--- In [email protected], "motarolla_doctor" <echoco...@...> wrote: > > Jeff, sounds correct both my and k5in's antennas look the same from the > photos. > > Were there any dimensions for these older, "flat element" BD410 antennas, in > particular, the element to element spacing?
There aren't absolutely specific element to element spacing dimensions for dipole antennas. I refer you to message #89961. Here is an excerpt as written by WN3A: On-horizon gain tends to peak at a little under 1 wavelength for the intra-bay spacing. As you go above 1 wavelength, the elevation pattern quickly starts to fall apart. As you go under 1 wavelength, the peak gain gradually starts to decrease as the major lobe gets fatter. At half-wavelength spacing (i.e. element tips almost touching each other), the gain is on the order of roughly 2 dB below what it would be as compared to the full-wavelength spacing case. A spacing of around 0.9 wavelengths at the highest-rated frequency is used for many VHF/UHF dipole arrays as a good compromise. Laryn K8TVZ
