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User: Perdo

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  1. Re:100 Watt wireless router? on Amateur Radio Packet Over 802.11 Cards · · Score: 5, Informative

    I was witness to a darwin award winner who unlatched a waveguide and looked into the rectangle end. He said "hey, there's hot air blowing out of here". I looked at him to see what he was talking about, then destroyed two klystrons by slapping the main power breaker. Klystrons need cooling air to prevent them from cracking and implodeing after the driving voltage is removed from them.

    This warm air is also bled into the waveguide itself to drive out any moisture that would impede your signal.

    You see, the guy looked straight into a waveguide pumping out 2000 watts at 4.7 Ghz that required 30,000 watts of 480 volt 3 phase AC to generate.

    And that dude, well, that dude was dead before he finished the word "here"

    AN/TRC-170 V2 Army/Airforce Mobile Troposcatter. Baddest pair of micky mouse ears you will ever see on a battle field. Two 81 db gain 10 foot dishes, 10 feet in the air, and 10 feet apart. 560 foot danger zone in front of the dishes. After a few days transmitting, the ground in front of the dishes would be littered with the corpses of birds, rodents and the scavengers that came for the easy meals.

  2. Re:interference on Amateur Radio Packet Over 802.11 Cards · · Score: 4, Interesting

    A microwave oven has a "white" high power amplifier inside. It tries to transmit as close to 2.4 Ghz as possible, as this is the resonate frequency of water molecules. The actuality is they produce a more "white" RF, like a white lightbulb produces a broad spectrum of light compared to a laser. Any saw filter placed on such a transmitter, would get very hot indeed, and would waste the energy that could be used to heat the food. The filter would get hot instead of the food.

    Since the RF is white, there is no way to design a feedhorn or antenna to properly radiate the power. High VSWR would kill the transmitter in a very short period of time. Food in the microwave acts like a dummy load. It absorbs the RF, so little gets reflected back into the transmitter. VSWR as low as 15% of total power out of a klystron will make it explode in just a few seconds. The electrons "piling up" forces the klystron to act like a capacitor, and the electron gun will arc with the collector, causing the glass vacume chamber surrounded by rare earth magnets to implode with a force compounded by the high voltage being applied to it.

    Suffice to say, a klystron out of tune or improperly capacitance match with it's antenna goes like a grenade.

    Make sure you disable the power supply safety interlocks and bypass the fuses in addition to cutting a hole in the door of the microwave to achieve this effect.

  3. Re:Licence revoked: on Amateur Radio Packet Over 802.11 Cards · · Score: 1

    Here is some rope, enough to hang yourself with :)

  4. Re:100 Watt wireless router? on Amateur Radio Packet Over 802.11 Cards · · Score: 4, Informative

    RF poisoning symptom progression:

    Head ache.
    Stomach ache.
    Permanent Sterility.
    Unconsciousness.
    Death.

    In other word, if the RF makes you pass out, welcome to silicone testicles and Testosterone shots for the rest of your life.

  5. Re:interference on Amateur Radio Packet Over 802.11 Cards · · Score: 2

    Doesn't everyone know how to make a klystron high power amplifier? I could slap one together out of a 6 or 7 inch picture tube and 5 rare earth magnets. Tuning it would be difficult but if you let it use it's natural frequency, there would be no need to tune it at all. 2.4 Ghz at 100w, Just what the world needs.

  6. Licence revoked: on Amateur Radio Packet Over 802.11 Cards · · Score: 4, Insightful

    Transmit 100 watts across a city, at 2.4 Ghz, and see how long before your amateur radio license is revoked. Part of their rules are to never use more power to conduct your transmission than is necessary. Since 100mw with a high gain antenna is enough power to transmit to the limits of practical line of sight, using more than 100mw is using more power than is necessary. Also, to transmit, you must listen to the channel you are about to transmit on to insure no one else is using that frequency at that moment. Since 2.4 Ghz devices have become so ubiquitous, it is impossible to transmit without stepping on someone, somewhere.

    This story reminds me of the one about the website that teaches people to make an x-ray machine. Nice to know, but definitely not for the irresponsible masses.

  7. � terabit music jukebox on High Density CD-Audio Solutions? · · Score: 3, Interesting

    the drive space required to hold 350 cds uncompressed cost about $400. Add another $200 for a ATA 100 controller card and a 5.1 soundcard with spdif outputs. Be the first kid on your block with a ¼ terabit music jukebox. I'm assuming you have a rack system with spdif in. Otherwise tack on another $300-$400 for THX certified 250 watt speakers. Still, $1000 beats burning copies on cdr to stick in two 200 disk changers, still without a decent interface to search and find specific songs and compile playlists by point and click.

