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"Refer to antenna" gives different resonance frequency than at end of feedline


 

02 January 2021


Happy New Year all!

If I do a OSL at the end of the coax to my horizontal top band loop and measure at the antenna end of the coax I see quite a lot higher frequency resonance than when I measure at the end of the coax in the shack. I can understand the Rs changing, but that remains the same, so please, why does the resonant frequency shift? Measuring at the antenna resonance is very close to the minimum SWR. At the shack end without "refer to antenna" the resonant frequency is shifted quite a lot higher, over 2.2 MHz. I can't understand why this is and if it's normal. Thanks.



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Best regards,
Chris mailto:chris@...

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