>> Right-slightly OT, for a mobile antenna, you will find that you can >> squeak out a bit more gain by using a .64-wavelength whip instead of a >> pure 5/8-wave (.625) >> In the late 60's/early 70's, the NewTronics BBL series VHF gain antennas >> were rated at an honest 4dB gain-and did it. The A/S VHF gain antennas >> measured about 2 dB. They were actually end-fed 1/2-waves... >> If you can find an original BBL-144 still in good shape after 30+ years, >> keep it! >> -- >> Jim Barbour >> WD8CHL >> > > Are you telling us that the difference in length between .64 wavelength and > .625 wave length, a mere .015 (about 1.2 inches)amount, accounts for a full > db of gain?
End result: 4dB gain over a 1/4-wave (should've specified that part). Not sure whether it was a full dB over a 5/8-but that was the peak in the gain curve. > How do you know they provided 4 db of gain? > > 73 > Gary K4FMX Measured on their range-they used to be based in Cleveland, and my father was one of the designers. (anybody here remember the PRO-27JR 27Mhz antenna? Or the original 4BTV?) -- Jim Barbour WD8CHL
