That's good news. I am in Saudi Arabia on a small lot. My plan is to use my ladderline-fed Cobra Ultralite dipole (73' long), tying the 100' ladderline together, making a T. Will load it against a decent ground via a wide range tuner.
Thoughts? Thanks, Ed 7Z1ES > On 20 Feb 2020, at 7:45 AM, GEORGE WALLNER <aa...@atlanticbb.net> wrote: > > The T has another advantage: it is better on 80 (and 40) if you can match > it. A 160 m inverted L, with a substantial length horizontal wire, makes a > poor 80 meter radiator because of high angles. A T will give you more low > angle radiation. > > 73, > George, > AA7JV > > >> On Wed, 19 Feb 2020 15:31:21 -0500 >> "Ed Sawyer" <sawye...@earthlink.net> wrote: >> Rick said it better. Thanks Rick. The T has been a great performer for me >> in 4 different locations over the years. I swear by it for 55 - 70 ft >> vertical sections. >> >> Ed N1UR >> >> -----Original Message----- >> From: Richard (Rick) Karlquist [mailto:rich...@karlquist.com] Sent: >> Wednesday, February 19, 2020 3:04 PM >> To: Ed Sawyer; donov...@starpower.net; topband@contesting.com >> Subject: Re: Topband: T-loaded vertical >> >> >>> On 2/19/2020 11:50 AM, Ed Sawyer wrote: >>> I have personally found that for Ts that are only 70 ft vertical, like >>> mine, the ground losses of the long topped L are not as desirable as the >>> cancelled out horizontal lobes of the T. If the T were say 90 ft of >>> vertical, I don’t think the T adds as much value. >>> Ed N1UR >>> >>> >> When you model an inverted L, the driving point resistance >> goes up when you lengthen the top. This it appears that >> you decreased ground losses and your efficiency goes up. >> However, if model vertical polarized radiation vs input >> power, you find that your effective efficiency actually >> goes down. >> >> Extending the inverted L top out to where you have a 1/4 >> wavelength of wire seems very elegant. The antenna >> reaches resonance at 1830 and you get a low VSWR without >> using a tuner. If you model that vs a T vertical, there >> is no comparison. The T wins. >> >> Rick N6RK >> >> _________________ >> Searchable Archives: http://www.contesting.com/_topband - Topband Reflector > > _________________ > Searchable Archives: http://www.contesting.com/_topband - Topband Reflector _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector