A good regulated power supply will provide well regulated filtered (low ripple, low noise) power to the load. So far it sounds like not a sorce of noise. Now add a load that (extreme example) feeds a switching power supply (CPU regulator for example) that has some failed input filtering. The chopped (by the regulator in switch mode) current has no filtering until it reaches the filtering in the output of the power supply. So in this example, the chopped current draw would have a matching magnetic field (current and magnetic field are directly related). This is the source of the radiated EMI off the DC power leads.
If if a device's current draw is fluctuation enough to cause RF propagation the device needs to be replaced, not sheild the DC transmition cables.
Very true, but most of us don't know how noisy our load is. All we notice is when the glitches cause unexpected lock-ups and crashes. Not radiating the noise into the read amplifiers of the hard drive may make a marginal system into a solid system.
I don't know if it's urban legend or not, but the Club in the US is made of high carbon steel, not the easy to bend stuff. I've heard of stories (maybe not true) that they could be broken by chilling with electronics freeze spray to where it becomes brittle. A good strike with a ball peen hammer could then shatter the hardened shell over the lock.
Web article is here;
http://www.totse.com/en/bad_ideas/locks_and_secu ri ty/killclub.html
I knew a radio operator that had an amplifier that used a seprate 1500 volt power supply. The vehicle was locked and the equipment was properly marked Danger High Voltage and Lock out remote power supply before servicing. Because it was properly marked and locked, the judge threw out the manslaughter case against the amature radio operator by the family of the deceased. You shouldn't try cutting 1.5KV cables with a pocketknife when the supply is still on.
It's not as bad in my car. The Hybrid battery is only 264 volts nominal and the 1KW inverter is 120 volts. I don't recommend messing with either while the power is on. The inverter is on most of the time. I plug the computer into it to charge batteries while on the road. I seldom bother to shut it off since its nominal unloaded draw is just a few mA.
The very term "broadcasting your IP address" is pure, unadulterated BS.
I should have been clear that I know that. My post was tongue in cheek. I know I have to have a valid return for all my web page requests. My post was more along the way of if you want to tap into a switch and monitor all my traffic, I won't be using the same IP the next time I log on, so capturing all the bits to and from 242.198.56.224 would be of limited use.
stop the computer from broadcasting its IP address everywhere
It just doesn't matter. I'm on dial-up so I get a new IP address several times a day. I'm using an Actiontech dual PC modem, so my modem has a firewall much like a broadband router. My PC's addresses are all in the 192.168.x.x. The modem is something diffrent each time I connect.
Is that being paranoid enough or is that just good computing pratice?
Register, and don't read it. The companies will see this in their traffic stats and realize that registration effects readership reach. They are after all driven by the number of eye balls that grace their sites.
The best way to do that is to have a very short term memory. Get a new registration everyday and never re-use it. The soon would have a full database of one time visitiors.
I know, There was a big write-up on bogus Google clicks, either to raise one's page rank, or to suck up a competitor's advertising budget. It has it's problems, but for the end user, it's useful, and for the advertiser, it's where the eyeballs are. Simply put, If you are looking for a bit of information such as a videogame hack or IC pinout, where is the first place you do a search? For most people, it's Google. Google can't become lazy. They can make the mistake of stagnation (like IBM did).
Some investors were thinking Lyco was the beginning of Google as a portal. Unfortunately for Lycos, they aimed for advertisers dollars instead of providing consumer satisafaction. They lost the consumers as Google showed them how it's done. Even while Google was growing and passing Yahoo and AOL, Lycos didn't get a clue and thought more and bigger ads = more revenue. They missed the important step of obtaining market share. Oops!
On another note, I wonder if MS is going to be too overloaded and advertisement heavy in their new search engine. Are they going to take a page from Google? Are they going to try to embrace and extend IE to lock in users to the MS search? Will such a miss-step drive more users to vendor agnostic browsers other than IE?
It'll be fun to watch the MS attempt. Somehow I see it being driven by the same playbook as the X-box. A big money sink the first few years to get it linked into everything and then the advertising and paid content kicks in (tied to MS version of i-Tunes for example).
I see the web being diveded into the MS stuff and the rest of the WWW much like AOL and the Internet. MS will index partners and Google will index the rest of the web including all the good indie, OSS, and counter-culture stuff.
