"Safe" mode also works with a standard serial port and an unmodified K3.
73,
... Joe, W4TV
On 3/18/2018 12:41 PM, Don Wilhelm wrote:
For those who have a K3S or a K3 that has been upgraded with the KIO3B
option, the "fix" for the problem of the computer 'wiggling' the DTR and
RTS lines when the computer is turned on is to download MCU 5.33 or higher.
There is a SAFE MODE to prevent just that - read the Firmware Release
Notes for MCU 5.33.
73,
Don W3FPR
On 3/18/2018 11:54 AM, Rick WA6NHC wrote:
With the homebrew circuit (opto-isolator X 3, one each for PTT,
Data/FSK and CW) I'm using, I chose to take the CW keying directly to
the key port of the K3 (in parallel with the hand key, plus there are
paddles). That allows me to leave Config: PTT Off-Off.
This has worked really well, except the OS wake up still keys the
transmitter during the discovery phase of boot up. That apparently
can't be avoided (so I put the TX in test mode, if I'm in the shack).
I use real serial ports as USB has more problems in QRO RF.
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