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Thanks for the report - it's really helpful in trying to trouble shoot and keep the remote running reliability and consistently which is the end purpose so it works easily for all.

1.? Preamp:? There are actually two (2) levels of pre amp built into the K3 software.? The firest level is what you get when you cycle the PRE button - it goes from OFF to ON and then back to OFF.? It's what most folks expect to happen.

However:? I've programmed the PF1 button to engage a 2nd level of amplification - BUT - this only works on 12, 10 and 6 meters.? If you cycle the PF1 button on either of these bands, it works as:? OFF => ON (preamp 1) => ON (preamp 2) => and back to OFF.? Unless you are using a K3 Mini or a K3 in terminal mode you won't see any indication of the 2nd preamp but you will hear it.? I usually leaave the 2nd preamp engaged on these bands - sometimes someone operates the regular PRE button and effectively turns the nd preamp OFF.

I usually advise op's to download and actually read the K3/s operating manual for more information.

2.? What MODE were you using when this happened?? And - using the amp on OPER or on STBY.

Ten meters has been problematic for us for quite a while.? In spite of throwing hundreds of dollars at the coax/control lines in terms of snap on ferrite beads, RFI is intermittent.? Not sure why - could be the wind blows a few cables in the "right" direction or something else.? We really need to apply best practices for RFI reduction to the remote as a whole - I'm not sure we are taking a systematic approach to best engineering but we are trying.? I'll check the power settings on 10 to see what they are.? Generally, I have decreased the drive levels to the point that it is stable.

3.? I'll get on shortly and check the drive levels,

Thanks again for your reports - they are very much appreciated and helpful -- catch up later -- Don N4HH