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cornelius@eisner.decus.org (George Cornelius): Jun 11 10:51PM -0400 >> We live in the real world, folks. The nubmers don't add up.   > The *numbers* add up perfectly fine, if one takes a fraction of a second to understand the process.   > "Harnessing all that energy"? Really? How does that happen exactly? Please describe the mechanics of your proposed system? Positing actual available materials in this 'real world'.   Not one sign anywhere of a person who has the slightest understanding of physics. Just people who pretend they know something because they listened to someone else who pretends to know something.   I took quantum mechanics 50 years ago. Then, as now, the physics of turbines and generators was well established and not really worthy of the efforts of anyone seriously considering research into what was really important in science. But of course, plenty of physicists and engineers and other technologists have made important contributions over the years, all incremental gains, with very little of these gains really earth-shattering in and of themselves.   One thing that has repeated over and over again in 50 years is the overabundance of blowhards and gasbags.   I'm interested in learning some new physics, though.   If you can produce one of these much-vaunted nameplates, I would love to see it.   If your wind generator is a turbine, I would love to see its spec sheet. Do you have a name for the manufacturer, and for the model number being used?   And, of course, there must be a primary contractor. Do they have a web site that describes the project?   Interesting thing about engineering firms: they don't stay in business for long if their claims are full of hot air. So how about a pointer to the keepers of the truth, where there are likely to be cold, hard facts and not merely the nonsense endlessly propagated by the true believers and their enablers, the purveyors of the hype?   George

"pfjw@aol.com" <peterwieck33@gmail.com>: Jun 12 04:47AM -0700 https://en.wind-turbine-models.com/turbines/428-gamesa-g114-2.0mw   https://en.wind-turbine-models.com/turbines/548-gamesa-g87   You can lead a whore to Vassar, but you can't make her think. (Dorothy Parker)   You would be that whore.   Peter Wieck Melrose Park, PA

Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net>: Jun 12 12:37PM -0400 > You would be that whore.   > Peter Wieck > Melrose Park, PA   I believe that's "You can lead a horticulture, but you can't make her think."   Cheers   Phil Hobbs

Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net>: Jun 11 02:28PM -0400 On 6/11/19 10:56 AM, three_jeeps wrote: > "The main phenomenon used in SRDs is the storage of electric charge during forward conduction, which is present in all semiconductor junction diodes and is due to finite lifetime of minority carriers in semiconductors." > Finite lifetime of minority carriers....I assume when switching from forward conduction to reverse the minority carriers are quickly reversed in their flow given the abrupt change of voltage polarity? > J   SRDs have been used for aeons. Besides pulsers, as in the 20-ps-class Tek SD24 TDR sampling head, SRDs are used as high-order frequency multipliers. You can still get them from Microsemi and maybe elsewhere--Arrow has 433 Microsemi GC2510 devices in stock.   One of my first engineering tasks back in 1981 was to rebias an X-band waveguide frequency multiplier using an SRD--we were changing from a Microwave Associates device to a Gigahertz Devices one.   The SRD was self-biased with a thick-film conductive ink drop on the side of the ceramic package. I used a soft pencil to make the resistive shunt on the new device, and varied it till I found the value that produced the highest efficiency.   The job was complicated by the tendency of the graphite to ablate. ;)   Cheers   Phil Hobbs   -- Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC Optics, Electro-optics, Photonics, Analog Electronics   160 North State Road #203 Briarcliff Manor NY 10510   hobbs at electrooptical dot net http://electrooptical.net

