John Curl's Blowtorch preamplifier part III

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RNM,

Just returned from a wedding where I sat with an old friend, a gerontologist. He told me even with a GFR of 15 and no other issues you should still be around to see the apple of your eye graduate.

BTY it is not what you eat that really matters, it is what you avoid. Surprisingly oranges, bananas and sea salt are on the bad list.

So even without a transplant or dialysis you should still be fine for a few more weeks! ;)
 
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I avoid nine grain bread, kale, catfish, tripe, chicken feet, pig's feet, mutton, deer, elk, bison, braunschewiger, urine soaked goat cheese, jackfruit, poisonous sushi, haggis, real thing kimchi, abalone, ouzo, retsina, soji, white zinfandel, cooked domestic pets, raw domestic pets, starlings, and pigeon.

Am I going to die prematurely because of this?
 
@mmerrill99,

Thanks for bringing the New Yorker article to my attention; the book by Mercier/Sperber seems to be quite interesting.
Yes, the book seems interesting as does the article & it does touch on the many issues that we see in many social groups such as audio forums & how the group think is difficult to overcome - for instance the amount of time, logic & cited research we both expended in explaining how the usual ABX blind tests demanded on forums are no better than the anecdotal listening reports, despite being used to 'prove' the anecdotal reports are wrong.

Despite having seemingly reached some 'understanding' with some, they still seem to ignore the difficulties involve din blind testing & are happy to continue using such 'tests' as 'evidence'
 
I had the privilege of being taken to an associate's house about 1hr away (if traffic allows) to hear the latest upgrade of an amp that this engineer and I have been working on for about 10 years. At the same time, I got to hear what Jack Bybee is up to these days. I must say that my colleague's (the engineer) system had much more 'spaciousness' than what I am listening to at the moment. I realize that I have restricted myself to glorified MONO compared to what I heard at his house. Most of this is due to Jack Bybee's new inventions scattered around his listening area, and I got a couple to try myself. I can't tell you much about them however, too far out.
If the stuff he makes really does work so well it’s a shame it has to be so secret. He’s going to die and take it all with him like the Western Electric transformer winders.
 
Jack's new stuff is based on his own paid for researches, not the government, but he doesn't want to share it in any case. I teased him about it yesterday, that it might 'die' with him, but he knows how to keep a secret. This new stuff is based on new resonances, compared to his older stuff. It works by changing the perception of the physical space it works in. Magic!
 
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Hi Robert,
Sorry, none of this is true. It's all a sham.

The very first premise is that it's a government secret. If this were true, not one example of the product would exist outside of very secure areas in the USA. The stilts this house of cards is built on are blindingly obvious to anyone who can reason and understands the very first thing a government will do to keep a secret.

Once upon a time, Canada developed an advanced fighter plane called "the Arrow". The US military-industrial complex didn't like this very much, and someone who shall not be named buried the secret. They cut up the flying prototypes that had flown, the models, and some were flown into Lake Ontario. The plans were confiscated, cut up or burned. Nothing of this project was left in existance. We now have found a few scraps, but this is what the US government wanted a weak kneed Canadian Prime Minister to do. He followed orders like a good little soldier.

The Arrow? It had been seen commonly in the air around Toronto, Ontario. Everyone knew it existed even if the name wasn't common knowledge. They still disappeared it.

So if you believe that the government, any government, would allow a military secret to exist in public, you are more gullible than John and his friends ever hoped believe.

-Chris
 
Jack's latest stuff is partially based on some original work by someone in Germany, a few years ago. He followed up with hiring some research people and now he does something similar. The new devices tend to 'expand' the room size for some reason. Don't worry anybody, Jack is not going to try to sell these new devices to any one of you. They are just a fascinating experiment at the moment.
 
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Hi John,
This has nothing to do with Stuart actually. It is simple knowledge of human behavior and how governments work. While you might well get new ideas from Mr. Bybee, you are not getting secret US inventions. It's not nice to pull gags like this on folks who do not excel in electronics or physics. Jack is indeed making a fair amount of money off this gag, and this marketing concern may as well be back in the 1800's selling "tonic". It's the same mind set and actions.

So if you want to put a name to this rejection of your claims, please use mine. At least get the players right.

-Chris
 
Jack makes very little money, proportional to the amount of time, effort, and money that he has invested in his devices. He is already independently wealthy due to other companies that he built up and sold in the past, he just wants to improve audio quality, but he works a lot harder than I ever would on his ideas.
Our mutual colleague, Mike, who has worked much closer to Jack over the last decades than me, discussed the situation for several hours on the drive to and from my apt. Mike was skeptical at first as well, as he reminded me yesterday, but what works, works!
 
