Inside DXZoneBest Links of the Week Top Amateur Radio links of the week Issue 174 Best new links of the week 4 2017 Feb 11, 2017 1682 Ground Plane Antenna Calculator Buxcomm This calculator is designed to give the vertical length of a quarter-wave ground plane antenna, and the length of each of the four radials for the selected frequency you have entered Radials on Vertical Antennas N6LF Experimental Determination of Ground System Performance for HF Verticals 70W SSB Power Amplifier For FT-817 or KX3 PD7MAA DIY kits a 70W SSB linear Power Amplifier for YAESU FT-817 KX3 running HF 80m-10m bands Noise canceling DSP for ham radio FT817 Luca Noise canceling DSP for ham radio good for Icom, Yaeu, Kenwood and any kind of radio Software Defined Radio on a tight budget 2E0GHX RTL SDR can be for new amateurs the good way to get a taste for SDR without having to spend a small fortune Full Wave Loop Antenna Calculator JJ Johnson Use this online calculator to determine the length of a full-wave loop antenna from the frequency. Both metric and English units of measurement are supported. Quarter-wave matching section lengths are also calculated. Short Vertical Antennas and Ground Systems VK1BRH Relevance of a proper ground systems on short HF vertical antennas, with an analysis on a vertical antenna for 160 meter band PI4CC Contest Club A modular high power bandpass filter 30 Meter Band Pass Filter KE7HR A homemade band pass filter for the 30 meter band based on the original VE7BPO design Dipole Calculator JJ Johnson Use this online calculator to determine the length of a dipole antenna from the frequency. Both metric and English units of measurement are supported.