LightningBolt Quad SWR

    Below are the SWR plots for the 5 band LightningBolt Quad.  The quad is fed through a 1:1 balun which feds all five driven elements in parrallel through a single feedline.  The SWR measurements were taken at the transmitter end of the feedline through approximately 160 feet of LMR-400 Ultraflex coax cable.  The SWR shown is the result of following the assembly instructions.  No additional adjustments were made after assembly.  For my installation, the 20 meter and 15 meter driven elements appear to be a little long, but they are close enough since the SWR is below 2:1 everywhere.

    20M SWR plot


    17M SWR plot


    15M SWR plot


    12M SWR plot


    10M SWR plot



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