Indoor antenna for 7 Mhz
I’m looking to setup a hidden / indoor antenna, and i’ve found a couple of interesting articles on hidden / stealth antennas
This small antenna can allow hams which lack space to install an antenna for 40 meters. This project has been originally produced by F6CYV. I’m going to test this antenna in the coming weeks. I will try to setup this inside my balcony.
According to his experience, using it form inside the apartament, european singals are all very readable, he has worked over 150 countries.
The antenna is made of 2mm wire.
The 2 coils are constituted by 18 turns of 2 mm wire, distance of tunrs is also 2 mm.
The diametre of the coils is of 7,8 centimeters.
The Feed of the dipole is done with a 75 ohms tv coaxial cable.
A 1/1 balun would be recommand for a correct feed of the coaxial cable to the dipole.
It is not necessary to use a coupler, it is enough to set the length of both extremities of
the dipole in order to have at 7.050 mhz a low SWR, and especially to pay attention what the lenght of the 2 sides of the dipole to be identical.
Technorati Tags: antenna, ham-radio, amateur radio, HF antenna
February 17th, 2007 at 8:00 pm
This antenna could be interesting. You have any experience, with this? i looking for antenna for my ft-897, i live on condominium, i have antenna of movil for 2 metres, but i don´t hear any station on hf, and is very sad for me, congratulations for your article and you have a good day
December 10th, 2007 at 12:04 am
That’s a cool one, but what are teh formulas you’re using to design this antenna? Metric copper wire est impossible to find in North America!