  8. Re:sounds fair on Apple @ MacWorld Tokyo · · Score: 2

    "Last week, when a few hundred miles from home, I had need to access the serial console of lots of Sun hardware on short notice. So I ran out and bought an ibook, something I'd been meaning to do soon anyway."

    http://www.keyspan.com/support/macosx/usa/

    Hardly something you can go down to the local store to buy. So, you are saying that you had your handy-dandy keyspan adapter with you but not your old laptop... uh-huh.

    Which does require you to download drivers for:

    'The Windows-using admin with whom I was working started giving me instructions about downloading an ssh client.

    "No need, open ssh is part of the standard OS distribution."'


    Unless you happened to have your keyspan adapter and the keyspan driver CD with you, but you didn't even bring your laptop. Nice attempt to extricate yourself. But still a flawed fabrication.

    You have no credibility, so I will not take you at your word concerning your experience.

    Additionally, the page you referenced is the number one hit on google for os x usb serial adapter. I can only surmise that you did some research after the fact to support your post because a month ago, the number one google hit for the same query was a press release touting Keyspan's OS X beta drivers, which caused the OS 9 drivers to cease function, which seems to carry over into the production version.

    So, let's say that hypothetically, you are a hotshot computer wiz. Waltz down to the local CompUSA to purchase a new iBook. That might take an hour. Catch the Hello, Bienvenidos, spin through the registration process, where you get asked four times if you are ready to use the internet, get scolded for not being ready for the internet, and even if you are not ready for the internet can you please hook up to a telephone line so we can connect you to the apple directly so we can register you.

    Wait on fed-ex to deliver your keyspan, or in your case, since you had it and the install disk with you, you install it and get it configured for the Internet.

    But all this time, you have a client that has been waiting on you for something like three hours, while his 2 million dollar sun server farm is sitting idle because you forgot your laptop at home but remembered to bring your keyspan with install disk.

    How heroic of you to run to the store to get the tools that you should have brought with you anyway. You are proud of this? So, are you getting paid or are you getting sued for his downtime?

    Master mechanics carry their own tools. Union carpenters bring their tools to the jobsite. I always have my old laptop in the trunk of my car, currently an MP3 player, but easy to use as a file server to rescue someone's data when their computer dies. It has a serial port built in. I also have a 1400 with newertechnology G3 upgrade in a bag with cds burnt with every utility including drivers for every brand and make of printer/scanner/camera/usb key/external drive/complete set of every update you can get through mac software update and windows update, all the software I ever use while working. I also carry perfect disk images of 7.6 on zip with scsi drive, 8.1, 8.6, 9.0, 9.0.4, 9.1, 9.2 and 10.1 and my latest creation, a micro ATX fileserver with two 80 gb drives mirrored and partitioned with perfect ghost images of the four PC configurations used on my network. In a box in my trunk I also carry an HP wirescope, Punch down with 110 blade, a box of running spares of commonly broken or needed items like CD drives, memory, nubus/ISA/PCI NICs, Phonenet modules and terminating resisters, Mice, mice balls, patch cables, and a ancient analog VGA 640 by 480 flatpanel, because I do not want to lug a monitor to use to troubleshoot a black screen.

    Fully rebuilding any system on or off my network takes me about 5 minutes of my attention, go do something else for a while, then come back for 10 minutes to complete individual configurations and replace the users data back onto the computer.

    You were out buying a glossy new iBook while he had 1000 people Idle at their desks for three hours. Let's say they were $10/hr cube proles. He lost $30,000 plus Three hours of pissed off help desk people lying to customers about the network being down, while you were "out shopping"

    If I have to spend more than 4 hours a YEAR on any one desktop to get it up and running and maintain it, I am behind schedule.

    I would never hire you to do a damn thing for me. Because you are more unprofessional than anyone I have ever worked with in IT. Since you would quickly develop a reputation in the industry for shoddy work, you would not be hired by anyone.

    So again, lets say you are the genuine article. you are, by the nature of having recieved the DP3 (Developer Preview) release of OS X, biased in your opinion of OS X, because your job depends on it. You bet the ranch, or at least your professional life since feb 2000 (that is closer to the correct release date of DP3) on OS X being successfull. We can discount your opinion for obvious bias. But I really think you downloaded it on daddy's cable modem from some annonymous ftp.

    I do not think you are a Net Admin or Developer of any stripe. I think you are a 13 year old mac fanboy that got caught in a fabrication.

    Go ahead and dig yourself deeper. I am waiting with baited breath for your next stunningly obtuse comment.

