> -----Original Message----- > From: [email protected] [mailto:Repeater- > [EMAIL PROTECTED] On Behalf Of Jim B. > Sent: Monday, February 19, 2007 12:42 PM > To: [email protected] > Subject: Re: [Repeater-Builder] Re: Antennas that work both in commercial > and amateur > > Laryn Lohman wrote: > > --- In [email protected], "Barry C'" <[EMAIL PROTECTED]> > > wrote: > > > >> I presume its some sort of stacked arrangment , in chich case it > > will make > >> that gain at resonance , > >> > > > > Yes, the ASPB602 is four stacked dipoles, just like the DB224. My > > point again is that resonance is NOT a requirement for an effective > > and efficient antenna. > > 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? How do you know they provided 4 db of gain? 73 Gary K4FMX
