[Elecraft] K3: Added protection for RS-232 port

[K9ZTV]

  The RS-232 port on my K3 has been controlling both a Palstar AT-AUTO 
and a Quadra amp continually for over two years with zero problems.

Only time that line is disconnected is when I do K3 updates with the 
KUSB adapter cable or logging during Field Day and other events.

73,

Kent  K9ZTV



> On 7/19/2010 6:08 AM, Pete Smith wrote:
>>    Elecraft advised me always to disconnect any cable from the RS-232 port on my K3 when not
>> in use, from which I inferred fragility.