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#25
June 20th 06, 05:19 AM
posted to rec.radio.amateur.homebrew
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is an STA needed to transmit data on CB channel 40?
wrote in message ... wrote: wrote: wrote: Let's see, all you have to do is find a bunch of laptops with 12V adapters, 12V power is standard power jack for laptops Funny, the last laptop I bought doesn't include a 12V cable. As a matter of fact, neither did the one before it. You had to ask for it as an add-on. I guess it is the new laptops that use 12v, the only laptops I have here have an 18v adaptor for the Zenith or 120v input for the Toshibas. I guess noone will be borrowing mine to use in an emergency. What sort of emergency responders are going to be sent in with no equipment? With the right soundcard software a laptop could emulate a bell 202 or 103 modem over AM radio, even with packet error checking to reduce transmission errors. What no one has mentioned yet is channel usage, one simplex data channel for an entire disaster area with no provision for collision detection between users other than just listening for someone else transmitting? With the central data collection point high enough to cover the entire area, you will be in the position that each transmitter may not hear another but the reciever can hear both while transmitting at the same time. The data collector would spend quite a bit of time acting as net control determining which remote site was allowed to transmit at any particular time. Just my $.02 on this poorly thought out idea. thanks, John. KC5DWD |
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