Don't fear the tuning. Follow this routine from your downloaded PDF:
If your SWR is perfect but you are still receiving heavy signals from the rear, adjust the critical air gap (Dimension C) slightly. This gap controls the phase relationship between the two elements. 5. Advanced Variations: Multi-Band and Verticals hf antennas for all locations moxon pdf hot
The structural geometry inherently provides a near-perfect 50-ohm match at the design frequency, removing the need for complex matching networks or lossy tuners. Don't fear the tuning