John Curl's Blowtorch preamplifier

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#10,901
john curl said:
The AP with its unique drive system does not resolve these differences. Remember it is fully floating transformer drive. Seems to make a big difference, including a mistake in the JC-2 that PMA found recently. Thanks again PMA, you are not forgotten.
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The alternative of course, is that they have chosen the transformer to eliminate the artifact.


Remember, I've never said your not on to something. Just not what you think.

Cheers, John
 
#10,903
I, originally, thought that I was emulating the distortion the VDH found with his test equipment. However, when I followed up, I found that he was measuring at a much lower level than I was, so it might well be an artifact in the measurement setup. Also, a transformer drive like the AP uses seems to ignore it as well. However, most audio equipment does not use transformers, so the 'distortion' still could be there with normal use.
Still, it is repeatable for the same type of cable, especially cables with low usage. It can be very distinct with different types of cable, and some very expensive cables are actually worse than some very cheap ones. It will behave in the same manner with different ST analyzers, so it isn't necessarily a 'cold joint' or something like that.


The poorer measuring cables still have a low impedance return path, below easy measurement with a Fluke or HP multimeter.
I have dropped talking about the test, because it might well be an artifact of my specific test set-up, and I don't have the extra money to invest in even more exotic test equipment.
Perhaps it is better to 'put it to bed' until someone, somewhere, really wants to find why the different cables generate different distortion spectrums. That's OK with me.
Demian, you are certainly welcome to come by sometime, and I will show you the test. If you come, could you please bring the Quantech 2173 and the Owners handbook for the 2173? Dimitri is now after me for details on the Quantech.
 
#10,904
scott wurcer said:
Ken,

Did you catch the CNN show on Blacklight Power?, if these guys put up the do-do will have hit the fan and, as you say, Pandora's box will fly open.
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I haven't seen it, but their particular brand of 'goodies' is in an area that is uhm, a bit more accessible to most with a rigidified (fossilized) physics and engineering background, so these sorts of 'directions' tend to get the press when the baseline of many of the other contentious, er, subjects is at least as valid. They all stem from the same point of logic, it's just a bit difficult to see when you are on the other end of the 'logic formation' point of the singular base point of understanding.
 
#10,907
Juergen Knoop said:

please...a magic black powder, put into a reactor, produces a temporarily heat output...what kind of proof is this? 😕
regards
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These guys definately have their necks out. If this turns out to be a scam I predict it will sour the environment for all this type of stuff. BTW check out the latest philanthropy scam, it seems someone has been cleaning the clocks of Boston's finest.
 
#10,911
a continuous process would impress me more.
Like a machine that would provide measurable energy output over a sustained time, whilst measuring the amount of input fuel.

The setup, as shown on the blacklight site, doesn't exclude the possibility of chemical stored energy in the powder.
I wonder why the authors didn't adressed this suspicion with more care.
They must be aware of these doubts or?
This university professor acted like Colin Powell in front of the U.N. security council. 😕
regards
 
#10,913
john curl said:
I, originally, thought that I was emulating the distortion the VDH found with his test equipment. However, when I followed up, I found that he was measuring at a much lower level than I was, so it might well be an artifact in the measurement setup. Also, a transformer drive like the AP uses seems to ignore it as well. However, most audio equipment does not use transformers, so the 'distortion' still could be there with normal use.
Still, it is repeatable for the same type of cable, especially cables with low usage. It can be very distinct with different types of cable, and some very expensive cables are actually worse than some very cheap ones. It will behave in the same manner with different ST analyzers, so it isn't necessarily a 'cold joint' or something like that.


The poorer measuring cables still have a low impedance return path, below easy measurement with a Fluke or HP multimeter.
I have dropped talking about the test, because it might well be an artifact of my specific test set-up, and I don't have the extra money to invest in even more exotic test equipment.
Perhaps it is better to 'put it to bed' until someone, somewhere, really wants to find why the different cables generate different distortion spectrums. That's OK with me.
Demian, you are certainly welcome to come by sometime, and I will show you the test. If you come, could you please bring the Quantech 2173 and the Owners handbook for the 2173? Dimitri is now after me for details on the Quantech.
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As I asked you three, maybe four years ago. What correlation is there between the shield resistance of the IC's, and the results you measured...last time I asked you this, your response was profane..

I still believe you are measuring a ground loop. AP found this problem, and resolved it via transformers...

I STILL, to this day, believe what you have found to be of IMPORTANCE. It shows the ground loop problem, as it affects the IC's..not micro-diodes, or grain boundaries, just resistors, inductors, and oxidized connections.

As I requested 3 or 4 years ago, what are the details, as I wish to collaborate on resolving the problem..

As I recall, your response at that time was also, sonething that cannot be repeated here..

I still remain open to possibilities, to collaboration..

The ball has always been in your court. Recall the e-mails??

I'll post the diagram tomorrow.

Cheers, John
 
#10,918
jneutron said:


Go to What's new by bob Park, in the APS site. Apparently the blacklight power people go way back. Lots of perpetual motion stuff.

Cheers, John
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It figures, I actually have amused myself with these sites off and on. I thought maybe a high profile failure might stir things up, maybe not. Even my alma mater's Tecnology Review gave the energy from water stuff the nod. I guess people are getting very desperate.
 
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