[Elecraft] Strange behavior on K3 system when transmitting

[Don Wilhelm]

Jerry,

That is "just another data mode" to the K3.
First, you may be better off using DATA A submode rather than USB 
because the compression is automatically set to zero and the TX EQ is 
set flat.  That allows you to set your SSB compression and TX EQ as you 
wish for voice modes.

Like all other K3 DATA modes (driven by whatever applications), you must 
drive the audio as indicated in the K3 manual.  You should have 4 bars 
illuminated on the ALC meter with the 5ht bar flashing.

Set the computer soundcard speaker slider to about 75%, and plug the 
soundcard output into LINE IN on the back of the K3.
With the K3 set to DATA A mode, set the K3 MIC SEL to LINE.
You can do the following adjustments in TX TEST mode so you do not 
produce RF.
Then do a Transmit from the computer application and adjust the K3 MIC 
GAIN (now LINE IN gain) to produce 4 bars solid with the 5th bar 
flashing on the ALC meter.
Adjust the power level desired with the POWER knob.
Ignore the advice for other transceivers which tell you to set the power 
for maximum and use the audio level to control the power output - the K3 
is different, and the use of that "advice" will produce exactly the 
situation you describe.

73,
Don W3FPR

On 1/17/2017 7:56 PM, Jerry wrote:
> Hello,
>
>
>
> I am using my K3, KAT500 and KPA500 in an MARS environment and I am having
> this problem. We use the M110A data mode to transfer messages between
> stations  - sort of like FLdigi only the mode is not legal on amateur
> frequencies.
>
>
>
> When I use the M110A (Signalink is the interface and USB) I have noticed
> that the output in the KAT500 slowly builds up as the transmission
> continues. It is really noticeable when I have the amp engaged. The power
> output seems to start at some low level (no lights) to full output in about
> five seconds of continuous transmitting (SSB). I originally suspected that
> it might have something to do with the KAT500 functionality , but I don't
> think so now because the condition existed even when I put the tuner into
> bypass.
>
>
>
> Any ideas?
>
>
>
> Jerry, W1IE
>
>
>
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