[Elecraft] Mac utility with K3S Puts K3S in TX mode!

[Guy Olinger K2AV]

Make sure that the K3 CONFIG:PTT-KEY is set to OFF-OFF. This is to
make sure that miscellaneous, not on purpose, states of DTR and RTS in
the serial connection are not controlling the transmit and keying
state of the K3.

I'm not qualified to discuss how to turn off DTR and RTS on a Mac from
the operating system. Better to set the K3 to not respond to those.

Commonly, if used, DTR and RTS are controlled by applications running
on the computer using a serial port to talk to the K3, but the state
of those absent a program controlling them is unclear. N1MM logger and
logger plus have a config setting to set up DTR and RTS for use or to
force them to a given state.

If you DO at some point decide to use DTR and RST for keying and/or
PTT, you will have to completely understand and control those lines
coming from the computer, be they Windows or Apple.

Otherwise they should both be turned off in the K3 config.

DTR and RTS are part of any serial connection, so this would be true
as well using the new USB connection for K3/K3S. The DTR and RTS
information from the computer still must either be managed or turned
off in the config.

The K3 manual version D10 has a discussion of these pinouts on page 18.

73, Guy.

On Fri, Jul 24, 2015 at 10:17 AM, Bill Conkling <nr4c at widomaker.com> wrote:
>
> I have been using my K3S with Win 7 so far and decided to give the Mac a chance to play.
>
> Downloaded the latest utility for the Mac (Latest OSX, Macbook Pro I7 w/16gigs) and convinced the Mac that I really did want to open this file.  I selected the USB com port and my radio immediately went into TX mode and would not stop.  I shut down the radio.  Stated K3S again and it was still in TX.  I unplugged the USB, radio still in transmit. Powered off rdio, power on again, still in TX.
>
> Now I connected the rdio to my Win 7 machine, and all is well again.
>
> Now, plug USB back into the Mac, re-read paragraph two above.
>
> I am a new user to the Mac and don’t know a lot about the comport details so this is probably something silly, but I need some assistance.  Help!
>
> Part 2)
>
> Just to sav e time, I hooked up the K3 to Mac with KUSB cable, and sure enough, it also goes to TX when connected to the Mac.  So it;s not the radio, must be a setting in the computer, a hiccup in the utility.
>
>
>
> FWIW:  I have moved the modified KBPF3 and filters from my old K3 to the K3s yesterday and that is working just fine.
>
> …bill c   nr4c
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