5/8 Wave vertical antennas for HF

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Our 5/8 vertical for 20m, during a windy day.

Lots of radio amateurs build their own verticals. Most of them tend to stick to vertical antennas with a 1/4 or 1/2 wave sizing. Just a happy few build a 5/8 wave vertical antenna. This is remarkable, since the 5/8 has the lowest angle of radiation and has about 1dB more gain (compared to 1/4 and 1/2 verticals). So the 5/8 should be the favourite choice for DX’ing.

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Altoids L-tuner

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My Altoids L Tuner

A while ago Tjeerd PA3GNZ donated me some Barkleys mint tins (identical to the famous Altoids tins), which are rather popular by QRP builders to house small homebrew stuff. Two weeks later I found a czech webshop, offering a kit called “Altoids L-tuner”. This kit perfectly fits in such a tin. Since this tuner would be a perfect add-on for my 30m QRP transceiver, I immediately ordered it. — more →

A very small active antenna

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The kit contents: extensive documentation, a professional circuit board, and all necessary components.

Small active antennas like the “mini-whip” (by PA0RDT) are very popular at the moment. They provide good reception of signals from HF all the way down to the VLF band. Here in the Netherlands Van Dijken Elektronica sells a nice kit for this antenna, and since Adrian PA0RDA was interested in this antenna, I ordered this kit and built it. — more →

Wind, wind, wind

December was a very windy month. Most antennas did held, however the fibreglass pole of the 20m vertical broke. We contacted the supplier (DX-Wire, Germany) and luckely spare tubes were available for a few euro’s. So we ordered a replacement tube, and also ordered 2 more masts for future use.

We were not able to do lots of testing on the antennas, since work lasted too much time. So that has to wait for the next month.

Restauration of my Hy-Gain AV-12AVQ

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Fieldday setup of the revised AV-12AVQ antenna

After more than 40 years of service of my Hy-Gain AV-12AVQ groundplane antenna, of which 25 years on top of an apartment building at about 100 feet, Ernest PA3HCM and I decided that it was time for some refurbishing. The plastic parts were partly broken and others suffered from the heavy conditions the antenna had experienced. — more →