[Elecraft] K3 Bootup sequence?

[Gary Bartlett]

The selection to which Fred refers was added by Wayne to the K3 menu at my
request on the grounds that, as originally designed, the K3 could start
transmitting at full power to the surprise of someone who innocently turned
a computer ON while it was attached to a K3 and that, to me, was a safety
issue.  My suggestion was based on my first use of K3 #95 at a Field Day
where that exact situation occurred.  Fortunately no test equipment was
fried nor did the radio transmit into an un-terminated RF output or cause
difficulties to the folks who were connecting the antenna at that point in
time.  Maybe it's my aerospace background but to me, a transmitter should
not transmit unless one specifically and consciously and knowledgeably
commands it to transmit by making some sort of enabling selection on the
transmitter :)

I always smile a little when I hear the distinct sequence of K3 keying tones
while tuning around on HF.  Another K3 is on the air!

	73,
	Gary VE1RGB

-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Cady, Fred
Sent: June-25-13 12:39 PM
To: 'Elecraft Reflector'
Subject: Re: [Elecraft] K3 Bootup sequence?

The other thing you can do is to go into the CW WGHT menu, tap the 4 key and
select VOX AUTOOFF. This turns VOX off when you turn the radio off and so
the PC won't key the radio while it (the PC) is booting up. You have to push
VOX to turn it back on, which is a bit of a pain, but I put a message in the
banner message telling me to do this. This only works if you turn the K3 off
and then back on before booting up the PC.
Cheers and 73,
Fred


Fred Cady
www.ke7x.com
fcady at ieee dot org

> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net [mailto:elecraft- 
> bounces at mailman.qth.net] On Behalf Of Don Wilhelm
> Sent: Tuesday, June 25, 2013 9:28 AM
> To: F5vjc
> Cc: Elecraft Reflector
> Subject: Re: [Elecraft] K3 Bootup sequence?
>
> If you are using DTR and/or RTS for PTT or keying, that will happen as 
> the OS tests the serial ports.
> If you do not need that keying, turn it off in the K3 menu.
> If you do need it, I would suggest putting a DB-9 A/B switch in the 
> serial line.  Turn it to break the connection to the K3 during the PC 
> bootup cycle.
>
> 73,
> Don W3FPR
>
> On 6/25/2013 11:16 AM, F5vjc wrote:
> > When booting up my PC connected to the K3 it keys the TX several
> times
> > during the bootup sequence, I imagine when initialising the various 
> > comports. I need to power up the K3 first before PC boot as I have
> added LP
> > Bridge to my PC auto start program list and it wants to see the K3 
> > to enable the connect port.
> >
> > Is there a way to auto inhibit TX keying during PC bootup ( eg.
> placing the
> > TX into TEST mode)?
> >
> > I believe there must be a way but can't find it as yet.
> >
> > Thanks, 73 F5VJC
> >
>
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