Look here. I've used WSPR to send a small message from Richmond, VA to New Zealand using a 0.1 Watts on 30m (about 10.1 MHz). Dr. Taylor is a weak signal nut, and has done an amazing job of creating modulation schemes that work well for a lot of very weak signal scenarios. Want to bounce signals off of the ion trails left by meteors that are so small you can't even see them? Done - it's called FSK441.
His newest JT9-x schemes can detect signals 40 dB _below_ the noise floor - that's 1/10,000th the noise power. Amazing, really, and all it takes is a radio and a PC with a soundcard.
Keep an eye on www.dxmaps.com and when you see QSOs near you, fire up your 6m rig using your HF antenna. I've worked over 100 grid squares using a 756 PRO, 100W and my multiband HF dipole (that isn't cut for 6m) and is only 15 feet off the ground. If your rig has an antenna tuner, I bet it can find a match for 6m. I think part of why I can load up that antenna is that the coax is so bad it presents enough raw resistance so that the SWR is under 3:1 regardless of the actual antenna impedance!
I think the tractor trailer inspection stations have the option of testing the fuel. There are detection kits for that very purpose. They put so much dye in that it's visually detectable at dilutions of 100:1 with undyed diesel.
You are trying to simultaneously believe that there are no known threats and that the newspaper is so terrified that they hired armed guards to protect them.
I see no cognitive dissonance. The mainstream media is no longer a passive part of the political process - they have agendas and I believe that part of this paper's agenda is to turn public opinion against lawful gun owners. Manufacturing threats and whining about needing armed guards accomplishes their purpose quite nicely.
I'm an amateur radio operator, and have a decent understanding of the interference issue. I don't have a problem with 'airplane mode' for intentional radiators - I like to play games on my phone as much as the next guy. I don't have a problem with leaving all devices off and stowed under FL100 either. They're more of a safety hazard as possible projectiles and as distractions to crew instructions than as incidental radiators.
I DO NOT EVER, however, want to see cell phone calls allowed on planes. It's not a technical issue; it's a civility and air rage issue. Do you really want to see your seatmate (that's already taken over both armrests and is wearing WAY too much aftershave) shouting banalities into his phone the whole flight? I didn't think so. If they had a sealed-off room about the size of a lavatory that was the designated cell phone usage area I'd be ok with that. Texting would be ok as long as the alert tone was muted. I wouldn't want to be subjected to hours of a planeload of 'bloo-bloo-bloop' or 'woo-hoo' wolf whistles every time little Johnny or Sally sent/got a msg.
Back in the 80s and 90s I used to fly with my tape or CD player. I was hardly alone in listening to music during takeoff and landing. You think we know less about shielding now than 20-30 years ago?
Both of your examples are classified as "Incidental Radiators" by the FCC. They have rather stringent emission limits across the whole EM spectrum. The troublesome items are "Intentional Radiators" such as cell phones, etc. Things that are _designed_ to emit RF. They are also regulated, but are allowed (obviously) to emit a _much_ higher level of RF at their operating frequencies.
They even restrict radio receivers due to the possibility of IF leakage.
That is how I was able to use my 2m (144 MHz) amateur radio while in my friend's airplane. It was a GA Piper Cherokee and we were VFR, so we were good under a(1) and a(2). We tested the radio on the ground and determined that it didn't interfere with any of his required instruments (basically the compass under VFR). There's also an FCC rule re: this in the Amateur regs (Part 97) - I had to have it on an independent power source (a gel-cell).
It's pretty cool to add the 'aeronautical mobile' suffix to your call.:-)
PLEASE - let's not have any more articles from medicaldaily.com until they stop firing off 2 OR MORE auto-playing videos at the same time on every article.
I'm as liberal as they come.... There is a line that you simply do not cross. You don't... [examples deleted]"
Congratulations - I don't think you're as liberal as you claim. What you're talking about is respect and sympathy for the victim, which is something most liberals forget about while trying to apologize for the perpetrator.
Not in the least. I've been in the 'core' of a couple of small research-grade swimming pool reactors (including this one), and you can see the blue light quite well and with no danger from radiation.
Slashdot Mirror
American speedometers already have both scales - mph and km/hr.
IIRC laser beam divergence is often specified in mrad.
"Like all electromagnetic beams, lasers are subject to divergence, which is measured in milliradians (mrad) or degrees."
Look here. I've used WSPR to send a small message from Richmond, VA to New Zealand using a 0.1 Watts on 30m (about 10.1 MHz). Dr. Taylor is a weak signal nut, and has done an amazing job of creating modulation schemes that work well for a lot of very weak signal scenarios. Want to bounce signals off of the ion trails left by meteors that are so small you can't even see them? Done - it's called FSK441.
His newest JT9-x schemes can detect signals 40 dB _below_ the noise floor - that's 1/10,000th the noise power. Amazing, really, and all it takes is a radio and a PC with a soundcard.
Bob,
Keep an eye on www.dxmaps.com and when you see QSOs near you, fire up your 6m rig using your HF antenna. I've worked over 100 grid squares using a 756 PRO, 100W and my multiband HF dipole (that isn't cut for 6m) and is only 15 feet off the ground. If your rig has an antenna tuner, I bet it can find a match for 6m. I think part of why I can load up that antenna is that the coax is so bad it presents enough raw resistance so that the SWR is under 3:1 regardless of the actual antenna impedance!
