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1:1 VSWR on the 40m Band, high VSWR on 80m

Ty
Ty Member
edited May 2020 in FLEX-6000 Signature Series

I am running a StepIR Mark IV mast antenna with 80m coil kit and Flex 6700&&SDR Suite.
When I Tx on the 40m band I can frequency offset my SDA off of autotrack such that I can adjust the frequency to unity 1:1 VSWR. I have loopback and dummy load outputs that I can verify with my Flex6700 100W RF Power just to ensure 1:1 VSWR. at 8.55 MHz on the SDA100 I am getting a 1:1 VSWR at 8.0MHz in the SSDR suite. I am setting a frequency SDA offset so that in SDR I will maintain proper VSWR so as to not burn out PGXL amp with resonance.

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