[Elecraft] K3 with Kenwood MC-60

[Jeff KB2M]

  I picked up a used MC-60 mic at Dayton. When I try to use it with my K3,
as soon as I connect it via the 8-pin foster on the front  the frequency
starts to scan like I'm holding down the up button on the mic. Thinking that
there was a problem with the mic I tested it with a Kenwood TS2000 and it
works perfectly. You push the up button and it scans up, etc. Now what
puzzles me is that I used to own another MC-60(that I sold) and it worked
correctly with my same K3. I'm wondering what could be causing this before I
start to take everything apart. Anyone else run into this, does anyone have
any ideas?

73 Jeff kb2m