See you on the air! 73 de k4det
I think the tractor trailer inspection stations have the option of testing the fuel. There are detection kits for that very purpose. They put so much dye in that it's visually detectable at dilutions of 100:1 with undyed diesel.
Campbell's Condensed Tomato Soup.
...if I flash my sidearm...
You realize that brandishing a weapon is a crime in and of itself in many states? Here's an ironic twist - A DC-based reporter was investigated for allegedly 'brandishing' an illegal high capacity magazine while taping an episode of 'Meet The Press'.
Pick any three liberal pro-gun-ban politicians. They all have armed guards, whether they're the secret service, the police, or private security. Here's an article that states Dianne Feinstein, author of the 1994 'assault' weapons ban has a concealed carry permit.
You are trying to simultaneously believe that there are no known threats and that the newspaper is so terrified that they hired armed guards to protect them.
I see no cognitive dissonance. The mainstream media is no longer a passive part of the political process - they have agendas and I believe that part of this paper's agenda is to turn public opinion against lawful gun owners. Manufacturing threats and whining about needing armed guards accomplishes their purpose quite nicely.
I'm an amateur radio operator, and have a decent understanding of the interference issue. I don't have a problem with 'airplane mode' for intentional radiators - I like to play games on my phone as much as the next guy. I don't have a problem with leaving all devices off and stowed under FL100 either. They're more of a safety hazard as possible projectiles and as distractions to crew instructions than as incidental radiators.
I DO NOT EVER, however, want to see cell phone calls allowed on planes. It's not a technical issue; it's a civility and air rage issue. Do you really want to see your seatmate (that's already taken over both armrests and is wearing WAY too much aftershave) shouting banalities into his phone the whole flight? I didn't think so. If they had a sealed-off room about the size of a lavatory that was the designated cell phone usage area I'd be ok with that. Texting would be ok as long as the alert tone was muted. I wouldn't want to be subjected to hours of a planeload of 'bloo-bloo-bloop' or 'woo-hoo' wolf whistles every time little Johnny or Sally sent/got a msg.
Back in the 80s and 90s I used to fly with my tape or CD player. I was hardly alone in listening to music during takeoff and landing. You think we know less about shielding now than 20-30 years ago?
Both of your examples are classified as "Incidental Radiators" by the FCC. They have rather stringent emission limits across the whole EM spectrum. The troublesome items are "Intentional Radiators" such as cell phones, etc. Things that are _designed_ to emit RF. They are also regulated, but are allowed (obviously) to emit a _much_ higher level of RF at their operating frequencies.
They even restrict radio receivers due to the possibility of IF leakage.
Unless everyone knew how to focus their devices interference toward the cockpit ...
You mean exactly what happens when you have EM radiators inside a waveguide, like an aircraft fuselage?
That is how I was able to use my 2m (144 MHz) amateur radio while in my friend's airplane. It was a GA Piper Cherokee and we were VFR, so we were good under a(1) and a(2). We tested the radio on the ground and determined that it didn't interfere with any of his required instruments (basically the compass under VFR). There's also an FCC rule re: this in the Amateur regs (Part 97) - I had to have it on an independent power source (a gel-cell).
It's pretty cool to add the 'aeronautical mobile' suffix to your call. :-)
I want to know who killed Kennedy. And a pony.
I doubt whoever killed Kennedy also killed a pony.
The USA banned automatic rifles in 1934, and they have been illegal ever since.
It would be more accurate to say that the federal government put very tight restrictions on the ownership of fully-automatic weapons.
a Beta particle is free neutron
Beta is a free electron, not a neutron. As the GP said, X-Rays and gamma rays are both electromagnetic in nature.
These slipped past ad block pro. Usually I don't see them either. I'll have to look around.
These slipped past ad block pro. Usually I don't see them either.
Perhaps the nickel was present and widely distributed pre-methanosarcina explosion, and they 'ate' it all, so there's little left now.
PLEASE - let's not have any more articles from medicaldaily.com until they stop firing off 2 OR MORE auto-playing videos at the same time on every article.
Gaelic or Welsh? It sure looks like the street signs in Wales and the Highlands of Scotland. Canna read 'em.
I'm as liberal as they come. ... There is a line that you simply do not cross. You don't ... [examples deleted]"
Congratulations - I don't think you're as liberal as you claim. What you're talking about is respect and sympathy for the victim, which is something most liberals forget about while trying to apologize for the perpetrator.
... it still couldn't be used because it's still nuclear.
Don't tell them that most smoke detectors are 'nukular' - they'll try to ban those, too, even though they save thousands of lives/yr.
Not in the least. I've been in the 'core' of a couple of small research-grade swimming pool reactors (including this one), and you can see the blue light quite well and with no danger from radiation.
For Cherenkov Radioation , doesn't the charged particle have to move through a dialectic medium, not above its surface?
I don't think the charges use spirit guides to exchange logical arguments to resolve disagreements.