  9. Re:UI for end-users, not admin on Wall Street Embraces Linux · · Score: 2

    Exactly, there is very little I do not know about setting up individual boxes using Win 2000 or Mac OS. Learning those systems is easy because starting out is easy, not because doing it right is easy. Learning Linux is hard because starting out is hard. I've certainly set up Linux boxes but I have no idea if I have done it correctly because there are as many "best practices" as there are version of distros. When I have to recompile the kernels of a hundred machines, with different hardware configurations, just to incorperate a necessary security feature, my time is gone before I have even put the boxes into production pre-testing.

    But then despite all OS maker's claims, there is nothing out there that you can power up and go. The best solution would make all network administrators obsolete. I dont need a button, in the words of Neil Stephenson in "In the Begining was the Command Line" that says "Live". I need a button that says "Start here then go on to more important things".

    Linux is an incredibly powerfull OS, but that makes it an end, not a means to an end. It's incredibly functional command line means that you have to understand it all, the moment you first start using it. This is great for people who have been using it for a few years, and horrible if you are new to the platform. I need something I can use right now, not "gee, after spending a few years learning Linux, you will be able to sucurely put a box into production."

    There are examples of Linux boxes done right. Tivo comes immediately to mind.

    What we need are some task specific distributions:

    Fileserver Box, web based administration, bulettproof security. Install this distro on any box and you get an instant fileserver.

    Mail server, all the above and again, instant mailserver.

    DNS server, Web server, Node for a Cluster, Graphics Workstation.

    Hardware and the OS is cheap compared to the time it takes to Set it all up.

    Does this sound reasonable? Is it possible? Is anyone currently doing it?

    Linux can do all these things, probly better than most operating systems, but getting this kind of functionality out of a universal Distro is exceedingly difficult, because you need to know everything before you can even start.

  10. Re:Linux not really "free"? on Wall Street Embraces Linux · · Score: 2

    Linux is free (as in beer) if your time is worth nothing. Since we can assume Merril Lynch has to pay someone to install, configure and administer their Linux boxes, they will have to pay for someone's time. If Linux is easier to administer that the systems they are replacing, they will save money. If Linux is difficult to work with, it will cost them more money than the alternatives.

    This, I belive is as good an arguement as any for improving the user interface of Linux. We are not trying to make Linux a good choice for dumb administrators, we are trying to lower the intellectual barrier to entry for adoption of Linux wherever it could be used, which is anywhere, as far as flexibility of the OS is concerned.

  11. Re:Where can I get a decent mac? on Mac OS X Reaches First Birthday · · Score: 2

    If the price of flat panels and memory went up, why didn't the iBook and TiBook line increase in price along with the iMac?

  12. OS X? on Multiple Monitors for Linux Laptops? · · Score: 2

    Have anyone looked at OS X's multiple display features? OS 9 was great and I would hate to think Apple would drop the ball after getting it right, better than any othe implementation I've seen.

  13. Re:apple :) on Most Outrageous Vendor Lie Ever Told? · · Score: 2

    My Apple IIe lasted 17 years... The drive died without a replacement to be found anywhere. I tried and tried to boot it, it booted once more. Into a game I played on it for 17 years, StarMaze. The power went out 4 months later and it never booted again. I made it to seventh level on a fluke. I had never made it past fifth in 17 years of play. I never finished it. I don't think anybody ever did. I found a rom of it, and it played just the same. except the axis contol of the joystick was off. An no joystick has ever come close to the feel of the Mach III.

  14. Re:Left hand on Apple Wants Your Input · · Score: 2

    So, you own a bunch of crap apples and x86 machines (SE/30, 7500/100, SE SuperDrive, Centris 610, 6100/66, LC, 190cs, LCIII, 637CD, 233MHz Pentium, 166MHz Pentium, 533MHz Pentium III, Dell Latitude 4100T, 33MHz 486dx, Apple IIe). Funny, I don't see anything on that list that runs OS X, or even OS 9... why did you switch to mousing lefty? Is the superdrive in the SE a DVD Burner? he hehe he harr har heh.

  15. Re:apple :) on Most Outrageous Vendor Lie Ever Told? · · Score: 2

    I have a nice Powerbook 1400 with a G3, thank you class action. I also have a few LC 574s, with processor upgrades (PPC 603), that I recieved the option to purchase after a class action suit against Apple. My $150 times three machines bought me a factory Mac technicians time for six full eight hour days. One machine never did work, which Apple replaced with a new 5200, with monitor. Apple's promises have cost them plenty, including my loyalty. Now I Post lots of intelligent comments to slashdot, just so I can post Apple flames at +2.

