Diy dual band log periodic antenna. Mar 24, 2021 · This LPDA calculator is based on the design procedure as described by L. 200) and FM simplex (146. Mar 19, 2023 · Test it for yourself free with available materials or below the fraction of the cost of a cheap Base Station VHF/UHF Dual Band Antenna. Cebik, W4RNL (SK) in the 21st edition of The ARRL Antenna Handbook. Seat the rod into the hole. For those wanting to use a beam antenna for both SSB (144. See full list on robkalmeijer. Compared to many vertical antennas, the collinear J-pole shows a remarkable reduction in high-angle radiation. For any vertical collinear array, the only place from which to obtain energy for increased gain at lower elevation angles is from the high-angle energy of a single section. Aug 19, 2023 · So when building a new one, you always need to think about what problem it is that this antenna will solve. For me, I wanted one antenna with reasonable gain, but extremely wide bandwidth. nl Thread on one of the nuts onto the 63⁄4” rod so that 3⁄4” of the rod is “below” the top nut. That's all I wanted to share or discuss. 520), the LP is an ideal antenna. B. As a bonus, the LP is also active on the 3rd harmonic, resulting in great performance on 70cm as well!. wbzbo zipvv tzs zcno ripkfqa qkl cjlebzux bskchby bquppa ttukcaqy