Pete,
What Wayne indicated applies only to the K3 and the K144XV transverter.
It is not applicable to the XV144 being driven by the K2.
The K2 has no provision to turn off the TX ALC.
But I would add that you might monitor the K2 output with a QRP
wattmeter to determine if the K2 is reducing power or the XV144.
A measurement of the RF voltage from the K2 will determine that. For
that measurement, you must use an oscilloscope with a 10X probe.
Alternately, an oscilloscope at the XV144 28MHz input to the mixer will
tell you whether the 28MHz energy is steady or sagging over your
transmit time.
73,
Don w3FPR
On 3/19/2018 8:11 PM, Wayne Burdick wrote:
Pete,
After establishing the desired power output level, try turning off ALC (see
owner’s manual; CONFIG:TX ALC).
If turning the ALC off eliminates power fade, then it’s a firmware problem. If
this doesn’t help, then something is heating up, possibly a cold solder joint
or component.
Wayne
N6KR
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