> -----Original Message----- > From: tcwug-list-admin at tcwug.org [mailto:tcwug-list-admin at tcwug.org]On > Behalf Of Joel R. Helgeson > > Are you stating here that using the tower itself as a > repeater would be > feeble? If so I agree. That is NOT my intent. My intent is > to use two > parabolic dishes to redirect the signal. > Bob suggested using the tower itself. I commented that his numbers don't make a path estimate and that I didn't expect tower alone to work. My earlier reply was to you and that path estimate indicated that the passive repeater should work with my numbers, but you should use your real data to run better numbers than my example that uses guessed numbers. > -----Original Message----- > From: tcwug-list-admin at tcwug.org > [mailto:tcwug-list-admin at tcwug.org] On > Behalf Of Chuck Cole > > > > > -----Original Message----- > > From: tcwug-list-admin at tcwug.org > [mailto:tcwug-list-admin at tcwug.org]On > > Behalf Of Bob Gilbertson > > > > Depending on the angles involved to the tower, and the tower > > shape you may > > be able to just bounce the signal off the tower itself. > > Wouldn't take much > > to try it. 21 dB over isotropic is aiming quite a bit of > > signal in the > > desired direction. Same concentrating effect is seen on the > > receive side. > > If you're driving, say, 100mW into the antenna this would > > give about 10 Watts > > ERP, which is a robust signal at 2.4 Ghz. > > > Those numbers don't go together to make a path estimate. ERP doesn't > affect > actual watts per square meter field strength at the tower: it's only > saying > that a bigger transmitter on a dipole would do the same as > the 100mW on > a > parabolic. The tower is probably cylindrical which is dispersive and > thus a > lossy reflector at best, and its vertical angle isn't good > for a bounce > either. The receiving antenna's area is the only concentrating effect > there: square meters for an incoming wavefront of some watts > per square > meter power density, so the result is some microwatts down the coax > pipe. > > > Might work, but looks feeble. > > > Chuck > > > _______________________________________________ > Twin Cities Wireless Users Group Mailing List - Minneapolis/St. Paul, > Minnesota > http://www.tcwug.org > tcwug-list at tcwug.org > https://mailman.real-time.com/mailman/listinfo/tcwug-list > > _______________________________________________ > Twin Cities Wireless Users Group Mailing List - > Minneapolis/St. Paul, Minnesota > http://www.tcwug.org > tcwug-list at tcwug.org > https://mailman.real-time.com/mailman/listinfo/tcwug-list >