A signal with a wavelength of 1 meter would be a bit below 300 MHz, which is nowhere near the visible spectrum.
Laser wavelengths are typically specified in NANOMETERS.
, so it's completely useless for "putting people in space to work on the equipment". As cool as Rutan's craft is, it is NOWHERE near what you need to do useful work in space.
There could be a Dextro- (d) or Levo- (l) if you were talking about a single optical isomer. AFAIK, the plant produces a racemic mixture. "Delta-9-THC" is a simplified name. The full IUPAC name would be Tetrahydro-6,6,9-trimethyl-3-pentyl-6H-dibenzo[b,d ]pyran-1-ol
"Cable TV doesn't involve radio waves broadcast through the air (it involves radio waves channeled through a cable.) The FCC regulates radio waves broadcast, so in theory they could go after satellite TV if they wanted to."
The signals only come over a cable for the last part of the delivery. With the exception of locally-originated programming (local news/public affairs channel, public access, etc.), all those cable channels (CNN, HBO, Showtime, Comedy Central, etc.) get to your cable provider via SATELLITE. What do you think all those dishes at the local cable office are for?
When AMERICANS run the rape rooms and torture chambers, it provides opportunities to shovel tax money into the private sector to pay for all those "contractors" and "advisors" from DynCorp, CACI, Titan, etc.
http://warprofiteers.com/article.php?id=11285
When the Iraqis did it, all American corporations got to do was sell them weapons...
I do electronics design as a full-time gig, but managed to get an electrician's license, which is a good source of weekend/evening work. Also a hedge against outsourcing, as some guy in Bangalore isn't going to rewire your basement over the phone!:)
Improper plumbing (not installing a backflow preventer where required, for example) can result in waste/sewage entering the municipal water supply system, potentially endangering MANY lives.
Most plumbers also install gas/oil fired heating systems, for which the hazards of improper installation should be obvious. Even an improperly vented gas water heater could kill via CO poisoning....
Get an OLD VHS deck...
on
The VHS is Dead
·
· Score: 2, Informative
Many of the older (mechanical tuner, die cast chassis, top loading) VHS machines have AGC and sync circuitry that seems unfazed by Macrovision encoding. I have an ancient Panasonic PV-1000 that I keep around just for this reason. Short of the occasional drive belt or sensor bulb replacement, the thing just refuses to die. Of course, the fact that the thing originally sold for close to $1000 may have something to do with that. This thing is built like the proverbial "brick shithouse".
In spite of the years of emergency comms support given by the Amateur service, the FCC just approved BPL, which promises to render the entire HF spectrum pretty much unusable.
Re:More than 190 proof
on
Hacking Vodka
·
· Score: 1
No, 100% won't evaporate any faster than 190 proof. In fact, it actually GAINS volume at first, as it absorbs H2O vapor from the air, until it is back to 190 proof again...
Here's a faster way to quiet a furby! :)
on
Apollo 12 at 35
·
· Score: 1
The processes of crystal growth and zone refining of silicon and germanium require induction heating, which is one of the areas where vacuum tubes are still widely used.
Ion implantation equipment used for semiconductor fabrication still uses vacuum tubes, as well.
Not to mention the CRTs in oscilloscopes, and all the other tubes in the test equipment that helped develop and test early semiconductors.
If tubes had never come on the scene, the technologies needed to produce semiconductors never could have been developed...
The silvery spot inside most tubes was barium, not mercury. It reacts with oxygen to form barium oxide, the white powder inside a tube that has "gone to air".
Mercury was used in some tubes, but not the ones you would find in a TV or radio set. Mostly big rectifiers, thyratrons and ignitrons used in transmitters and industrial gear.
Hard borosilicate glasses were commonly used on transmitting and other high powered tubes prior to the advent of ceramic/metal envelopes.
If you want some for a guitar amp, look for the type 6384. This is an ultra-rugged tube originally used for servoamplifiers on ICBMs! With a bit of rewiring, it makes a decent substitute for the 6L6. It has a pyrex bulb, ceramic spacers, and high temperature base.
