[Elecraft] FW: K3: CW in SSB mode broken?

[Don Wilhelm]

Lance,

It would be wise IMHO, for those using CW in SSB (or any other VHF/UHF 
gear) and also having a sequencer, to use the TX INH input on the ACC 
jack to inhibit transmit rather than asserting PTT at the end of the 
sequence.

Yes, the K3 works a little differently than many other transceivers, but 
the TX Inhibit function was well thought out explicitly for use with a 
VHF/UHF sequencer.

You will likely have to add a pullup resistor to +5 volts the TX INH 
line, but that should be an easy task, especially if a source of +5 
volts is available in the sequencer logic.

73,
Don W3FPR

On 2/1/2012 4:48 PM, Joe Subich, W4TV wrote:
> On 2/1/2012 2:23 PM, W7GJ, Lance wrote:
>> One thing that disappointed me is that this very useful cross-mode
>> feature (at least on 6m, where I do most of my operating), is
>> available only if you are running VOX mode.
>>
>> I am not sure why it has been excluded when you run with a footswitch
>> or sequencer to trigger the PTT line.
> The answer is quite simple, the PTT line engages transmit in the mode
> set by the "mode switch".  In order to switch modes, only the CW input
> (straight key or paddles) can be activated.  Given the changes needed
> in synthesizer/VCO settings, etc. between SSB and CW, I doubt that it
> would be possible to change modes (SSB to CW) once the K3 is already
> in transmit.
>