[Elecraft] K3: 5W TX Gain Cal Failure ...

[Ken Dailey]

I'm just building a new K3, and have come to the point of performing the TX Gain Calibration.  I have the K3 hooked up to the iMac via a KUSB, and the two are talking to each other fine.  However when I run the 5W gain cal, I get this failure message :

Elecraft K3 Utility for OS X Version 1.12.3.28B
OS X Version 10.7.4 (Lion)
K3 MCU version 04.51. RS-232 speed 9600 bps.
Starting 5 watt calibration.
Calibrating at 1.900 MHz
IsSamplingComplete: Unexpected response 'DS@@@@1∞>IÄÄ;' to 'DS;'. State 220
Calibration power settled at 'ERR TXF;'
5 watt calibration failed.
Elapsed time: 6.6 secs

Anyone have any ideas what the problem is?

Thanks,

Ken, G0RVH

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Ken Dailey