The board included a DC-DC converter circuit to develop plate voltage for the tube. Quite similar to the circuit used in a photoflash to develop several hundred volts from a battery.
"CH4 + 2H20 -> CO2 + 4H2"
So the production of hydrogen is STILL reliant on a fossil fuel (methane, AKA natural gas), and STILL generates a greenhouse gas (CO2) as a byproduct of the process.
So what is the benefit of going through all the chemistry (and loss of energy density) when you could just run the cars on methane?
"Someone want to explain how the UK TV Nazis can tell if you have an unlicensed TV in your house? Or how a radar detector can be detected?"
The vast majority of radio receivers utilise a system called a "superheterodyne" circuit. In this system, the incoming radio signal is mixed with an internally generated radio signal from a circuit called a "local oscillator" or "LO". Unless special (and costly) design techniques are used, some portion of this LO signal radiates back out the receiving antenna or directly from the receiver circuitry. Because the LO signal frequency is mathematically related to the signal frequency being listened to, someone with a scanning receiver tuned to the LO frequency can know exactly what channel you are listening to/watching. And a highly directional antenna can be used to pinpoint your location.
In the case of TV receivers, other signals are radiated as well, primarily from the horizontal sweep circuitry.
Obviously, a car headlamp is DESIGNED for DC operation, as well as severe vibration. As such, it would have a much shorter, thicker, stiffer filament, and be more resistant to filament notching. Also, the total "accelerating voltage" across the filament structure is only 12 volts, as opposed to 120V or 240V as would be seen in a household lamp. Lower accelerating voltage means less tungsten ion migration.
Slashdot Mirror
A signal with a wavelength of 1 meter would be a bit below 300 MHz, which is nowhere near the visible spectrum. Laser wavelengths are typically specified in NANOMETERS.
It was a damaged heater in a cryogenic O2 tank that caused the explosion that nearly doomed the crew of Apollo 13.
, so it's completely useless for "putting people in space to work on the equipment". As cool as Rutan's craft is, it is NOWHERE near what you need to do useful work in space.
There could be a Dextro- (d) or Levo- (l) if you were talking about a single optical isomer. AFAIK, the plant produces a racemic mixture. "Delta-9-THC" is a simplified name. The full IUPAC name would be Tetrahydro-6,6,9-trimethyl-3-pentyl-6H-dibenzo[b,d ]pyran-1-ol
:)
Try saying THAT after a few bonghits!
"Cable TV doesn't involve radio waves broadcast through the air (it involves radio waves channeled through a cable.) The FCC regulates radio waves broadcast, so in theory they could go after satellite TV if they wanted to."
The signals only come over a cable for the last part of the delivery. With the exception of locally-originated programming (local news/public affairs channel, public access, etc.), all those cable channels (CNN, HBO, Showtime, Comedy Central, etc.) get to your cable provider via SATELLITE. What do you think all those dishes at the local cable office are for?
When AMERICANS run the rape rooms and torture chambers, it provides opportunities to shovel tax money into the private sector to pay for all those "contractors" and "advisors" from DynCorp, CACI, Titan, etc.
http://warprofiteers.com/article.php?id=11285
When the Iraqis did it, all American corporations got to do was sell them weapons...
I do electronics design as a full-time gig, but managed to get an electrician's license, which is a good source of weekend/evening work. Also a hedge against outsourcing, as some guy in Bangalore isn't going to rewire your basement over the phone! :)
Improper plumbing (not installing a backflow preventer where required, for example) can result in waste/sewage entering the municipal water supply system, potentially endangering MANY lives.
Most plumbers also install gas/oil fired heating systems, for which the hazards of improper installation should be obvious. Even an improperly vented gas water heater could kill via CO poisoning....
Many of the older (mechanical tuner, die cast chassis, top loading) VHS machines have AGC and sync circuitry that seems unfazed by Macrovision encoding. I have an ancient Panasonic PV-1000 that I keep around just for this reason. Short of the occasional drive belt or sensor bulb replacement, the thing just refuses to die. Of course, the fact that the thing originally sold for close to $1000 may have something to do with that. This thing is built like the proverbial "brick shithouse".