Jeff Liebermann <jeffl@cruzio.com>: Jun 11 04:41PM -0700 On Tue, 11 Jun 2019 08:15:05 -0700, John Robertson <spam@flippers.com> wrote:   >The meter going down to 0.001 ohms is handy too...   >Nag Bob if you want to see these in production, he isn't sure there is a >market for a talking ESR meter...   "Prototype "Blue2" talking ESR meter" <https://www.youtube.com/watch?v=kYbsDlQ8nPg> (1:23)   It might be more useful it also announced if the capacitor was good, marginal, or bad.   There are some talking multimeters available, mostly for the blind. <http://www.mastrogippo.it/2014/03/a-talking-multimeter/> I played with one such home built meter that was built around a Speak-and-Spell toy. <https://en.wikipedia.org/wiki/Speak_%26_Spell_(toy)> I found the talking feature most useful when I couldn't read the multimeter LED display in bright sunlight, such as working under the hood of my car. I don't think there's a need for a talking ESR meter that works in bright sunlight.       -- Jeff Liebermann jeffl@cruzio.com 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558

Phil Allison <pallison49@gmail.com>: Jun 11 05:04PM -0700 Jeff Liebermann wrote:   .................... > <https://www.youtube.com/watch?v=kYbsDlQ8nPg> (1:23)   > It might be more useful it also announced if the capacitor was good, > marginal, or bad.   ** Or, in Aussie parlance that would be: "beauty", "dodgy" and "fucked".       .... Phil

John Robertson <spam@flippers.com>: Jun 11 05:17PM -0700 On 2019/06/11 4:41 p.m., Jeff Liebermann wrote: > multimeter LED display in bright sunlight, such as working under the > hood of my car. I don't think there's a need for a talking ESR meter > that works in bright sunlight.   I use an ESR meter for things besides caps, this chatty one that goes down to 0.001 ohms is handy for finding shorts between traces, and other jobs, not just testing caps. Maximum is around 90 ohms.   Bob's newest ESR project (He didn't think the talking meter would sell) is an EasyESR which has three LEDs and three different tones depending on the result. So there is your point, however the value of the cap is taken into consideration so the middle LED if on is good if under 1000ufd but questionable if over 1000ufd.   Here is the prototype:   https://www.youtube.com/watch?v=o25gLeakcbM   Send him a note if you want it built!   John :-#)# -- (Please post followups or tech inquiries to the USENET newsgroup) John's Jukes Ltd. MOVED to #7 - 3979 Marine Way, Burnaby, BC, Canada V5J 5E3 (604)872-5757 (Pinballs, Jukes, Video Games) www.flippers.com "Old pinballers never die, they just flip out."

Allodoxaphobia <trepidation@example.net>: Jun 12 12:58AM On Tue, 11 Jun 2019 08:15:05 -0700, John Robertson wrote:   > Nag Bob if you want to see these in production, he isn't >sure there is a market for a talking ESR meter...   Just the thing for a blind repair tech! :-)   Jonesy

Jeff Liebermann <jeffl@cruzio.com>: Jun 11 06:03PM -0700 On Tue, 11 Jun 2019 07:56:08 -0700 (PDT), three_jeeps   >I never heard of one of these so google is my friend....(aka snap >off diode or charge-storage diode or memory varactor)   Which diodes are you referring to? I checked the R293 manual at: <http://w140.com/tekwiki/wiki/R293> <http://w140.com/tek_r293.pdf> In the description, it refers to "avalanche diodes". In the parts list, they are "Snap off, Checked" whatever that means. D224, D240, D274, and D290. <http://w140.com/tekwiki/wiki/Step_recovery_diode> >It probably has a lot of bad parts, given the age, and while repair would be quite a learning experience, my basis questions are: >1) how to determine the snap diode characteristics for this unique tek part?   I don't know. Start digging: <http://w140.com/tek_xref_free.pdf> <http://w140.com/Tek_RPR_152-_Diodes.pdf> Maybe more here: <http://w140.com/tekwiki/wiki/Reference_material>   >2) and what are the chances of finding a reasonable substitute?   Marginal. Finding an exact replacement, impossible.   The TEK part number in the manual for these "snap" diodes is 153-0023-00. Google doesn't seem to find anything. The Tek to vendor cross reference lists the part number as a "selected part" and "Sig, Snap off" with a vendor number of "Ref. only". That's not very useful information. This rather smells of bin selected parts in matched pairs, which is going to be difficult to substitute without know what parameters are being matched.   When you remove the diodes for testing in the R293, be sure to mark them with their original Rxxx reference designator so that the return to the same location on the PCB.   Looks like some of the microwave semiconductor houses still make step recovery diodes for use in comb generators, frequency multipliers, sub-harmonic generators, and maybe pulse generators: <https://www.microsemi.com/product-directory/varactor-diodes/3150-step-recovery-diodes> <https://www.macom.com/products/diodes/multiplier-step-recovery-diodes> <https://www.semigen.net/step-recovery-diodes/> <http://www.advancedsemiconductor.com/diodes/step_recovery.shtml> etc. You probably don't need rise times suitable for generating microwave frequencies.   >Assuming one of the snap diodes in the unit still functions, I >could use a curve tracer and get some general parameters...   Are you sure that there's something wrong with the original step recovery diodes? They might all be good and no replacement is needed. Maybe ask the same questions in one of the Tek specific Yahoo Groups?         -- Jeff Liebermann jeffl@cruzio.com 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558

