[Elecraft] K3 and WSPR rig stays in TX mod

[Rick Bates]

On one of the programs I run (don't remember which one) I set the command to
tell the K3 TWICE to go back to receive.  That program either doesn't
listen/talk well, or the timing is often off on serial commands.

Rick wa6nnhc/kl

-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Tony Estep
Sent: Wednesday, September 19, 2012 2:27 PM
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] K3 and WSPR rig stays in TX mod

On Wed, Sep 19, 2012 at 5:26 AM, Mike Weir <ve3wdm at hotmail.com> wrote:

> ...an Elecraft K3 and it seems to be stuck in TX and will not switch back
> to receive....

============
One way this can happen is if RF is getting into the computer and hosing
the serial port driver. This can happen even with a couple of watts from a
WSPR transmission. The fact that WSPR transmissions go on for 2 minutes can
defeat the operating system's attempts to reset the port buffer. If that's
it, the remedy is the same as for other RFI problems: a good single-point
ground setup and some ferrites.

Tony KT0NY


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