That would significantly apply to the history of organized medicine. Hand washing in maternity wards? Gulf War Syndrome claims are lies? The problems are still with us, I could go on and on with examples. These things stem from human nature. As does the reflex disgust reaction when it occurs.
Big danger in putting all alternative medicine on an equal ground it cheats those with 100's of years of data (albeit empirical) relative to some nonsense a new age'er just made up yesterday.
Not talking about equal ground. Talking about equal brain biases and heuristics causing problems even among those much more sophisticated. It's not easy to avoid, and is not simply attributable to immoral behavior or aberrant defects of character.
That ain't the tip of it.
Please do, perhaps better to start another thread, this would be interesting.
Yes.
Dan.
I'm told one of the first op amps still has a following. Perhaps I even read it's still made.
http://www.analog-innovations.com/SED/MC1530-TeachingExercise.pdf
http://www.analog-innovations.com/SED/MC1530-TeachingExercise.pdf
Blumlein circa 1935. If you like ECC types were made for that very reason. As far as I know no op amp in valves offered a buffered output which is required for special functions we take as what op amps do. Mini power amps. Mechanical devices will do similar ( toilet valves ). H C Lin seems to have been the originator of millitary devices that were rejected circa 1960. The designer of MC1530 seems to have been thrown out of the nest early on. Scott might know him.
Yes nige, I've mentioned before you Brits sometimes pay no attention to what happens outside the fold. As for the MC1530, that would be an old Motorola part, looks like all NPN very primitive and probably has fans due to it's unique "effects".
... and when they do find out, like Barrie, they'll join you rather than try to beat you 🙂
Jan
Its author, Jim Thompson is still a daily regular in the usenet group
sci.electronics.design. He also did a huge amount of ECL chips
for Moto. Must be way over 70 now.
regards, Gerhard
(s.e.d. is infested with politics even more than audio web sites
are infested with esoterics. Horrible s/n.
But then, Win Hill is often there and some others. )
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The (stereophony) illusion fascinates me as well. It's such a huge failure of our sensory/perceptual system, though we've managed to wring a lot of enjoyment out of it during the last century or so.
Somewhere I read a fascinating comparison - imagine if our (human) visual perception suffered from the same stereophonic illusion as our hearing does. If you were on our ancestral savanna, and spotted a hungry lioness on your left, and her identical twin sister on your right, you would "see" one single (nonexistent) lioness straight ahead of you. And you would probably run sideways to avoid her, straight into the jaws of one of the two actual lionesses. 😱
I'm thankful that my stereo speakers are not carnivorous! 😀
-Gnobuddy
I’ve received a reply from Ian Hegguln on the weighted distortion filter.
Ian’s filter is active but the passive ITU in modified form has possibilities for my purposes. Inductors not a problem as I developed some electrically calibrated inductors years ago using DC core tweaking.
I find the John Curl interview especially interesting because the focus point of physics is suggested as opposed to engineering/auditory.
Here is the body of his answer.
“”
John Curl explains the problem as FM distortion (PIM) in an interview "Words of wisdom" here
http://www.parasound.com/pdfs/JCinterview.pdf
on p26 on Feedback and PIM Feedback causes FM distortion . Also p153 need high open loop bandwidth to remove PIM.
Finally, the following may be a key to unlock the puzzle and do a bench test: "Crossover Distortion in Class B Amplifiers", Electronics & Wireless World, July 1987, scan of EW article
http://www-f9.ijs.si/~margan/Articles/Class_B_Dist.pdf
Erik Margan first measures a transient distortion in power amps, but
go to this update for a better plot of transient distortion in a measured power amp see http://www-f9.ijs.si/~margan/Articles/Amp_Distortion_Dynamics.pdf "Amplifier Nonlinearity: Dynamic Effects" 2013 Fig 12 (bottom trace) shows phase errors in a real amp.
“”
-back later
-bruce
Ian’s filter is active but the passive ITU in modified form has possibilities for my purposes. Inductors not a problem as I developed some electrically calibrated inductors years ago using DC core tweaking.
I find the John Curl interview especially interesting because the focus point of physics is suggested as opposed to engineering/auditory.
Here is the body of his answer.
“”
John Curl explains the problem as FM distortion (PIM) in an interview "Words of wisdom" here
http://www.parasound.com/pdfs/JCinterview.pdf
on p26 on Feedback and PIM Feedback causes FM distortion . Also p153 need high open loop bandwidth to remove PIM.
Finally, the following may be a key to unlock the puzzle and do a bench test: "Crossover Distortion in Class B Amplifiers", Electronics & Wireless World, July 1987, scan of EW article
http://www-f9.ijs.si/~margan/Articles/Class_B_Dist.pdf
Erik Margan first measures a transient distortion in power amps, but
go to this update for a better plot of transient distortion in a measured power amp see http://www-f9.ijs.si/~margan/Articles/Amp_Distortion_Dynamics.pdf "Amplifier Nonlinearity: Dynamic Effects" 2013 Fig 12 (bottom trace) shows phase errors in a real amp.
“”
-back later
-bruce
You make an excellent point, Mark!
Fortunately, that particular optical illusion doesn't seem to occur once the object(s) you're looking at are far enough away for the field of view of our two eyes to overlap. At least, I guess that's why the "lioness and her twin sister" problem doesn't occur in normal day-to-day life.
(These days, the illusion would probably involve two identical Toyota Camrys in a parking lot, rather than lionesses. 🙂 )
Your mention of the stereoscope reminds me of listening to a stereo signal through headphones. For me, the stereo illusion disappears to a substantial degree, and I'm left with much of the sound appearing to come from a perceived location somewhere inside the rear center of my skull. Not entirely a pleasant experience.
I once made the mistake of mixing a home recording late at night, using headphones to avoid disturbing my wife or the neighbours. The finished mix sounded decent through the headphones, but was utterly horrible when played back through my speaker system the next day.
-Gnobuddy
Markw4, well we tried ur files.
There were a number of people present.
My report is best stated as saying that the files were not conducive to making a satisfactory determination, in that system, as played back.
_-_-
There were a number of people present.
My report is best stated as saying that the files were not conducive to making a satisfactory determination, in that system, as played back.
_-_-
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