Win 98 lite will probably not show up in a MS search for windows speed enhancements.
I modded u flaimbait cause that isn't true. The Pentium M is comparable performance to the P4.
I thought the Pentium is out in speeds up to 3.4 Gigahertz. I thought the desktops 3.4GHZ and mobile chips running at up to 2.0GHZ would have been informative, not flaimbait. I guess I unintentionaly started a flame war and so my first comment is flamebait.
A clip from the Intel site regarding the Pentium M..
Processor, Intel® Pentium® M Processor.... Architecture, 90 nm, 130 nm process technology, 130 nm process technology. L2 Cache, 2MB, 1MB, 1MB. Clock Speed, 1.50 to 2 GHz,...
What I don't understand is why more people aren't building Pentium M desktops.
Um, It's the Mobile processor. As such, it's designed to use less power by running at lower voltage and lower speeds, especialy when running on batteries. Why pay extra for a chip that runs slow, and by design slows down on battery power? The Pentium M is a speedy chip, but not at the speeds of the desktop chip. Take a regular Pentium and underclock it if you want to save heat and power.
Another database would be the list of stuff that you wouldn't consider buying because of legal threats.
I found some stuff as MIDI files which gave credit to the author and songwriter. I liked the MIDI file. I looked to see if they had more than one good song. I found a bunch of take down notices where the label had sent cease and desist letters (the websites displayed the letters). Since this was the only contact I had with the artist (MIDI file only, not original performance) I had no idea whether their performance was any good. I've never heard him on the radio. Lawyers of the label shut down their free advertising.
I figured out they didn't want me to hear it. I never was exposed to it other than as a MIDI. (Original is a French artist on Griffin label) Their legal action killed any interest in persuing finding the artist's material. Sorry you felt that way about MIDI files.. The music might have been worth looking into, but not after the way the fan's promoting the music were treated. I now no longer care if your album has more than 2 tracks, one good one and the other one.
To this day, I still no longer buy any Griffin label.
"But I can buy that exact same drive for about $75 online - don't you think that $120 is a little expensive?"
Hmm.. Less than twice the price.. I can do better..
Lost a set of keys for my car. The dealer wanted about $40 for the key and over $150 for the remote.
Found the keys online for $18 + S & H (had them cut localy for $1.00 each) and the remote was $28.00 each + S & H.
All in all getting one key and one remote from the dealer would have been about $200 and getting 2 keys and 2 remotes online was about half that total that including S & H. I got twice as much for half the price.
Do you charge 10 dollars more then your competitor to have a cablein the box? Considering the odds are that the person purchasing your printer already has a cable, then no.
Why would you want a printer cable when more useful connection options are plentiful?
I use print servers. They attach right to the back of the printer. I don't need a cable except for a network cable. Shameless plug.. I love the Hawking print servers.
I never worry about having a long enough printer cable for wherever I want to place my printer. I just use a CAT5 and can place the printer anywhere, including the shelf in the coat closet where the 3 year old can't store crayons in it. Placing a printer on a LAN enables sharing the printer even when a PC is off. I no longer attach my printers to computers, I LAN attach instead. In the bulk bin, the Cat 5 cables are much cheaper than either USB or Centronics cables costing only $2-3. Also there is no problem if you want a really long cable for some reason. Try finding a 50 foot Centronics cable...;-) With a wireless access card, I can use the laptop entirely wireless, including internet and printing. On the road I use the laptop with a crossover cable to the print server. It frees the USB port for the camera or USB memory thumb drive. No need to bring a bulky cable with huge ends.
You will find it's a vacuum tube. It has a cavity and is used like a magnitron to create microwaves. On most of them, the cavity contains metal bellows. This enables tuning it over a small range. Small ones were used for tuning the local oscillator in radar sets in the receiver. Tuning a 20,000 watt one to the WiFi band could not only disrupt the competition by jamming the band, but could overload and cook much of the low power stuff in the area.
Maybe he wants to DOS the contest.
To win the contest, he needs to establish a 2 way link. He can't win by blasting a one way signal.
Yes, it is quite likely that you don't know much about satellites and their orbits.
Umm, Geostationary satellites are positioned over the equator and not reachable from the poles. Any other orbit would cross the equator and would not be in a poar region 100% of the time. What part of the orbits did he not know?
