[Elecraft] firmware upgrade snafoo

[Bruce Beford]

Sam,
It sounds like something is interfering with the communications between K3
Utility and the K3 itself.
Are you using a true RS232 port on the PC, or a USB-RS232 adapter? If there
is a USB adapter inline, are you then going through a USB Hub? If a USB
adapter, are you using the latest drivers for your adapter? 

There are many of us using USB to RS232 convertors with no trouble at all.
Ever. Myself included. There are others who have had intermittent problems
like you are describing. Often, updating drivers for the USB adapter or
removing a hub from the line, or using a different USB adapter have cleared
this up completely. Also make sure that when you are running K3 utility,
that you do not have any other program running that may talk to that port
(like HRD, etc)

GL,
Bruce N1RX