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© 2010 Arctic Diamonds - TF4M
I have now installed elevated radials which need to be adjusted to bring the antenna to resonance at the correct frequency.
The antenna has a beautiful SWR curve centered on 1775 kHz as measured on my antenna analyzer.
I am able to use the antenna with low power at the low end of the band and I could not resist making a few contacts.
Initial comparison between my previous Top Band antenna – a Double L – on receive indicates that the new antenna outperforms the old transmit antenna by 15dB.
Tomorrow I will adjust the elevated radials and install them permanently.
Beautiful isn´t it?
2 Responses to “Almost finished!”
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Hi Thor,
This “KING” antenna is a Vee-beam, or rhombic?
Do you have a Map of your antenna property? Can you publish it?
The antenna is a design by TF3DX. Details may be published later, but in a nutshell the antenna may be fed in Common Mode as a “T” vertical against elevated radials OR it may be fed in Differential Mode as a resonant Dipole. In addition the antenna will be made to work on both 160 meters and 80 meters.
On 80 meters especially, the feed will be at a high impedance which is the reason for the big insulators.
The antenna will begin life as a vertical on 160 meters only – it´s primary function – other modes will be activated next summer when the weather is better.
TF3DX is an electrical engineer/professor at the University of Iceland and he has been working on the design for two years. A month or so of number crunching CPU time has gone into modelling the antenna with EZNEC Pro5.
One day I will have time to make a map of my antennas.