
Yeah , lyme is for the "lazy" , we have to diagnose (and even treat ourselves with
intravenous antibiotics).
Strange .... that somebody even is aware of this "ghost disease".
Same with a lot of this "ghost audio" hype.
Short of pure garbage interconnects at either my 4K HDMI or 5.1 audio
outputs , there is nothing one could either see or hear. Only an AP or CRO could
even begin to show any slight degradation with careful testing.
So , this audio "voodoo" is mostly hype. Sure ... there is a lot of economic junk
being passed on the to the typical consumer. Most of (our)the present designs
on the forum are far superior if properly built.
Here , I am "on the fence" with JC and others. Better materials will either make for "eternal" amps
and never having to be concerned with long term drift or just
to eliminate materials from the design considerations. If economics is a concern it is
even possible to create a design that can (mostly)negate things such as matching
or even lower tolerance passives.
If one then chooses to use better components with said design - WOW !
Audio is so simple ... best to leave it simple - FLAC ---> DAC --- amp/speaker.
I DO have the "fast" CFA's available to me .... "sub nano second" responses ?
Give me a break ... the air in the room is " primitive" - my slow 40v/us amps will
move that air just as fast.
Any simplifying of the source (below) is quite superior to any esoteric subjective
gold or silver that I invest in hardware. My straight ASIO and bypassing any
stupid Microsoft API has way more fidelity than anything else. NO windows 10
or any typical software ... In fact , Linux Cinnamon mint is the champ for audio.
I dual boot Cinnamon or my highly hacked Win7 for instant 60K FLAC libraries.
PS - most of this forum is just "chasing tails" .... really ! 😀
OS
Attachments
I agree believe don't question🙂
The emperor really does have cloths on if you squint.....
@Ostripper: Not good 🙁. In my time in Chicago Lyme disease was the one thing that scared me, even more than K-mart value food.
Agree on the simplicity. In a way the server with a USB DAC running Mpd is one of the best upgrades ever. Roon looks interesting but I don't want to have a screen on whilst listening to music. Still love the vinyl experience, but digital is very satisfying these days.
Agree on the simplicity. In a way the server with a USB DAC running Mpd is one of the best upgrades ever. Roon looks interesting but I don't want to have a screen on whilst listening to music. Still love the vinyl experience, but digital is very satisfying these days.
I could not go back ... (below 1 or 2)
No "Roon" M$ garbage. Not for audiophiles.
With my neurological symptoms , it would be hard to clean the Vinyl.
NO screen ON ?? .... what would I learn ? I can either be entertained by how far
my hearing has degraded with age or read all about my favorite artists.
BTW , Musicbee for W7 or Tomahawk for Linux Mint.
Full ASIO for either , full search/DSP/visualizations and lyrics/artist info.
Man , I wish I had this as a kid .... 60K titles and lots of informational toys to play with.
OS
Attachments
I may sound like a Yorkshireman, but the reality of 'university' in the UK is that 'students' have become accustomed to spoon-feeding - I believe some regulations require it. You have to produce handouts for the students with disabilities who are unable to make their own notes, and then 'Equality' demands that all students get the handout. Then woe betide the teacher who accidentally includes something in the exam which was not mentioned in the handouts, as you can't expect modern 'students' to read around their subject (or read any books at all).Derfnofred said:
It is well known that the purpose of 'education' is to pass tests, in order to get a job*. To pass tests you have to learn the right answer to all the questions which might be asked. To learn the right answer you just have to look at the model answers for previous years' tests, and remember them. In some cases there will be special 'revision' lectures where hints will be given about the content of this year's test; those who can't be bothered to attend the 'revision' lecture may get a handout.
* A 'job' is a warm office with free internet access and monthly pay.
When you talk nonsense it will be criticised; not because it is you but because it is nonsense. As I said, "learned" people can talk nonsense too, which is why we have peer review (to weed out the worst nonsense; less obvious nonsense still gets published). Electromagnetism etc. is not a matter of personal opinion but facts relating to the universe; facts which MH and others seem not to understand.john curl said:
You don't have to believe either of them. Instead, you can go to the books and learn about EM and then decide for yourself who is right. On this matter JN is right, not because he is JN but because he is right. He does not need to PROVE anything, as he is not making silly claims based on undergraduate level misunderstandings of physics.john curl said:
Yes, 10% of wavelength is big enough to see transmission line effects. One of MH's errors was to confuse propagation velocity in the wires with propagation velocity along the cable; the latter is also slower at audio frequencies but not enough to make a difference for most situations. Having misapplied the theory, and so failed to see the expected effect, he then changed the experiment and either didn't realise what he had done or hoped that nobody would notice (I suspect the former).Markw4 said:
Making a cable which has 8 ohm characteristic impedance across the audio spectrum is rather difficult. At the very least it would require very low conductor resistance and significant added inductance. Of course, 8 ohm RF impedance is much easier - I fear that people often do the latter and think they have achieved the former.1audio said:
I would like to thank Ed for wonderfully illustrating my point about bad experiments. Genuinely measuring nanovolts at almost any frequency is hard, but it is very easy to set up some apparatus and get a number on a nanovoltmeter. Of course, if you are not in a thermally stable screened room the number on the meter is meaningless.