  16. Re:Left hand on Apple Wants Your Input · · Score: 2

    I have a huge list of mac caveats. This is just one that seems like it should have a simple solution that I think Apple should address since they are asking. I made the same argument with microsoft's great mouses, that did not fit in a left hand comfortably. At the time, Logitech's mice were asymetrical, and accounted for exactly 11% marketshare. Not to say I had anything to do with it, but the symetrical intellimouse explorer was released to market very shortly after I sent them my comment. I have since purchased two of them for various computers.

    This is not a flame against Mac OS, They asked for conmments concerning what would make me consider a purchase. While I would still have huge reservations, I would consider their incorperating some flexibility into the Mac user interface a shift in their obvious bent toward considering us all sheep, "we own the hardware and the OS and you will like"

  17. Re:I've no problems on Apple Wants Your Input · · Score: 2

    How do you bind a mouse button in mac OS globaly, assuming you have a multi-button mouse? This is not something you normally find in the control panels, except for binding the function keys. I have never tried multibutton mouses on macs because of the generaly poor opinion I've read concerning their use. I understand that since Mac OS is not designed for them, their use is generally cludgy.

  18. Re:Why not ask the real question...? on Apple Wants Your Input · · Score: 1

    Ias yoaur "Athalon" reaally faast? Perahaps yoaur neaw iMaac wiall bae fasater..

  19. Left hand on Apple Wants Your Input · · Score: 2, Interesting

    Ever try Apple's hot key combo's if you are left handed?

    I use the mouse in my left hand. The hot keys cannot be comfortably done with the right hand.

    PCs are left hand friendly because the functions accessed with hotkeys on an apple are accessed by right clicking a PC. Ever try the on a mac with your right hand?

    Crossover Problems:

    Command+z
    Command+c
    Command+v
    Command+x

    Crossover and Hand position:

    Command+w,+a
    Command+Shift+3
    Command+Option+Es cape
    Command+y
    Command+Shift+1 (one)
    Command+Shift+0 (zero)
    Command+e
    Command+Option+w

    Nothing like alienating 11% of potential customers when you only have 3% of the market.

  20. apple :) on Most Outrageous Vendor Lie Ever Told? · · Score: 2

    "fearsomely fast Power Mac G4 squarely in the lead as the ultimate high-end graphics workstation"

    "Graphics performance is off the charts

    "The dual 1GHz Power Mac G4 is an astonishing 72 percent faster than the fastest PC on the market

    "The PowerPC G4 with Velocity Engine -- the chip that put supercomputing power on the desktop with the original Power Mac G4"

    ha.. ha haa hoo HOO HAA ha haa!

  21. Re:best lie on Most Outrageous Vendor Lie Ever Told? · · Score: 2

    Mine got me laid.. um really, take it from someone who SELLS them! An AMD haxor 'puter WILL GET YOU LAID. You will be so leet!

  22. Re:sounds fair on Apple @ MacWorld Tokyo · · Score: 2

    Suffice to say there are serious flaws in every previous version of mac OS. I have seen every flaw I described many, many times. Apple has a history of not fixing bugs until their next hardware release. Buy the new hardware, fix the bugs. New versions of Mac OS run like a dog on old hardware so, there are are no bug fixes for the hardware you paid too much money for, ever. If you want the bugs fixed, you have to fork over for new hardware. That was their policy and hook for upgrade. You are in that trap now. OS X still has flaws. The flaws will not be fixed. They took a year to fix the most obvious annoyances. The most severe annoyances will be fixed at about 10.6, which will not run on the hardware you have purchased. You will have to purchase new hardware or live with the bugs.

    On another note, the version of "free" ssh included in OS X is not licenced for commercial use, as you already know. But that doesn't matter anyway because no USB to Serial devices currently have drivers for mac OS X. So, you may have downloaded an SSH client for OS 9 or did a BSD God trick of writing drivers on the spot, but I really fucking doubt it.

    You might consider reasearch before you post since you do not seem to have any real experience on the platform and your only anecdotal eveidence is an obvious fabrication. Go back to hacking on your junior high school's iMacs.

    Have a nice Day! :)

  23. Re:Cost and Uses on Conductive Concrete Offers Building Security · · Score: 2

    Electric heat costs 2-3 times as much as gas. Ok if you make 2-3 times as much money and like walking barefoot to the kitchen at night to munch Oreos without waking your wife wit "Ooh, ooh, ahh, cold floor! cold floor!"

  24. Any cheap old hardware. on Comments on USB-Equipped Ethernet Print Servers? · · Score: 2

    Get an old p166 box and load it up... simple.

  25. And the slashdot comments? on Google Relists Operation Clambake · · Score: 5, Interesting

    So, Slashdot is making money now right? So repost the comments you were forced to remove. Let them litigate on two fronts.