Hi, all.

Well, this evening, I made the ground connection that has been discussed as 
a way to solve the RFI problem with the MC60 mic, when used with the TS480. 
I screwed one end of a 14-gauge piece of wire to the base of the mic, and 
the other to the ground screw on the TS480 using spade lugs.

I did a test on 75 meters, which seemed to be the band where the problem had 
been most apparent, and it looks like I might have solved the problem.

However, the people I talked to said my audio needed more base, so I may 
still have to work with the TX equalization settings on the 480 to see which 
setting might sound best.  Right now, I have the TX equalization set to 
"off".

I did notice one interesting thing, though.

Even with the new ground connection, my audio gets much worse when I switch 
the pre-amp to "out".  If it is "in", I get good audio reports.  Wouldn't 
the "in" setting mean the pre-amp is in the circuit?  Why would my signal 
get worse with the pre-amp "out"?

Still learning here, obviously.

73 from Tom Behler:  KB8TYJ