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How much watts would a laser beam from Mars have to be, in order to be detectable from Earth?
A typical laser pointer has a 5 milliwatt output. The most powerful laser weapon developed has a 100 kilowatt output.
Detectable by the best telescope in the world or in Earth orbit.
What's the minimum energy output a laser would have to be in order to be detected from Mars?
"Detectable" is a funny thing. If a 1 watt laser (for example) could not be detected with 1 hour of staring, it might be detectable with 10 hours. We can already detect signals carried by just a few 100 photons per second (Lunar Laser Ranging). At the typical distance to Mars, a laser there would have to send about 2.6 x 10^9 photons per second. That's only about 30 nanowatts.
On the other hand, at 20 nanowatts, the information rate would be less than 1 bit per second. The noise from the vibration of the laser (from winds and Mars quakes) would blur the signal so much, the laser would not be detectable any more. Better go up to 20 microwatts, and get about 30 bits per second. Still very slow.
When we bounced radar signals from Earth to Mars and back, we had to stare at Mars for about 30 minutes to detect the return signal.
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Filed under Pro Audio Equipment by on Apr 4th, 2010. Comment. 
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how many dys can a person go w/o any sleep-no naps, nothing. before they would fall into a coma?
i heard something like 60 hours.. i dunno how true that is
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Filed under Pro Audio Equipment by on Apr 3rd, 2010. Comment.
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Check Ebay for Mini Pro products.
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 Pro iPod 1 8 35 Mini Stereo to Dual XLR Male 6ft Cable US $28.95
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How is the JVC Mini DV Pro HD 63 minute compared to the Sony Mini DV HD 63 minute DVM63HD HDV?
I'm talking about MiniDV tapes
Basically the big difference is the size of the particles embedded on the tape itself, and the density of them. Also what lubrication compound used. If you have been using Sony tapes so far, keep using them. The heads on your camera are now coated with that kind of lube, and I have read more than a few times mixing the different manufactures blends can damage the heads. Having said all of that, I use the best, and of course the most expensive tape Sony makes.
Here is their sales pitch...
The New PHDVM63DM has all the advances that you have come to expect from Sony DigitalMASTER™:
Dual Layer of active magnetic material to produce a tape with fewer errors and less dropouts than Mini-DV tape.
30% more Diamond Like Carbon (DLC) coating for a more durable tape
But the PHDVM63DM has been improved especially for the demand of the new HDV recording technology:
A new Advanced Metal Evaporated II (AME-II) technology that uses a greater packing density of magnetic grains for higher output and lower noise. This results in 95% fewer errors and 60% less dropouts compared with Mini-DV tape.
An enforced DLC layer for increased durability with improved headwear and still frame characteristics.
A newly developed lubricant system to reduce friction for optimum stability under a wide range of operating conditions.
Something to consider: Errors and dropouts are hazards that appear visually as intermittent blocks that can easily ruin any project. The effects of these hazards are amplified in HDV: Because HDV records in such high density, dropouts and errors affect more frames which could potentially lead to a greater disaster than what would occur with standard definition formats.
The result, the highest quality tape made even better! And just as with the predecessors to the PHDM63DM, this tape is Sony’s best performing media for use in all Mini-DV, DVCAM & HDV applications.
Good luck.....Joemandoo
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Filed under Pro Audio Equipment by on Mar 30th, 2010. Comment.
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Check Ebay for Screen Pop products.
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 Studio microphone mic wind screen pop filter mask shied US $15.59
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What is the best way to repair the screen in a pop-up camper window.?
I just bought a Gently Used pop up camper. The biggest issue is a large tear in one of the screens. I want air to flow through it, but not the bugs. How can i repair it?
the screen is usually nylon mesh. take another piece of screen cut it
about a inch larger all around . place over hole stitch by hand with fishing line or nylon thread. option 2 glue in place with clear nail polish.
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Filed under Pro Audio Equipment by on Mar 28th, 2010. Comment.
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Check Ebay for Cable Wire products.
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 XLR Pedal Patch Snake Cable Wire MIC Plug Adapter1001 US $.99
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How to split a cable wire?
I have one really long cable wire, and I want to split it.because I have an old device ; anyway how do I do this, and no i'm not talking about so I can get Free Cable, although that would be nice
Get 2 new RF cables and ONE splitter.
Attach the LONG cable to the center post and connect the 2 NEW cables to the TVs first, then attach it to the splitter...
You'll have split your signal in no time.....
And you will PAY LESS and have a better signal than if you BUTCHERED the Long cable and payed for the Crimper to install it....
"Oh, it's soooooo easy" they say. Then 2 hours later with 5 crumpled crimps sitting in your lap, and 6 inches of sheath pieces laying around you, you'll be looking for an expert to fix it....
And most of us laid down our crimpers years ago when cables became cheap......So keep that long cable in Pristine shape and just add cables.
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Filed under Pro Audio Equipment by on Mar 21st, 2010. Comment.