[Elecraft] K3 NR and KIO3B INTERFACE

[Peter Pellack]

  Last year we upgraded one of the K3's with the installation of the KIO3B interface kit. Shortly after we noticed that the NR sounded different. Like an "echo", even on the least aggressive setting. The NR performance appeared to have significantly suffered. Coincidence with the KIO3B installation ? We put the K3 on the shelf and used the backup K3 w/o the upgraded IO board.  Two months ago we upgraded the backup K3 with the KIO3B interface. Guess what, the same issue,the NR reduction has suffered the same symptoms as the 1st K3 ! What is going on here ? Tnx,73,Peter,HS0ZKX