Jeff Liebermann <jeffl@cruzio.com>: Jun 12 09:05AM -0700 On Tue, 11 Jun 2019 17:17:41 -0700, John Robertson <spam@flippers.com> wrote:   >I use an ESR meter for things besides caps, this chatty one that goes >down to 0.001 ohms is handy for finding shorts between traces, and other >jobs, not just testing caps. Maximum is around 90 ohms.   Yet another idea. Most supercaps have an extremely low ESR. For example, Murata claims 40 to 300 milliohms (measured at 1KHz). <https://www.murata.com/~/media/webrenewal/products/capacitor/edlc/techguide/electrical/c2m1cxs-053.ashx> Ask Bob Parker if he can build something to test those. I have no clue how to build probes with that low a contact resistance. Fat copper wires with silver contacts? I don't have an immediate application or market, but I keep running into supercaps with no way to test them for anything more than capacitance. -- Jeff Liebermann jeffl@cruzio.com 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558

"David B." <BDonTJ@REMOVE.gmail.com>: Jun 11 06:45PM +0100 On 11/06/2019 16:31, Phil Hobbs wrote: > some interesting work on that back about 2000-ish, so I took an interest.   > Cheers   > Phil Hobbs   Thanks for clarifying, Phil.   Do you agree with the conclusion reached by 'Cursitor Doom' or do you think it possible that steganography COULD be being used for nefarious purposes?   Are you aware of any specific software that I could use to determine if an image DOES have a secret 'hidden below the surface' as it were?   -- Regards, David B.

Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net>: Jun 11 02:06PM -0400 On 6/11/19 1:45 PM, David B. wrote:   > Do you agree with the conclusion reached by 'Cursitor Doom' or do you > think it possible that steganography COULD be being used for nefarious > purposes?   Depends. Probably if you took the image from Creative Commons or someplace and hacked it up, the steganography would probably be detectable. Even if it were very well encrypted and so not recoverable by ordinary means, just the fact that the noise floor of the image changed would be a bit of a pointer.   With an original image it would be much harder to spot, I expect.   > Are you aware of any specific software that I could use to determine if > an image DOES have a secret 'hidden below the surface' as it were?   No.   Cheers   Phil Hobbs   -- Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC Optics, Electro-optics, Photonics, Analog Electronics   160 North State Road #203 Briarcliff Manor NY 10510   hobbs at electrooptical dot net http://electrooptical.net

"David B." <BDonTJ@REMOVE.gmail.com>: Jun 11 08:00PM +0100 On 11/06/2019 19:06, Phil Hobbs wrote:   > No.   > Cheers   > Phil Hobbs     Your comments much appreciated.   Thank you, Phil :-)   --   [Cross-posted to 'Betty' group]

