a 440-7 is very pointy compared to a 440-3, from my somewhat limited experience. i have had a hard time tracking rockets compared to others using the 440-3, due to not pointing at the rocket as good. I may have to buy a some more dongles so that i can run different antennas at the same time.... a whip, a 3 and a 7.
Yes, the terrain has a lot of influence on how well you recieve signals. I dont know if youve done much RF tracking, but terrain bounces the signal around a bit. powerlines, and automobiles put out significant amounts of noise too. if you can elevate the TM a bit, like a bridge or hill, you will see you have much better visibitly. one way i have found is to elevate the antenna a tad and move the elements from horizontal to vertical. about the best at home test i do, i can get about a mile LOS with my 440-7. when i get a new dongle to replace my broken one, i will do some signal strength tests for future refrence, I didnt really pay any attention since it worked. Your setup is another place to look, have you done the test with just the TM, and inside the rocket. your rocket could be causing the issues if there is something RF opaque. like CF. On Tue, Jul 23, 2013 at 6:30 AM, Anthony Kremor <[email protected]> wrote: > Sorry to post again, just wanted to see if I should be worried about the > range I am getting. I have only performed ground tests so far, LOS as far > as I can tell (it is a highway) but am only getting .4 miles before I can > no longer receive data from the Telemetrum. I am using a 440-7 from Arrow > Antennas. Would my .4 miles on the ground translate to a much higher range > in the air, or should I be going over my setup? > > Thank you > > > On Sat, Jul 20, 2013 at 9:57 AM, Ted Apke <[email protected]> wrote: > >> Keith, >> That's 20k with a "whip" on the dongle? Vertical? >> >> Wow! >> Ted >> >> >> On Friday, July 19, 2013, Keith Packard wrote: >> >>> "Today & Tonight Mag. - Chris Douglas" <[email protected]> >>> writes: >>> >>> > Can anyone tell me the highest they where able to record with the whip >>> > antenna on the teledogle. When does it go out of range. I'm debating >>> > on the Arrow 440-3. But not sure if it necessary. My computer model >>> > estimates about 3,500 ft with the setup I have so far. Any thoughts >>> > would be appreciated. Thanks >>> >>> We've tracked rockets well in excess of 20k', and our numbers indicate >>> that the available range should be significantly greater. >>> >>> -keith >>> >> >> _______________________________________________ >> altusmetrum mailing list >> [email protected] >> http://lists.gag.com/mailman/listinfo/altusmetrum >> >> > > _______________________________________________ > altusmetrum mailing list > [email protected] > http://lists.gag.com/mailman/listinfo/altusmetrum > >
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