My connection K3 -> P3 -> USB III -> PC works fine with Microham driver 
installed.
With the Microham driver GUI, you need to configure virtual COM port to 
communication PC software such as K3 Utility and others to K3.

73 de JH3SIF, Keith

> 2018/02/17 4:23、Greg Best <gbconsultin...@gmail.com>のメール:
> 
> I am still trying to get a K3 talking.  I have a connection through a
> Microham USB III Interface box that connects the K3 RS232 port to my PC
> running Win 7 64 Pro. The path is from the K3 to the Microham III USB
> interface, then there is a straight USB connection from the Microham to the
> PC.  I have downloaded the K3 Utility and tried to see if it will establish
> connection with the PC but it will not.  COM port 1 is used.  The K3 setting
> is currently at 38400 baud  but I also tried setting the K3 baud rate at
> 4800 and doing a power on/off  but with the same results.   I see the K3
> utility screen on the PC step through the various baud rates but it will not
> sync up to the K3. The PC recognizes the Microham USB interface when looking
> at the Win 7 Device Manager but it indicates there is no device driver. I
> don¹t always trust what the PC says though.  Can someone point me to a
> device driver I can download and install. My K3 FW is Rev 5.38.
> 
> 73¹s
> Greg
> 
> 
> Greg Best P.E. 
> 16100 Outlook Avenue
> Stilwell, KS 66085
> 816-792-2913 
> 
> 
> 
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