Just wait until everybody needs to get their damned color TVs off MY FREQUENCY! :)
In spite of the years of emergency comms support given by the Amateur service, the FCC just approved BPL, which promises to render the entire HF spectrum pretty much unusable.
No, 100% won't evaporate any faster than 190 proof. In fact, it actually GAINS volume at first, as it absorbs H2O vapor from the air, until it is back to 190 proof again...
http://www.voltnet.com/humor/furby/index.shtml
who developed the audion in 1906. I guess his brother "Leo" was a few years late by 1922?
vacuum tubes!
The processes of crystal growth and zone refining of silicon and germanium require induction heating, which is one of the areas where vacuum tubes are still widely used.
Ion implantation equipment used for semiconductor fabrication still uses vacuum tubes, as well.
Not to mention the CRTs in oscilloscopes, and all the other tubes in the test equipment that helped develop and test early semiconductors.
If tubes had never come on the scene, the technologies needed to produce semiconductors never could have been developed...
The silvery spot inside most tubes was barium, not mercury. It reacts with oxygen to form barium oxide, the white powder inside a tube that has "gone to air".
Mercury was used in some tubes, but not the ones you would find in a TV or radio set. Mostly big rectifiers, thyratrons and ignitrons used in transmitters and industrial gear.
Hard borosilicate glasses were commonly used on transmitting and other high powered tubes prior to the advent of ceramic/metal envelopes.
If you want some for a guitar amp, look for the type 6384. This is an ultra-rugged tube originally used for servoamplifiers on ICBMs! With a bit of rewiring, it makes a decent substitute for the 6L6. It has a pyrex bulb, ceramic spacers, and high temperature base.
The board included a DC-DC converter circuit to develop plate voltage for the tube. Quite similar to the circuit used in a photoflash to develop several hundred volts from a battery.
The first CRT was invented by Ferdinand Braun, in 1897. http://www.oneillselectronicmuseum.com/page8.shtml
"CH4 + 2H20 -> CO2 + 4H2" So the production of hydrogen is STILL reliant on a fossil fuel (methane, AKA natural gas), and STILL generates a greenhouse gas (CO2) as a byproduct of the process. So what is the benefit of going through all the chemistry (and loss of energy density) when you could just run the cars on methane?
http://www.mapinc.org/drugnews/v98/n809/a07.html
t h. htm
b ie s.shtml
c kb b2.htm
http://www.rationalrevolution.net/crack_baby_my
http://stopthedrugwar.org/chronicle/327/crackba
http://www.druglibrary.org/schaffer/cocaine/cra
It doesn't contain any nitrogen, a primary requirement for alkaloids.
The name of the diet product was spelled "AYDS", IIRC.
"Someone want to explain how the UK TV Nazis can tell if you have an unlicensed TV in your house? Or how a radar detector can be detected?"
The vast majority of radio receivers utilise a system called a "superheterodyne" circuit. In this system, the incoming radio signal is mixed with an internally generated radio signal from a circuit called a "local oscillator" or "LO". Unless special (and costly) design techniques are used, some portion of this LO signal radiates back out the receiving antenna or directly from the receiver circuitry. Because the LO signal frequency is mathematically related to the signal frequency being listened to, someone with a scanning receiver tuned to the LO frequency can know exactly what channel you are listening to/watching. And a highly directional antenna can be used to pinpoint your location.
In the case of TV receivers, other signals are radiated as well, primarily from the horizontal sweep circuitry.
How which phenomenon works "well"?
Obviously, a car headlamp is DESIGNED for DC operation, as well as severe vibration. As such, it would have a much shorter, thicker, stiffer filament, and be more resistant to filament notching. Also, the total "accelerating voltage" across the filament structure is only 12 volts, as opposed to 120V or 240V as would be seen in a household lamp. Lower accelerating voltage means less tungsten ion migration.