[Elecraft] P3TXMON PEP vs K3S/KPA500 PWR?

[Bob McGraw K4TAX]

Bret:

Check to see that Data A mode is not showing REV.  If so, just press and 
hold the ALT button unit the REV is no longer displayed above the DATA 
label on the display.

As to SPLIT, that is to assure your transmitted tones are between ~1500 
Hz and ~1999 Hz thus any distortion products are outside of the transmit 
SSB filter and thus attenuated by the filter.   Thus if you are working 
a stations which is at 450 Hz on the waterfall, the software will shift 
the VFO such that the correct tone is transmitted to the receiving 
station.   All of this is done  by the software and the radio under CAT 
control.

With the WSJT-X setup, F2 menu, under the GENERAL tab and in the 
Behavior box,  the VHF/UHF box is not checked.

I did tests with my K3S set at 50 watts.  Then transmitted data at 300 
Hz, 1200 Hz, 1800 Hz and 2100 Hz.  The power output varied between 50 
and 55 watts as read on an external power meter, and the K3S power 
bargraph always indicated 50 watts.

If your settings and tones from WSJT-X are keeping the ALC bargarph 
between 4 and 5 bars then the power output from the K3S should be the 
value as set by the PWR control on the radio. Remember, unlike other 
radios, the K3S ALC bargraph shows audio level for the first 4  bars.  
The actual ALC does not begin until after the 5th bar.   Once set, do 
not change the PWR slider on the right side of the WSJT-X panel.   The 
actual transmit power is to be controlled only by the PWR control on the 
radio.

In my analysis, if your K3S output meter shows constant power and your 
KPA500 LED power indication is constant, then the issue lies with the 
P3TX MON.

73

Bob, K4TAX



On 6/17/2018 7:08 PM, MaverickNH wrote:
> Hi Don, I checked and my K3S is set in DATA A mode. I'm running SPLIT as
> well. The WSJT-X cites "advantages" but I'm not too clear on what those are!
>
> Bret/N4SRN
>
>
>
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