[Elecraft] K3 not communicating with PC

[Jon K Hellan]

Roger Dallimore wrote:
> Many thanks for all suggestions privately and to this list.
> 
> I can confirm that;
> 
> Ports have been checked with K3 utility
> Checked correct port in device manager on PC
> Did not stop after upgrading software
> I am using KUSB with latest drivers since arrival of K3 #191
> K3 is set at 38400 baud
> 
> I'm going to examine the transistor on the IO board. Apparently the 
> plastic transistors can degrade over time on older K3's and the voltage 
> drops under load to the RS232.  Thanks to K1WHS for this suggestion.

Did you check the voltage to the K3? Low voltage from a battery once caused a PC communications
problem for me.

Jon LA4RT