[Elecraft] RFI using FSK and RF Grounding in RV

[Mark Cherry]

I would like to start off by saying, what a wonderful rig the K3 is,
having the time of my life!

Until recently, I have used AFSK up to 80 watts without issue.  I just
built a one transistor keying circuit for FSK using Writelog and it
works just fine up to 5 watts.  After that the keying of the rig is a
constant tone, rather than shifted.  The laptop continues sending
properly.  I have routed all control/audio interconnects off the left
side of the K3, under the table and back up to the laptop, staying as
far from the antenna cables as possible as well.  This 'fix' bought me
an extra 15 watts, now I am good to 20 watts!

I have determined (correctly I think) that it is an RFI issue, but
can't seem to beat it.  If I go back to AFSK, no problem.  I have
ferrite cores on every line from computer to rig, at both ends and the
laptop is grounded to the radio.  Any suggestions would be greatly
appreciated.

My big issue is RF ground for the rig in an RV.  I am currently setup
in my 5th wheel and do not have a great way to ground without running
a 30' wire back to the power pedestal and it's ground point!  Any
suggestions on this?

Thanks everyone for your time reading and maybe helping!

--
Mark - WT6P
Kingman, AZ
Brenda, AZ
wt6pmark at gmail.com