Our limited experience so far has required directional antennas to go 3 to 4 miles on ground level up to 2 stories. Higher elevation with a clear path got 17 miles with omnidirectional gain antennas (4 segment colinear). The cases were: 12 element Yagi at 5ft to omnidirectional at 35 ft, 3 miles. Omnidirectional at 15ft to omnidirectional at 35 ft, 5 miles. 12 element Yagi at 45ft to omnidirectional at 20 ft, 4 miles. Omnidirectional at 7ft to omnidirectional at 35 ft, 17 miles. High point to high point clear path. Buildings and trees have a significant effect at ground level and we are sticking with non-mobile operation. We are also doing WiFi access, data transfer which tends to be stationary. Air mobile might have a chance subject to rotor/propeller multipath effects. Mike KD6GWO
Don Russell <w9...@live.com> wrote: Anyone try the 128K high speed data while mobile? I mean in a vehicle above say at a constant 30-45 mph. What about at higher speeds? Would it work to say a helicopter or airplane orbiting over the city where the access point is? Or would the Doppler shift be too much? I am wondering if it could be used to feed data to/from a CAP spotter heli/plane should the proper equipment be installed in the craft? Also would like to know of anyone successfully using VOIP. Is it possible to send voip over the high speed link. I am thinking asterisk box with a standard pstn connection at the AP and some kind of IAX client running ILBC or GSM. That way a served agency could make a real TX call via a d-star connection. The only other way could like of being able to do this is via a DVDongle and some creative audio patching. The concept is to be able to get a call to PSTN via D-star. Thanks, Don W9DRR _________________________________________________________________ Windows LiveĀ Groups: Create an online spot for your favorite groups to meet. http://windowslive.com/online/groups?ocid=TXT_TAGLM_WL_groups_032009 [Non-text portions of this message have been removed] ------------------------------------ Please TRIM your replies or set your email program not to include the original message in reply unless needed for clarity. ThanksYahoo! Groups Links [Non-text portions of this message have been removed]
