In normal operation you cannot use TUNE/DISPLAY to monitor the power
output and SWR.
Yes, those values are the power and SWR as measured by the KPA100 wattmeter.
Given your readings along with the HI CUR messages, I believe there is a
problem with the KPA100 wattmeter.
To test that theory, connect an external wattmeter to the KPA100 and a
dummy load. Set the power to 50 watts (or 5 watts if powering only the
base K2).
Then do a TUNE. Do you have power control? Or does the power output go
to maximum (greater than 15 watts if only the base K2 is powered, or
greater than 120 watts if the KPA100 is powered.
If there is no proper power control, then the wattmeter in the KPA100 is
damaged. The most common cause is that KPA100 diodes D16 and D17 have
been damaged. If changing them does not cure the problem, then there
are other components that could be the problem.
Let us know what the results of your testing may be and we can help further.
73,
Don W3FPR
On 11/9/2017 6:08 PM, TI2/NA7U wrote:
I see that the small aux board must be removed as there is a "null" pin in
the plug and cable, so went ahead and did that and hooked up the KPA100 with
its RF out to the meter to the dummy load.
When I hold TUNE/DISPLAY, I get a display that looks like <x.y> <x.y - z>
with values when power is turned all the way down: 0.1 1.2-1 and all the way
up 4 2.1-1 Is that pwr and swr?
If I key down the display reverts to frequency immediately, so seems I can't
use TUNE/DISPLAY to monitor the power setting or key down output.
As I turn the power up or down I get HiCur almost constantly until I let go
of the power button. The behavior of the knob is not smooth, jumps a few to
several watts sometimes. Not sure if that's a dirty pot or a control board
problem.
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