Shadow <Sh@dow.br>: Jun 11 04:20PM -0300 On Tue, 11 Jun 2019 20:00:53 +0100, "David B."   ><A_LOT_OF_PERSONAL_NAMES_AND_PRIVATE_DATA> ><OFF_TOPIC_TO_ALL_GROUPS>   I recently looked up the definition of Cyberstalking (a serious crime in the UK)   //Cyberstalking:   Cyberstalkers often claim that they are just flaming (AKA "investigating"), but newsgroup stalking is more than just dogging someone's posts with flames. This behavior rises to the level of Cyberstalking when someone does it consistently over an extended period of time.   Other actions that constitute Cyberstalking include:   doing extensive research on the victim's private life and using it to intimidate or harass   making threats of continuing online harassment   threats to cause harm to someone in "real life"   using the internet to engage in activity that is intended to cause harm to someone in "real life"   impersonating another person in newsgroups or chat rooms   repeatedly lying about someone to the extent that meets the legal definitions of defamation or libel//   Remind you of anyone ? If it doesn't, here's a clue:   Remember, DAVID BROOKS, every time you STALK, the bots pick up your "special" page, and you get more hits on Google. Not as a *good guy*. <https://web.archive.org/web/20190603181837/http://tekrider.net/pages/david-brooks-stalker.php> or http://tekrider.net/pages/david-brooks-stalker.php Your psychopathic behavior will soon be known to all. []'s -- Don't be evil - Google 2004 We have a new policy - Google 2012

Clifford Heath <no.spam@please.net>: Jun 12 09:37AM +1000 On 10/6/19 6:52 am, Phil Hobbs wrote: > to crack--it's embedded in low-order bits of the low-spatial-frequency > components of an image.  Good steganography even survives printing + > scanning a paper copy.   Bear in mind that storing data inside images is only one kind of steganography. Another that piques my interest at present is hiding the output of a voice codec inside another audio stream. CODEC 2 looks particularly suitable. But essentially you can hide data inside any other bulk data format. It would be trivial to store large amounts of data inside any PDF file, for example. The whole thing is a big lookup table of assorted data objects that reference each other, so you can insert a new one and no-one will notice it's not referenced.   Clifford Heath.

Jon Elson <elson@pico-systems.com>: Jun 11 05:09PM -0500 On Mon, 10 Jun 2019 00:34:31 -0400, bitrex wrote:     >> brick that communicates with the motherboard and if it detects it's not >> Dell OEM it prevents the battery from charging at full speed and >> throttles the processor. down to 400MHz. The older ones I have just have a resistor on the center pin that tells the charger in the laptop whether this is a 60W or 90W power supply. But, they ALWAYS have to keep making things harder, more complicated, to lock out competition. Groan...   Jon

Jon Elson <elson@pico-systems.com>: Jun 11 05:21PM -0500 On Sun, 09 Jun 2019 23:20:37 -0500, Unlisted wrote:     > There is a lot of truth to this. Linux damages the hardware on a lot of > computers. It also destroys hard and flash drives. I have seen it > happen. Pen drives are usually the first to be destroyed.   Ummm, I've been running Linux on a variety of machines for over 20 years now, almost exclusively. If I need a Windows app, I run Windows in a VM on the Linux system. My last main desktop was a used eBay Dell Optiplex (commercial) model, and ran 24/7 for 12 years, and is still running at my mother in law's place (still under Linux). I've had several other Dell Optiplex machines used as my web server for the last 15 years or so, had to upgrade them for more performance, not because anything went bad.   There's at least 10 Linux systems at my house, some running 24/7, others just booted up when needed.   It is possible to have heavily used flash drives (SD cards, USB sticks and SSD drives) wear out if certain settings are not made to reduce writing to the drive, mostly the noatime setting. This is very easy to do, and may be done automatically on newer OS versions.   So, I don't know where you get this info, but it is patently wrong. Check what OS is used by major data centers, ISP's, etc. You will be amazed that there is a HUGE amount of this done using Linux.   Jon

Jon Elson <elson@pico-systems.com>: Jun 11 05:23PM -0500 On Tue, 11 Jun 2019 00:26:52 +0000, Roger Blake wrote:     > I think early on there may have been some laptops where fans were not > handled properly, causing things to run too hot. Don't know if it rose > to the level of hardware failure though.   Yeah, we're talking about 1996, maybe?   Jon

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