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The all band doublet antenna is nothing more than a 1/2 wave dipole cut for your lowest operating frequency and fed with twinlead, ladder line, open wire, etc to a tuner that will accept a balanced line connection. IT IS NOT FED WITH COAX! The exact length is not critical!
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In this article you will find a basic drawing of a J Pole...
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In this article you will find a basic drawing of a J Pole antenna and the lengths, spacings, and other details to build one for the 17, 15, 12, or 10 meter bands. The J Pole antenna is a simple antenna to build for most builders and requires little skill or tools to make it work properly.
Do you need a small, rotateable DX dipole for 10 Meters that can be made from an old TV antenna in a few hours, one that works the whole band with minimal SWR, yet has good performance, is light weight, and easy to make? The WonderBar is just right for you.
12 paź 2015 · This antenna covers 80 to 6 meters with low feed point impedance and will work with most radios, with or without an antenna tuner. It is approximately 100 feet long, can handle the legal limit, and is easy and inexpensive to build.
Ever notice that gizmo at the base of your 1⁄2 wave or 5/8 wave two meter mobile antenna? It’s a cylinder about 2 to 3 inches tall and about an inch round. Within that gizmo is the 50 ohm to Hi Z matching device. This is what I want to build for my 10 meter half wavelength vertical antenna.
e call this antenna a “classic” because amateurs have been using it for more than 100 years. This antenna will allow you to operate on several HF frequency bands, and it radiates signals efficiently, sending much of the RF energy from your radio to far-flung corners of the world. 73 PROJECT BUILD Build a Classic Multiband Dipole Antenna
5 maj 2023 · Perhaps the best known is the G5RV antenna developed in the 1940’s and 50’s. This consists of a horizontal antenna 31m (102 ft) long, fed in the middle with 8.5m to 10.5m (28 to 34 ft) of parallel conductor line (depending on the velocity factor of the line used).
