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Which is correct PGXL or HF Auto

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KB4OIF
KB4OIF Member ✭✭
in Power Genius XL Amplifier

Good morning. running a 8400M, PGXL, and a HF auto tuner. 27 watts of drive from the flex. SWR 1.2. When TX, PGXL says 550 watts(EXAMPLE) hf auto says 425 watts. running it into a Delta Loop for 40 meters. Which one is correct. 110 Volts house power.

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  • Mike-VA3MW
    Mike-VA3MW Administrator, FlexRadio Employee, Community Manager, Super Elmer, Moderator admin
    Answer ✓
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    They are all correct. SWR, forward and reflected power are not a constant across a feedline unless it is into a resistive 50 ohm load. If you change the length of the feedline you will see it will change to new values. If you know the SWR on the Antenna side of the tuner it might help explain things a bit more.

    https://www.arrl.org/files/file/Technology/tis/info/pdf/q1106037.pdf

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