Dick,
Sorry, but that does not help a lot - the operation in TUNE that you
describe in normal. TUNE (with the KPA100) normally controls power at
20 watts. If you enter TUNE and then turn the power control, it will
try to produce the power that is set on the power control knob.
The gain of the power control loop is increased (over the base K2 gain)
when the KPA100 is present and the power control set for greater than 11
watts - so the fact that this problem does not show up at low power is a
not unusual. If the gain of your KPA100 is greater than the average,
you may notice this power control loop oscillation problem.
Try increasing RF Board R98 to see if the power control oscillation
settles down.
73,
Don W3FPR
Dick Grolleman wrote:
Hi gentelmen
More info
I have been testing my K2 on the power issue.
I have the following findings
It is stabel on low power. I set it to 5 watt, press tune and it is
stabel. turn the power up to 50 watt, and it goes from 42 to 50. stop
the tuning, press tune again and the power is 28 watts and going down
to 20. Turn it op to 50 again, and stop tuning. press tune again after
a few seconds and again is 28 watt and goes down to 20. turn it up
again, and it repeats again, so i keep increasing the power. but if it
is on 50 watt is is quit stabel. Then start transmiting, and the power
varies from 40 to 70watt.
never noticed this before as it is the first time I use the radio witn
an amp. But I does not matter if the amp is on or not. works fine on
100 watt
Maybe this helps.
many thanks 73 de Dick
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