Re: How to reduce RF power out stepwise with a ubitx V3?
Others on this board have installed multiple RV1s with a switch to select between them or to flatten power across bands, to relays driven by the band selector signals. Since the power out varies so much by the band, if you are not going to work only one band, I would suggest that you bring it out to the front panel, and through experimentation work out by band the correct setting for the mode you want to use. That would be easier if you had a scale for the control.
The above is just a suggestion. You can search the board or the internet for flattening ubitx power output by band.