I am trying to wean myself off multitasking too much and spending at least 40 minutes a day just listening. Create a playlist. Kick it off and then can use the phone as a remote if I need to pause. The great think these days is that there is a solution for whatever you want to do. I remain convinced this is the golden age for music.
Well DF
It is actually pretty easy these day to measure a nanovolt these days from a .1 ohm source. A low noise preamp using 10 AD797s, a sound card and a laptop will get you there. Now I have battery powered noise sources, oscillators, filters and small amplifiers, all quite useful for my work. If you actually try it you will see if you get any stray pickup. Interesting to hear why that would depend on cable directivity.
But then you didn't understand the setup to begin with.
It is actually pretty easy these day to measure a nanovolt these days from a .1 ohm source. A low noise preamp using 10 AD797s, a sound card and a laptop will get you there. Now I have battery powered noise sources, oscillators, filters and small amplifiers, all quite useful for my work. If you actually try it you will see if you get any stray pickup. Interesting to hear why that would depend on cable directivity.
But then you didn't understand the setup to begin with.
I haven't heard that one but there was a small fenced area in the compound where something spilled and they just put up a fence. They took a few shortcuts in the rush to get Plutonium and were short on materials and safety knowledge. No wonder it became a super fund site with all that and sub reactors laying out on platforms to be seen from space.
It is fairly easy to get a non-zero reading on a nanovoltmeter, but to get a meaningful genuine measurement of something actually coming from the source is harder in the presence of temperature fluctuations, broadcast RF, 50/60Hz hum etc. etc. If this voltage is also riding on a much bigger voltage at the same frequency then the problems become harder as you are relying on excellent CMRR, so first you have to carefully evaluate your CMRR and establish what gives rise to it and what can degrade it. The net result is likely to be that the number on the meter contains no significant figures. Note that repeating bad experiments (or similar experiments) over some years does not give rise to better results, but it may give rise to more confidence.simon7000 said:
You didn't properly explain the setup to begin with.
I have never been a good experimenter (I prefer theory) but that has not prevented me from time to time from watching with some amusement (or alarm) as a bad but confident experimenter obtains meaningless numbers from a poor setup. When I read the information put out by good experimenters I am amazed at all the issues which they have to consider, evaluate and eliminate (or compensate for) in order to get a reliable result.
Yeah , Bill .... besides never thinking of a day when I not only can browse the 60K
with a phone app , but even create the playlist and tweak the volume from the same
app .... this is truly a "golden age".
Some on the forum even want to be able to remotely monitor and adjust amp bias
and protection parameters with another app.
Or mute the solid state protection relays remotely.
Dang , even the amp will be IOT.
I'm all for that , but would still want everything to be backwards compatible with
the 20'th century (just in case) 😀 .
"Create the playlist" ... that fancy player I posted will look at what you normally
listen to and do a "auto DJ" to create a custom self generated list. It even looks
at what other tracks are normally chosen (by other users) from those same
albums , and will add them to the playlist. Nearly a local + internet "AI" to create
an engaging experience based on both you and others ...crazy !!
OS
Not at all, you have it dead on.
The length of time to reach steady state, or even 90-95% of steady state will be dependent on line length, line impedance, and load impedance. Ed is trying to make a speaker far away from the source have a consistent settling time, which means making the load impedance frequency independent, and by puttingthe characteristic impedance of the line as close to the load as possible.
I've long maintained that bringing the line rf z down to roughly 25 ohms will make the settling variance across a typical load range well below human thresholds, around 2 microseconds.
You've never been forthcoming on actual details on basically anything you talk about here, it's a pattern.
I do not wish your IP, so won't ask. However, it is important that you test correctly, I recall the last measurements you presented that were several orders of magnitude off inductance wise, so cannot even discuss what you've done right or wrong. I recall I had offered to help if needed, but you didn't reply to the affirmative.
As I am the only one to coin that phrase, I feel it is abused in your sentence. My experience is in sub nanosecond stuff. I've never claimed it is required for audio, only that experience in that realm informs me on errors made in test design.
John
Last edited:
What they were doing with plutonium at Dounreay in northern Scotland beggars belief... Well, it was a long way from anywhere, no one cared. Bulldozing highly contaminated waste into holes in the ground. When particles of plutonium started turning up on the local beach it got noticed though....
People have used parallel pieces of RG-8 to make low-Z wide-band high-power transmission lines. At least, it's doable off the shelf.
In any case, it sounds like Ed has an unusual application. Most people would probably use active speakers for that and send line level or digital audio out to wherever the speakers are.
Richard - there's a Hong Kong retailer selling the full range of Miulticaps on Ebay.
prices look like US retail, do you think their real?
prices look like US retail, do you think their real?
We really can't talk, our references are too far apart. A nanovoltmeter is a bit different than an FFT analyzer. If you played a bit with the gear you would get an understanding of what it can and cannot do. But don't worry other folks will probably try the tests then we can compare results.
Resolution is not so very great with a system like this. Analog catches subtleties that FLAC won't.
- Status
- Not open for further replies.