GRA MAT50 HF Ground Enhancement Mat for Mobile Screwdriver Antennas, Improves SWR and Ground Coupling for 7 to 50MHz, Dual Pack Support for 3.5MHz

Made for the real problem in mobile HF Many mobile HF antennas tune the whip, but the vehicle still lacks an ideal RF return path. GRA MAT50 helps improve ground coupling, so tuning becomes more stable and SWR is easier to bring down, especially where vehicle mounting conditions are not ideal. ^^ Designed for 40 meter pain points User reports around ATAS 120A repeatedly show that lower HF bands are more sensitive to grounding and counterpoise quality. GRA MAT50 is built to help mobile operators on 40 meters and above create a more effective ground reference without complicated radial systems.

^^ One mat for 7 to 50MHz, two mats for stronger low band support Usable frequency range is 7 to 50MHz. For 3.5MH z operation, using 2 sets increases the effective coupling area and helps improve low band performance where a single small ground surface is often not enough. ^^ A practical upgrade for automatic tuning antennas If you use antennas like ATAS style motorized tuning antennas, you already know the whip can move but the ground does not fix itself. GRA MAT50 gives your setup a better foundation, helping the antenna system behave more like it should.

^^ Compact, durable, and made in Taiwan Supports 500W SSB and 200W FM or CW, with heat resistance from minus 20 degrees C to 90 degrees C. Sheet body size is 80 x 195 mm, wire length is about 30 cm, and total weight is about 55 g including wires and terminals.