Pete,

Fine that you are using an FTDI USB to serial adapter - but what is the connection from the DE-9 conncetor on that adapter to the KX2. If it is the KXSERa cable, then it should work fine, but if you have wired your own DE-9 to 3.5mm cable, then check it to make certain it has the correct connections and has continuity on all 3 of the used conductors.

In other words, if you have made your own Serial to KX2 cable, check it first.
Set the KX2 RS-232 to 38400 and use KX2 Utility to attempt to connect.

73,
Don W3FPR

On 8/3/2016 5:18 PM, Pete Jones wrote:
I am using an FTDI cable (not Elecraft KXUSB). Windows 10 recognises it and the FTDI driver is installed. The KX2 utility app sees it as Port COM4 but fails to connect at any speed.

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