[Elecraft] [KX3] JT65 and JT9 possible TX issues

[steve]

I have used KX3 for JT65 at 0.5 watts.
1. you need ALC = 4-5 bars.  I think it in the manual about digital modes.
I use WSJTX directly.  Audio into an external USB sound "card" (I don't 
like transmitting system sounds...)
I use USB control cable (same as used with KX3 utility) with rig control 
from WSJTX.

73, steve WB3LGC

On 07-May-15 1:11 PM, Gary Hawkins wrote:
> I've successfully setup my KX3 with HRD 5.4.28 and WSJT-X, using a 
> Signalink to interface audio to computer (my first attempt at digital 
> operation).
>
> Everything seems to work well on receive, and I can hear and decode a 
> good number of stations in both modes (WSJT-X will do simultaneous 
> decode of both JT65 and JT9 with BW set to 4kHz).
>
> While TX is functioning (running 3W, ALC=0, have not done temp 
> compensation but have VE7FMN heatsink), reception by other parties has 
> been difficult.  Using JT65-HF I've had a couple of incomplete QSOs - 
> the receiving station has been able to decode and respond at least 
> initially.  Using JT9 the one station I contacted reported unable to 
> decode, after trying on several different occasions/times.
>
> So my questions are what are the capabilities of the KX3 in this 
> configuration for these modes, i.e. running at 3W and with heatsink 
> fitted?  Should I expect the KX3 to be able to function in both modes 
> TX without issue, particularly relating to internal heat build-up, 
> freq stability)?  Any thoughts on likely issue - pls ask for more 
> details of setup if required?
>
> 73's Gary K6YOA
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