HY-GAIN - 18AVT antenna - renovating
For the moment - June 2005 - only 4 band is mounted.
My decision is, that the antenna must work in the CW-bands.
"Maybe just a little more height and a little more GAIN!"
7 MHz | This have to be longer.
Resonance must be 30 KHz lower.
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14 MHz | This have to be shorter.
Resonance it 14.025 MHz, but have to be abt. 14.50 MHz. |
21 MHz | This have to be longer.
The resonance is 21.135 MHz but must be changed to 21.50 MHz. |
28 MHz | This have to be longer.
Resonance is 28.928 MHz but must be abt. 28.250 MHz. This is the major problem.
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Renovation of the antenna have shorten the coils. This is because of some corrosion inside the coils - made of aluminium wire. The original aluminiumpibes is not long enough to give resonance where it shout be on 10 meter band.