开云体育

Built a Multi Z tuner for QRP use. Does the job on 20 and 17 meters but I can't get it to tune 30 or 40-meters. I am wondering if removing or adding turns from toroid would help over come the problem. Tested with two different EFHW antennas of different length. No LED dimming noticeable even in low light conditions. Tnx fer u r thoughts...