40 meter array upgrade

40m 2-el @ SE0X

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This year I decided it was time to upgrade the 40 meter phased array. The fibre glass poles have been in the air for a few years, and winter time really wears them down. The plan was to replace them with aluminium which would also provide more rigid antennas to minimise swaying in the wind as this messes up the pattern of the phased array.

I did some extensive testing with vertical dipoles, I wanted to see if I could get rid of the radials. But in my situation the vertical dipoles where a few dB down in most directions and paths, so the decision was made to stick with full the current setup using full size verticals over 20-24 radials.

The bottom delrin isolators where originally machined for the vertical dipoles. I also decided to replace the coax phasing cables that had seen many years in the field with brand new cables.

40m vert base @ SE0X

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The performance of the array is not very different, it always worked great and hopefully the better mechanical construction and stability will help it survice a few winters to come.

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