> Eric Grabowski <ejgrabow...@...> wrote: > > Skipp, I wonder if the antenna you "stole" this idea > from was the Hy-Gain GPG-1 high band ground plane antenna > we used to use in the late '60s and early '70s. The dc > ground was a real feature of this simple antenna. > > Sure wish I could remember how they connected the feedline > to this antenna. I recall there was an SO-239 on the > mounting plate, but I don't recall how they attached the > other end to the Beta match.
Nope, wasn't the GPG-1 although I did lift (stole/copied) a true hair pin matching design from the original HyGain 2 Meter 3 element Yagi. s. > --- On Mon, 2/22/10, skipp025 <skipp...@...> wrote: > > From: skipp025 <skipp...@...> > Subject: [Repeater-Builder] Re: Ground Plane and Dipole Diatribe > To: [email protected] > Date: Monday, February 22, 2010, 12:57 PM > > > > > > > > Â > > > > > > > > > > > > > > > allan crites <wa9zzu@> wrote: > > > Skipp > > > I sure would be interested in what your version of a beta > > > matched gnd plane antenna which results in a 50 Ohm match > > > looks like. > > > > It looks just like a standard 1/4 ground plane, single vertical > > radiator, three (typical) horizontal elements perpendicular > > to the vertical element. > > > > The Vertical Radiator is 5% shorter than the horizontal elements. > > At the base of the vertical radiator an 1/8 inch Aluminum Rod > > is attached with screw hardware and extends out perpendicular > > for X-inches (length of the Beta depends on the frequency of > > intended operation), then bends down for a a few inches followed > > by another bend and return rod length back toward the antenna > > base mount (ground) where it is attached (grounded) with another > > screw nut hardware combo. It's that simple... > > > > > Could you, would you, provide us with a description or > > > picture to satisfy my curiosity? > > > Thanks, > > > a. > > > > Satisfying your curiosity is a daunting task... I didn't > > think the Beta Match up, I lifted or stole the idea from a > > commercial antenna product I purchased back in the 1970's. > > > > You can model this antenna using EZNEC if you have a copy. I > > found a public domain version is supplied with the ARRL Antenna > > Handbook (on the included CD) if you have one. > > > > Age sometimes has its rewards... > > s. >
