[Elecraft] K3 is not responding

[Guy Olinger, K2AV]

I have had an off and on problem with a USB to serial dongle, and finally 
discovered the following pattern:

Using Windows XP, all current windows upgrades maintained.

Using the USB dongle purchased from Elecraft.  The Elecraft recommended 
drivers from the mfr. have been installed.

K3 is on.

K3 is reachable via the USB dongle on COM3  by other programs, N1MM, etc on 
COM3

ANY firmware update arrives, makes no difference.

Start up 1.2.16 K3 utility.  Finds K3 right off, no problems.

Install firmware no problems.

**IF** I terminate the K3 1.2.16 utility and after that power off the K3 I 
have no problems.  COM3 is still around to play with as desired.

**IF** I do the recommended K3 power off BEFORE I terminate the K3 1.2.16 
utility, this locks up the utility. It cannot be terminated with the "X" 
button in the upper right of the window.

Powering the K3 back on does not restore the utility to operation. The only 
way to terminate the utility is with Windows Task Manager.

Further, regardless of whether K3 is back on COM3 has been rendered 
unreachable and the only way to restore it to communications is with a 
reboot.

This particular sequence is the only one which creates this lockup.

Turning off the K3 with N1MM running does not cause this issue, N1MM 
complains about lost communications until I turn the K3 back on and it's 
happy again.  This would seem to be an issue with the utility only.

Perhaps this has involvement with some of the reported issues?

73, Guy.


----- Original Message ----- 
From: "Tim" <k5oi at arrl.net>
To: "Elecraft Reflector" <elecraft at mailman.qth.net>
Sent: Saturday, April 11, 2009 11:33 PM
Subject: [Elecraft] K3 is not responding


> Without warning and having made no changes my K3-10, using utility 1.2.16,
> MCU 2.78 and DSP 1.98, is now giving me "K3 is not responding".  I'm using
> the USB/SERIAL adapter from Elecraft.  The USB ports are working on the
> computer.  Any ideas of what I can check?  Thanks.
>
> Tim K5OI
> K3 #430.
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