Silicon Investor (SI) -- The First Internet Community

STOCKTALK

We've detected that you're using an ad content blocking browser plug-in or feature. Ads provide a critical source of revenue to the continued operation of Silicon Investor. We ask that you disable ad blocking while on Silicon Investor in the best interests of our community. If you are not using an ad blocker but are still receiving this message, make sure your browser's tracking protection is set to the 'standard' level.

Microcap & Penny Stocks : Globalstar Telecommunications Limited GSAT -- Ignore unavailable to you. Want to Upgrade?

To: Selectric II who wrote (16647)	9/10/2000 5:21:56 PM
From: John Walliker	Respond to of 29987

Selectric II, You missed by far the most powerful source of pulsed radio frequency power - the air traffic control radar. Many years ago as a student I was working for an electronics company (Magnetic AB) based on the perimeter of Bromma airport near Stockholm. One job was calibrating some microwave noise sources. It was necessary to be extremely careful with tightening the copper gaskets on the waveguide flanges, otherwise the airport radar totally ruined the experiments. John

To: Selectric II who wrote (16647)	9/12/2000 1:17:18 PM
From: RalphCramden	Respond to of 29987

In fact the RF sources WITHIN the airplane are much stronger then the ones coming from outside. People like the optical analogy so lets go with that. I fly in a darkened airplane at night six miles above a city where millions of people have lights on in their houses. Still it is dark in the airplane. But one tiny penlight I turn on IN the airplane, and the guy next to me wakes up annoyed at the optical intrusion. Similarly with all the RF noise. The ambient added up from all the junk that is not in the plane (including Radar) is going to be less than a single cell phone sending out an access probe from within the plane. And phones do send out registration power when they first encounter a cell system after being away from the system for a while. Meanwhile, I am sure that on the average commercial flight out of a commercial airport in california, at least 3 phones per flight are inadvertently left on. They tend to be thrown in bags turned on, and people land and take them out and they are still on. And as far as I know, no airplane incident involving a turned on cell phone has ever been reported, but I have not searched for such incidents either. Is the FAA too cautious in not allowing cellphones? I think probably not. Eventually there will be enough data and a more informed decision can be made. In the meantime, "probably OK" is a standard too low for employing in governing commercial flights. To the moon, Ralph