I have the same problem however using a D72A and Elk antenna. Will try the suggestion for diff uplink freq that Mark suggested 

On Fri, Mar 26, 2021 at 3:17 PM <sjdevience@gmail.com> wrote:
Thanks guys. I'll try going to medium power (10W). 

I'm using the latest software, Kenwood TM-D710 connected via USB to a Linux laptop, and a homemade arrow with 4 ele VHF and 5 ele UHF.
I think 5 kHz steps are the smallest it has, so I can't fine tune the doppler that much.



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