Posts

Showing posts with the label Quarter Wavelength Vertical Needs No Trimming

Quarter Wavelength Vertical Needs No Trimming

Image
Here are some more vertical antenna suggestions from Australian radio amateur Peter Parker (VK3YE). In this case, Peter builds a vertical antenna that requires no trimming to be operational.   If you can't see the video, please insert this title URL into your browsers search box: https://www.youtube.com/watch?v=9ObV_OpK1rQ This is post 2745 in a continuing series of simple ham radio antennas. Here are some comments from Peter: You don't always need to precisely cut your antenna if you have a part of it coiled up and switched. Here I take 4.6m of thin insulated wire and connected it to five shorter pieces (about 10cm long) wired across a rotary switch. This allows its length to be varied. The advantage of this is that you can cover about a 10% frequency range rather than the 3% that a fixed length antenna covers. This experiment was with a 1/4 wavelength vertical on 14 MHz but if you want to do it for 28 MHz I would suggest using about 2.3m for the vertical element and pieces of