It made sense to me. A geostationary satellite over the North pole either would not be stationary and be on a polar orbit visiting both the north and south poles (Synchrnous polar orbit) or would simply fall down due to gravity since it wasn't orbiting at all.
Now if you could link to a swarm of satellites with orbits like the GPS system, then there is a chance of 24 hour coverage.
Wouldn't it be great if Google went took some of that IPO money and ended this whole fiaSCO? Google is one if not the biggest Linux house there is. With SCO's stock price down it would chump change for google.
Wouldn't it be even better if Google simply waited till the stock was at 0.30 a share instead of over $3.00 a share? They don't want to overspend, but just pay close to what it's worth.
when you need the bathroom and dont want to miss what your watching,
Since I just have over the air TV, finding time to visit the restroom is not a problem as most breaks are at least 4 minutes each. I have time to use the restroom, wash my hands and face, and make a 2 minute bag of microwave popcorn before the commercials are over.
30 seconds after entering the cloud you'll definately start having an "uh-oh" moment as the G's and airspeed build mysteriously on their own...
I forgot to mention in my other reply, in addition to watching the altimiter, watch the compass. If the altimiter, airspeed and compass don't start getting twitchy, you should be OK. Beware of pilot incuded ocillations. It can make a bumpy ride if you try too hard to maintain elevation within a couple feet. Relax and maintain even pressure in your seat, then watch the altimiter. Your butt should tell you first you are starting to bounce.
Throwing out the baby with the bath water is the best description of the RIAA and MP3's.
There are always going to be people using MP3s legitimately, though the RIAA doesn't see MP3 players as being anything but tools for stolen property.
Too bad the RIAA is bent on killing the most used compressed format. If the MPAA wants to sell movies, they know to sell them in VHS and DVD.
The RIAA has no interest in releasing high quality MP3's, that will play in my living room (DVD player plays MP3's) in my car (MP3/CD jukebox) or at the gym (CD/MP3 player). They are only interested in selling tunes at low bitrates that can be played only on the PC that downloaded it, and/or on a propritory player. Sorry guys. If I can't play it wherever I am, I won't buy it. I have yet to find a DVD player, portable CD, and car CD player that will play the same encrypted music file that most sites try to sell online.
Maybe in a few years, Panasonic will make a portable CD MP3 player that will play content from i-Tunes and Napster. Maybe Kenwood and Pioneer will make the same for my car. Maybe Mitsubishi will make a DVD that will play them also. In the mean time, the RIAA is selling content that's not compatable with my playback devices. The MPAA knew enough to release movies on VHS. The RIAA would rather throw out sales of usable high quality MP3's in the MP3 format in the war on piracy. I'm missing that kid the RIAA tossed out with the bathwater.
I made the mistake once at apart time job in a movie house of jacking a protable CD player into the sound system so there would not be dead silence during intermission. I didn't know. The owner found out and let me know what liability it opened. Oops. We went back to silent intermissions. The guys at the snack bar were not pleased as the lobby was wired also. (It was all very nicely pre-wired ready for sound)
The consessions people went back to a single 2 speaker self contained radio (boom box) to properly present the music industry's product as it was meant to be heard (tonge in cheek). Using a boom box behing the counter seems to be legal.
No wonder nobody buys CD's anymore. Nobody hears the good ones in public.
It doesn't seem all that difficult, and looks like it could add a whole lot to the discussion.
Like goatse links... That's why I don't put in an easy link. Some usere are stuck with IE at work and get trolled into sites that may be grounds for dismissal. At least my links are honest even if you have to cut and paste yourself.
GPS and topos are good, but you'd also better have some referrence to the horizon, or in about 30 seconds after entering the cloud you'll definately start having an "uh-oh" moment as the G's and airspeed build mysteriously on their own...
The Altimiter and altitude reading on the GPS are your friend. Learn to use them and trust them. They should respond before you start getting a large mysterious airspeed increase.
Slashdot Mirror
DC power going to generate EMI?
The short answer is it depends on the load.
A good regulated power supply will provide well regulated filtered (low ripple, low noise) power to the load. So far it sounds like not a sorce of noise. Now add a load that (extreme example) feeds a switching power supply (CPU regulator for example) that has some failed input filtering. The chopped (by the regulator in switch mode) current has no filtering until it reaches the filtering in the output of the power supply. So in this example, the chopped current draw would have a matching magnetic field (current and magnetic field are directly related). This is the source of the radiated EMI off the DC power leads.
