[K3CAL] No tower ... No Problem

[squeeze.box at comcast.net]

Jim, I've looked at this but never got the opportunity to work one up before I left the job.... a few 100 feet of Kevlar cable on a winch, bolted into a cement, or welded to something really really heavy.   Painter's masking tape the antenna, preamps , coax and the control wires as you deploy the kevlar and UAV.  (rip the tape and wires off the kevlar as you wind in) For my work, I've done it a few times but with a kytoon (Kite ballon).  Bell Helicopter has a uav design, and there have been a few prototypes put together by various small businesses.  Agree, very cool, but you don't have the fun of talking like Donald Duck when you deploy.

Dan ww3n


>     On 10/16/2020 9:23 PM James Tetlow <k3uga at comcast.net> wrote:
> 
> 
>     Might be better to use remote rig method. Instead of sending rf, send data link / voice via network cable (light weight) to tx /rx body on UAV with antenna. CAD control by 
>     Desk top / laptop computer. No you don't have to have loss on rf, and could even, put amp on UAV for max power with no transmission  line loss. (or swr problems). Much better than helium balloon!
>     Sent from my iPad,
>     Best Regards, 
>     Jim Tetlow
> 
> 
>         > > On Oct 16, 2020, at 19:53, Shawn Donley <n3ae at comcast.net> wrote:
> > 
> > 
> >     > 
>         > >         Here's something interesting.....   a long endurance tethered UAV that can lift your VHF/UHF antenna to great heights while remaining stationary for hours, days or weeks.   A pair could make a split site repeater.
> > 
> >         The trick is sending electrical power at high voltage up a tether to the UAV where it's converted back to lower voltage to run the motors and avionics.  High voltage allows the tether wire gauge to be much smaller and thus lighter in weight.
> > 
> >         Now if someone could figure out how to couple RF to the tether itself, you could have a full size 160M quarter wave vertical (after adding the required ground radials).
> > 
> >         Cost?  I'm guessing a good deal more than a top of the line ICOM IC-7851.
> > 
> >         https://www.dragonflypictures.com/products/umar-tethered-uas/
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