[KX3] TX Power Issue

[Gary Hawkins]

I'm seeing a odd problem working digital today with my KX3. Sometimes
when I go into transmit (power set at 5W) JT65_HF, my Signalink shows
PTT active (red light) , the KX3 shows PTT active (red light) but no
power is being radiated.  Antenna (dipole) has a near perfect match to
the KX3.  Power still shows set to 5W on KX3. Problem remains if I
switch from the antenna to a dummy load.  Osc and PA temp at 36 and 30C
- PSU stable at 13.4V.  When I try to transmit is DATA A mode (tune)
power seems to try to ramp up and then immediately falls away.  Radio
seems to transmit fine in FM mode.  What am I missing please?
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[James Bennett]

Gary - are you sure you have enough audio drive coming from the SLUSB? Also - I had a similar issue with my K3 and an external sound card - a Tascam US-125M. My USB audio MIDI setting was at 48,000 Hz, 16 bit, like the manual said to have it at. However, I could not get transmitted RF. When I set that USB audio Codec thing in the MIDI control to 44,100 16 bit, it worked fine.

Have you tried any other software, like FLDIGI, to see if that works?

Jim / W6JHB

> On   Sunday, Jul 12, 2015, at  Sunday, 5:39 PM, Gary Hawkins <[hidden email]> wrote:
>
> I'm seeing a odd problem working digital today with my KX3. Sometimes when I go into transmit (power set at 5W) JT65_HF, my Signalink shows PTT active (red light) , the KX3 shows PTT active (red light) but no power is being radiated.  Antenna (dipole) has a near perfect match to the KX3.  Power still shows set to 5W on KX3. Problem remains if I switch from the antenna to a dummy load.  Osc and PA temp at 36 and 30C - PSU stable at 13.4V.  When I try to transmit is DATA A mode (tune) power seems to try to ramp up and then immediately falls away.  Radio seems to transmit fine in FM mode.  What am I missing please?
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