If if a device's current draw is fluctuation enough to cause RF propagation the device needs to be replaced, not sheild the DC transmition cables.
Very true, but most of us don't know how noisy our load is. All we notice is when the glitches cause unexpected lock-ups and crashes. Not radiating the noise into the read amplifiers of the hard drive may make a marginal system into a solid system.
I don't know if it's urban legend or not, but the Club in the US is made of high carbon steel, not the easy to bend stuff. I've heard of stories (maybe not true) that they could be broken by chilling with electronics freeze spray to where it becomes brittle. A good strike with a ball peen hammer could then shatter the hardened shell over the lock.
u ri ty/killclub.html
Web article is here;
http://www.totse.com/en/bad_ideas/locks_and_sec
I knew a radio operator that had an amplifier that used a seprate 1500 volt power supply. The vehicle was locked and the equipment was properly marked Danger High Voltage and Lock out remote power supply before servicing. Because it was properly marked and locked, the judge threw out the manslaughter case against the amature radio operator by the family of the deceased.
You shouldn't try cutting 1.5KV cables with a pocketknife when the supply is still on.
It's not as bad in my car. The Hybrid battery is only 264 volts nominal and the 1KW inverter is 120 volts. I don't recommend messing with either while the power is on. The inverter is on most of the time. I plug the computer into it to charge batteries while on the road. I seldom bother to shut it off since its nominal unloaded draw is just a few mA.
The very term "broadcasting your IP address" is pure, unadulterated BS.
I should have been clear that I know that. My post was tongue in cheek. I know I have to have a valid return for all my web page requests. My post was more along the way of if you want to tap into a switch and monitor all my traffic, I won't be using the same IP the next time I log on, so capturing all the bits to and from 242.198.56.224 would be of limited use.
stop the computer from broadcasting its IP address everywhere
It just doesn't matter. I'm on dial-up so I get a new IP address several times a day. I'm using an Actiontech dual PC modem, so my modem has a firewall much like a broadband router. My PC's addresses are all in the 192.168.x.x. The modem is something diffrent each time I connect.
Is that being paranoid enough or is that just good computing pratice?
Register, and don't read it. The companies will see this in their traffic stats and realize that registration effects readership reach. They are after all driven by the number of eye balls that grace their sites.
The best way to do that is to have a very short term memory. Get a new registration everyday and never re-use it. The soon would have a full database of one time visitiors.
I know, There was a big write-up on bogus Google clicks, either to raise one's page rank, or to suck up a competitor's advertising budget. It has it's problems, but for the end user, it's useful, and for the advertiser, it's where the eyeballs are. Simply put, If you are looking for a bit of information such as a videogame hack or IC pinout, where is the first place you do a search? For most people, it's Google. Google can't become lazy. They can make the mistake of stagnation (like IBM did).
Some investors were thinking Lyco was the beginning of Google as a portal. Unfortunately for Lycos, they aimed for advertisers dollars instead of providing consumer satisafaction. They lost the consumers as Google showed them how it's done. Even while Google was growing and passing Yahoo and AOL, Lycos didn't get a clue and thought more and bigger ads = more revenue. They missed the important step of obtaining market share. Oops!
On another note, I wonder if MS is going to be too overloaded and advertisement heavy in their new search engine. Are they going to take a page from Google? Are they going to try to embrace and extend IE to lock in users to the MS search? Will such a miss-step drive more users to vendor agnostic browsers other than IE?
It'll be fun to watch the MS attempt. Somehow I see it being driven by the same playbook as the X-box. A big money sink the first few years to get it linked into everything and then the advertising and paid content kicks in (tied to MS version of i-Tunes for example).
I see the web being diveded into the MS stuff and the rest of the WWW much like AOL and the Internet. MS will index partners and Google will index the rest of the web including all the good indie, OSS, and counter-culture stuff.
Win 98 lite will probably not show up in a MS search for windows speed enhancements.
sure that will stop it from crashing
h tm
If you don't want it to crash, check out this page. Windows and sunshine go together.
http://perso.wanadoo.fr/ballonsolaire/en-index.
You might want to use the fish.
OK, I'll bite...
