Alpha-Delta DX-LB Tuning Issue
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| Feb 3rd, 20:16 | |
KA2PFLTotal Topics: 0 Total Posts: 0 |
Having an issue with a newly installed Alpha-Delta DX-LB. This replaced a sloper antenna on my tower mounted 55 feet up. The lowest SWR below was measured on each band with a rig expert antenna analyzer and verified with my HF radio. 40 Meters 6.565 MHz would like to tune it for FT-8 at 7.074 appears antenna is too long. 80 Meters 3.856 MHz would like to tune it for FT-8 at 3.573 appears antenna is too short. 160 Meters 1.827 MHz would like to tune it for FT-8 at 1.840 appears antenna is too long. Was going to start by shortening up the 40 Meter wire first. Then lengthen the wire between the 80 Meter loading coil and the 160 Meter coil. Then finally fold back (shorten) the wire from the bottom of the 160 Meter coil. Is this the best way to go about tuning this antenna? Is there some way to calculate how much to cut and or lengthen the wire for each band section? Thanks, Louie KA2PFL |
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