My MC-60 has bad RFI operating on 40 meters. I have done the usual jumpering of
pins 7 & 8 (PTT gnd and mic gnd) but did not help. It only shows up when I
touch a metal part on the mic. The best advice so far is to wear rubber
surgical gloves to operate on 40. OH I did try the ferrite on the coiled cord.
that did not help either.
What next?
Don N0DG

There was an article in QST within the past five years that
dealt with this problem and how to fix it - with cores and
caps at internal locations.

Bill Evans VE4UD
"N0DG" wrote in message
...
My MC-60 has bad RFI operating on 40 meters. I have done
the usual jumpering of
pins 7 & 8 (PTT gnd and mic gnd) but did not help. It
only shows up when I
touch a metal part on the mic. The best advice so far is
to wear rubber
surgical gloves to operate on 40. OH I did try the ferrite
on the coiled cord.
that did not help either.
What next?
Don N0DG

There was an article in QST within the past five years that
dealt with this problem and how to fix it - with cores and
caps at internal locations.

Bill Evans VE4UD
"N0DG" wrote in message
...
My MC-60 has bad RFI operating on 40 meters. I have done
the usual jumpering of
pins 7 & 8 (PTT gnd and mic gnd) but did not help. It
only shows up when I
touch a metal part on the mic. The best advice so far is
to wear rubber
surgical gloves to operate on 40. OH I did try the ferrite
on the coiled cord.
that did not help either.
What next?
Don N0DG