... Architecture, 90 nm, 130 nm process technology, 130 nm process technology. L2 Cache, 2MB, 1MB, 1MB. Clock Speed, 1.50 to 2 GHz, ...
r s/ pentiumm/
I modded u flaimbait cause that isn't true. The Pentium M is comparable performance to the P4.
I thought the Pentium is out in speeds up to 3.4 Gigahertz. I thought the desktops 3.4GHZ and mobile chips running at up to 2.0GHZ would have been informative, not flaimbait. I guess I unintentionaly started a flame war and so my first comment is flamebait.
A clip from the Intel site regarding the Pentium M..
Processor, Intel® Pentium® M Processor.
URL is here;
http://www.intel.com/products/notebook/processo
I'll try not to flamebait again. It wasn't my objective.
There's always the microwave in the employee breakroom. Guaranteed to destroy small electronics placed within
;-)
I stuck in a spare magnitron I had laying around and it still works fine.
What I don't understand is why more people aren't building Pentium M desktops.
Um, It's the Mobile processor. As such, it's designed to use less power by running at lower voltage and lower speeds, especialy when running on batteries. Why pay extra for a chip that runs slow, and by design slows down on battery power? The Pentium M is a speedy chip, but not at the speeds of the desktop chip. Take a regular Pentium and underclock it if you want to save heat and power.
Another database would be the list of stuff that you wouldn't consider buying because of legal threats.
I found some stuff as MIDI files which gave credit to the author and songwriter. I liked the MIDI file. I looked to see if they had more than one good song. I found a bunch of take down notices where the label had sent cease and desist letters (the websites displayed the letters). Since this was the only contact I had with the artist (MIDI file only, not original performance) I had no idea whether their performance was any good. I've never heard him on the radio. Lawyers of the label shut down their free advertising.
I figured out they didn't want me to hear it. I never was exposed to it other than as a MIDI. (Original is a French artist on Griffin label) Their legal action killed any interest in persuing finding the artist's material. Sorry you felt that way about MIDI files.. The music might have been worth looking into, but not after the way the fan's promoting the music were treated. I now no longer care if your album has more than 2 tracks, one good one and the other one.
To this day, I still no longer buy any Griffin label.
"But I can buy that exact same drive for about $75 online - don't you think that $120 is a little expensive?"
Hmm.. Less than twice the price.. I can do better..
Lost a set of keys for my car. The dealer wanted about $40 for the key and over $150 for the remote.
Found the keys online for $18 + S & H (had them cut localy for $1.00 each) and the remote was $28.00 each + S & H.
All in all getting one key and one remote from the dealer would have been about $200 and getting 2 keys and 2 remotes online was about half that total that including S & H. I got twice as much for half the price.
Do you charge 10 dollars more then your competitor to have a cablein the box? Considering the odds are that the person purchasing your printer already has a cable, then no.
;-) With a wireless access card, I can use the laptop entirely wireless, including internet and printing. On the road I use the laptop with a crossover cable to the print server. It frees the USB port for the camera or USB memory thumb drive. No need to bring a bulky cable with huge ends.
Why would you want a printer cable when more useful connection options are plentiful?
I use print servers. They attach right to the back of the printer. I don't need a cable except for a network cable. Shameless plug.. I love the Hawking print servers.
I never worry about having a long enough printer cable for wherever I want to place my printer. I just use a CAT5 and can place the printer anywhere, including the shelf in the coat closet where the 3 year old can't store crayons in it. Placing a printer on a LAN enables sharing the printer even when a PC is off. I no longer attach my printers to computers, I LAN attach instead. In the bulk bin, the Cat 5 cables are much cheaper than either USB or Centronics cables costing only $2-3. Also there is no problem if you want a really long cable for some reason. Try finding a 50 foot Centronics cable...
haven't the slightest clue what that mean,
Do a Google search for klystron.
You will find it's a vacuum tube. It has a cavity and is used like a magnitron to create microwaves. On most of them, the cavity contains metal bellows. This enables tuning it over a small range. Small ones were used for tuning the local oscillator in radar sets in the receiver. Tuning a 20,000 watt one to the WiFi band could not only disrupt the competition by jamming the band, but could overload and cook much of the low power stuff in the area.
Maybe he wants to DOS the contest.
