K3 Transmit Timeout for Remote Operation

[Dana Roode]

I've been using my K3 remote for many years.  I'm using VNC to a
controlling PC to operate the K3 and a variety of other equipment.  I have
relied on an imperfect external solution to protect against runaway
transmission.

I've seen postings to the list over the years about a timeout that
tracks when the PTT is on and triggers TX Inhibit if its on more than a
defined length of time, resetting when PTT goes off.  Does anyone have a
circuit for this to share or other suggestions?  I imagine a 555 timer or
the like with the right interfaces to the K3.  I understand that some of
the Remote Radio interfaces have this built in, but I'm not using them.

  Dana
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[Dana Roode]

I didn't get any response to my query below, but I have a solution in place
finally.  I'm no electronics wiz but I found some circuits and constructed
something based on a 555 that works nicely.  If any else is interested in
this, let me know.    Dana

On Fri, Aug 7, 2020 at 2:01 PM Dana Roode K6NR <[hidden email]> wrote:

> I've been using my K3 remote for many years.  I'm using VNC to a
> controlling PC to operate the K3 and a variety of other equipment.  I have
> relied on an imperfect external solution to protect against runaway
> transmission.
>
> I've seen postings to the list over the years about a timeout that
> tracks when the PTT is on and triggers TX Inhibit if its on more than a
> defined length of time, resetting when PTT goes off.  Does anyone have a
> circuit for this to share or other suggestions?  I imagine a 555 timer or
> the like with the right interfaces to the K3.  I understand that some of
> the Remote Radio interfaces have this built in, but I'm not using them.
>
>   Dana
>
>

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