After using verticals for 40 meter and last year a delta loop this year I choose to make a rotatable dipole

An improved double extended zepp 40 and 80/75-meter

Homebrew vertical antenna worked great for FD netting me 60 contacts in 23 U.S. states

Scale 1:100 all dimensions in meters, overall length 16.6 m, f = 7 mhz

Bands 40 meter the antenna consists of 6 runs of stranded wires spaced evenly around a plastic circle

The dipole is approximately 42 feet across

The Lazy h antenna is a general type of antenna that is in the curtain array famil

160m seems not to tune up at all now and the feeder radiates on 40/80m just as the coaxial dipole did

Install as many radials as you can around the base of the antenna, they can be anything from 1/8 wave or longer, all you need to do is to cut a slot in the lawn and push the radials down

A very fine antenna that should ma.ke the lives of many hams much better by using a loop antenna instead of the inverted V's that so many of us use now

The vertical antenna looks to be the perfect low angle radiator, except for one thing the height of a 1/4 l at 80 metres is 20 metres, or 66 feet, which is not practical to construct

The shortened dipole for 7 mHz ,it is made from insulated wire ,the coils are wound on 40mm ferrite as above, with 40 turns of the same wire on 1.5 ins PVC tube

Without a doubt - innovation! this antenna, despite the problems i've faced, is undoubtedly the last one i'll buy

An HF antenna, and this antenna does not exceed the total length of 23 meters and the performance of this antenna is excellent

Half-wave antenna for the 40m band, the tuning system is installed at the top of the attic, to be as close as possible to the radiating strand

Designed my btfd to operate on a minimum frequency of 1.8 mhz with an intended use spaning from 1.9 to 11.0 mhz

The capacitive antenna is a very space-saving antenna with good receivings caracteristics for the interior also for sending with 100 Watts

How to turn a CueDee with some quirky handles 4-element mono bands for 14 MHz to an effective duo band for 7 and 14 MHz

When it comes to dipoles, we wonder how efficient

The antenna is fed with a Transmatch-Tuner and Baluns 1:1 or 1:4 for the bands 40m and up

La lunghezza complessiva può essere ridotta fino al 40% della dimensione originale quarto d'onda senza le perdite risultanti dall'utilizzo di una bobina di carico

An antenna whose electrical conductor is much smaller than half the operating wavelength is an electrically short antenna

By efficient we mean an antenna that will radiate 90% or more of the energy output from the transmitter/amplifier, without a tuner

Solution of multidipole in the attic

Prototipo di antenna per i 7MHz di dimensioni maggiori alla precedente, 22cm di diametro

This full-size quad-cubical antenna of an element for the 40 mts band, it is a very good antenna, both in transmission and reception, it is built with copper wire

To construct each side of the antenna proceed as follows,cut a 10.25 metre length of 24/0.076 insulated wire, and a 160 mm length of 40 mm o.d plastic tubing

Loaded dipole antenna that is intended to fit in available space

Having only a single vertical support or limited horizontal space might be a problem.Such a problem can be solved by mounting a dipole at a slope

To build a 40 meter antenna, the antenna consists of a single dipole antenna placed very close to the ground and above a reflecting screen

A quarter-wavelength antenna is easy and inexpensive to build and can be an effective antenna with a low angle of radiation

The radials are oriented 145 degrees apart not quite the 180 degrees desired but close enough

An interesting method of converting a TH-7DX or other tribander with a 24 foot boom and grounded parasitic elements to a 40 meter rotatable dipole

Lantenna si puo' costruire solo sulle bande ALTE,in questo caso non ha bisogno della bobina

Il principio di funzionamento è relativo al carico lineare