Unfortunately DF2CK’s website has vanished. I used the DL6WU spreadsheet calculator of DF2CK to calculate all measurements. Using the DL6WU formulae, this results in a 14 element yagi, with a gain of over 13 dBd. At one end I mounted a standard available mast mount, leaving about 90cm for the actual antenna. For this antenna I bought an square bar (15x15mm), made of aluminium, length 1 meter. This material is also easy to drill, saw and grind. I started with my design criteria:īecause of low weight and easy handling I mostly use aluminium to construct VHF/UHF antennas. In the past I built a couple of 2m beams using DL6WU’s design, so I decided to use this again, now for my 23cm yagi. Many other designs are actually just small modifications of the DL6WU formulae. Guenter Hoch DL6WU has researched this subject for decades, nowadays his design formulae are accepted throughout the world in both commercial and home made antennas. There are lots of designs available for yagi antennas. To achieve a more steady uplink, I decided to build an antenna with a bit more gain, at least 6 dB extra compared to the HB9CV. Although this antenna works nicely, its gain just isn’t enough when their 23cm preamp is broken (which, unfortunately, is the case most of the time). In the previous Winter I built a HB9CV-in-a-box for 23cm for my uplink to the local ATV repeater PI6ATV. My 23cm yagi antenna, in fixed position to the local ATV repeater.
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