To win the contest, he needs to establish a 2 way link. He can't win by blasting a one way signal.
Yes, it is quite likely that you don't know much about satellites and their orbits.
Umm, Geostationary satellites are positioned over the equator and not reachable from the poles. Any other orbit would cross the equator and would not be in a poar region 100% of the time. What part of the orbits did he not know?
It made sense to me. A geostationary satellite over the North pole either would not be stationary and be on a polar orbit visiting both the north and south poles (Synchrnous polar orbit) or would simply fall down due to gravity since it wasn't orbiting at all.
Now if you could link to a swarm of satellites with orbits like the GPS system, then there is a chance of 24 hour coverage.
who cares? it's just tv.
Maybe anybody that is paying for it and expect it to work.
Wouldn't it be great if Google went took some of that IPO money and ended this whole fiaSCO? Google is one if not the biggest Linux house there is. With SCO's stock price down it would chump change for google.
Wouldn't it be even better if Google simply waited till the stock was at 0.30 a share instead of over $3.00 a share? They don't want to overspend, but just pay close to what it's worth.
when you need the bathroom and dont want to miss what your watching ,
Since I just have over the air TV, finding time to visit the restroom is not a problem as most breaks are at least 4 minutes each. I have time to use the restroom, wash my hands and face, and make a 2 minute bag of microwave popcorn before the commercials are over.
30 seconds after entering the cloud you'll definately start having an "uh-oh" moment as the G's and airspeed build mysteriously on their own...
I forgot to mention in my other reply, in addition to watching the altimiter, watch the compass. If the altimiter, airspeed and compass don't start getting twitchy, you should be OK. Beware of pilot incuded ocillations. It can make a bumpy ride if you try too hard to maintain elevation within a couple feet. Relax and maintain even pressure in your seat, then watch the altimiter. Your butt should tell you first you are starting to bounce.
Throwing out the baby with the bath water is the best description of the RIAA and MP3's.
There are always going to be people using MP3s legitimately, though the RIAA doesn't see MP3 players as being anything but tools for stolen property.
Too bad the RIAA is bent on killing the most used compressed format. If the MPAA wants to sell movies, they know to sell them in VHS and DVD.
The RIAA has no interest in releasing high quality MP3's, that will play in my living room (DVD player plays MP3's) in my car (MP3/CD jukebox) or at the gym (CD/MP3 player). They are only interested in selling tunes at low bitrates that can be played only on the PC that downloaded it, and/or on a propritory player. Sorry guys. If I can't play it wherever I am, I won't buy it. I have yet to find a DVD player, portable CD, and car CD player that will play the same encrypted music file that most sites try to sell online.
Maybe in a few years, Panasonic will make a portable CD MP3 player that will play content from i-Tunes and Napster. Maybe Kenwood and Pioneer will make the same for my car. Maybe Mitsubishi will make a DVD that will play them also. In the mean time, the RIAA is selling content that's not compatable with my playback devices. The MPAA knew enough to release movies on VHS. The RIAA would rather throw out sales of usable high quality MP3's in the MP3 format in the war on piracy. I'm missing that kid the RIAA tossed out with the bathwater.
I made the mistake once at apart time job in a movie house of jacking a protable CD player into the sound system so there would not be dead silence during intermission. I didn't know. The owner found out and let me know what liability it opened. Oops. We went back to silent intermissions. The guys at the snack bar were not pleased as the lobby was wired also. (It was all very nicely pre-wired ready for sound)
The consessions people went back to a single 2 speaker self contained radio (boom box) to properly present the music industry's product as it was meant to be heard (tonge in cheek). Using a boom box behing the counter seems to be legal.
No wonder nobody buys CD's anymore. Nobody hears the good ones in public.
It doesn't seem all that difficult, and looks like it could add a whole lot to the discussion.
Like goatse links... That's why I don't put in an easy link. Some usere are stuck with IE at work and get trolled into sites that may be grounds for dismissal. At least my links are honest even if you have to cut and paste yourself.
GPS and topos are good, but you'd also better have some referrence to the horizon, or in about 30 seconds after entering the cloud you'll definately start having an "uh-oh" moment as the G's and airspeed build mysteriously on their own...
The Altimiter and altitude reading on the GPS are your friend. Learn to use them and trust them. They should respond before you start getting a large mysterious airspeed increase.