On Fri, Jan 24, 2003 at 03:24:54PM -0800, Aerofoam wrote:
> > A very worthwhile advantage of the dipole is to lessen the effects of
> > inteference. It would also be feasible to run one element down each
> > wing.
> >
> This is what we did on some HLG's
> It does reduce interference and seems to increase range.
That's in line with the theory :-))
> I have a bit of radio knowledge from the university of hard knocks!
> I am going to put a ground plane on my TX antenna, a friend did this and had
> over 5 miles useful range.
I don't think my vision would be any good at that range >:-o
University you mention is not for wimps >:-))
> I will also be flying by video and am looking at 500mw 900mhz stuff, but I
> would rather get 440mhz.
That should be an interesting project, flying by video would definitely
require some different skills.
> If you know of some good suppliers for this kind of thing, let me know.
Sorry can't help there, nothing on the internet ?
> I also need to find the specs for building yagi beams on 440 and 900.
> I know they are very simple, but don't know how to calculate the lengths.
> Any ideas?
As you are in USA try your local library. The ARRL book Antenna
Anthology would be a starting point. There are also some books
specificaly on yagis. I have not been active on amateur radio for
some time now so I am out of touch with what is currently available.
A search on Amazon.com or the ARRL website or indeed Google may help.
Apart from element length, spacing is important with yagis.
Thinking about it,the book - Antenna Anthology may not fit the bill,
have a look anyway.
There were however books available through ARRL for vhf and uhf....
would be better.
> Are you flying any foamies yet? you should get one if you haven't, it will
> increase your piloting skill a bunch.
Started off by slinging a zagi off my local slopes. Once I got the hang
of it I started using the 100" RES I built. Just finishing a 60"
aerobatic slope soarer kit :-)) Taught myself to fly... usually
only me up there. I also have several hills to choose from.
> A simulator is good too, especially for practicing rolls, inverted etc.
> I bought some of the last MPX sims while they were being blown out. They are
> only $10.00 and allow
> online slope combat. Let me know if you want one, I have about 4 left.
>
Thanks for the offer Mark, I just use FMS for a simulator. Not keen on
sims though... prefer the real thing.
Reg
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