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It's called Pot I think John, or maybe LSD.

If Jack is expending more effort at this point in time than shipping, he's doing it wrong. He has a pool of cheap labour that he can have casting this junk, and packaging, then shipping. Everything else he has already done. A person that intelligent (you say) can't be so incompetent that he loses any amount of time personally. Really!

-Chris
 
Is hookup wire, or soldered wire directional? How would you find out?

Or even: is solder wire directional? If not why don't people make wires out of it so they don't have to worry about the issue? But if it is, how can you tell after it melts? If it creates a blob, is the blob directional? If so, how can you tell which end of a circular blob is the input and which is the output? What do you do if the center of the blob is one of the terminals? If a cable is directional, does that not imply a difference in electron transport in each direction, and if so does it cause a cumulative DC offset? I know for a fact that at least two of the manufacturers of "directional wire" have no clue what direction the strands were drawn in order to infer any directionality. Apparently I don't have as good an imagination as some others here because I can't imagine why these effects would happen at the bulk atomic level and cause audible issues...and if this subject is merely mental masturbation, what does the climax feel like? Interested minds want to know!

I found it at least interesting to see discussion of possible real world audible issues such as the IMD when passing highly complex signals through DAs...or is that too pedestrian? One of the things a device much maligned here called the Pono Player can do is sound extremely clean when decoding mixes which are congested compared to other DAs I have like the Dragonfly which sounds pretty good under most other circumstances. My fave to date is the Auralic Vega, but it costs 10x the Pono for a bit higher output voltage and transparency depending on which filter type is chosen for which kind of music. Do others have this experience with differing DAs? Any solid evidence from testing and listening as to what causes the difference?

Howie
 
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I still would like to buy the cables which some here say have directional affects........


meanwhile... I found this 15 year old music system picture of mine... one half of the speakers seen.

Picture2 096.jpg

Rear loaded transmission line 18 inch bass cabinets... Dynaudio Esotar drivers in BMTMB, mono amps of .01% thd at 450W/8.


THx-RNMarsh


Got Bass?
 
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...Do others have this experience with differing DAs? Any solid evidence from testing and listening as to what causes the difference?
Howie

I can start the discussion stating I can sometimes hear a difference in the Pono when running from the internal battery or when being charged by a 5V USB adapter, so some of the difference between DAs may be PS residuals an/or common-mode mains noise conduction. DAs powered by the USB like the Dragonfly could potentially suffer similar issues, as could any mains-powered DA without a good enough PS or mains isolation. Interestingly with the Pono this difference happens without any noise audible in quiet/between tracks parts. This implies a form of dynamic modulation only when there is signal. Does this mean the PSRR is good, and there is another mechanism by which PS noise can modulate the audio? I have always (perhaps blindly) thought that PSRR spec took into account any PS AC components getting into the signal path in the specified bandwidth. What say ye geniuses?

Howie
 
. Interestingly with the Pono this difference happens without any noise audible in quiet/between tracks parts.

Hi Howie,

Don't know if you noticed but I have been modding cheap imported dacs for the past few months, always based on the ES9038Q2M mobile ESS Sabre chip.

Sure there is dynamic modulation and other effects at least with this type of dac. It seems that everything matters: power supplies, clocking, output stage circuitry, layout, PCM/DSD, filtering, sample rate, DPLL bandwidth, harmonic distortion compensation, and whatever else. Trying to approach the fidelity of a very good $2,000 dac requires the best one can do in every area. That would be my opinion, anyway.

Unfortunately, the relationship between, say, power quality and sound quality is very complex. Depends on which power supply we are talking about and the nature of power quality imperfection. At least, this is my impression from listening to a number of variations of Q2M implementations.

Also unfortunately, I am neither equipped nor have the time and energy to study everything in detail so as to quantify what it is I am hearing. If that were my situation then I might be seriously thinking about getting into the dac business. Fortunately, I am happily retired and fully intend to stay that way. :)


EDIT: While being involved in the foregoing I have also been watching what other people are doing, and talking to some people offline about experiments and listening impressions they have experience with. Basically, people tend to notice the same kinds of things, but most of the focus around here seems to be on the analog end: power supplies, output stages, and clocking. Haven't seen other people playing with the other things I talked about, especially hardware upsampling to DSD just before the dac chip, which seems the optimal point to do it (perhaps because of best jitter reduction). Or at least, that is my impression so far.
 
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