Hi Don,
Ah very good point this rules out the low pass filter on the KPA 100, as
low power is OK. I only have this problem on 160, as 80 to 10 are fine
Th High current only show up on 160 M, the display on the K2 reads the
same on the external watt meter Bird through line. SO! symptoms below
are:
1 Power on display matches Watt meter from 160 to 10 ( all be it
160 is 60 Watts Max)
2 Power from 80 to 10 max 111 Watts on display and meter, no
high current warning
3, Power after 60 watts on 160 I get high current warning
4, I did not disturbed R 26 it was covered by metal plate when
I removed the KPA100 to make way for the DSP, and the setting of
R26 would also affect other bands
The Bird meter was calibrated this year with all its elements,
also I have more than one Watt meter, all say the same low power
on 160 and high current
Something must have been disturbed somewhere!! I guess?
73's
Andrew
On Sun, 2008-10-26 at 10:43 -0400, Don Wilhelm wrote:
> Andrew,
>
> If the KPA100 low pass filter were a problem it would misbehave at both
> the low and high power ranges because it is always in the circuit with
> the KPA100 connected.
>
> A "Hi Cur" message means the *base K2* is drawing current in excess of
> the CAL CUR setting, and the power will be reduced to control the current.
>
> If the HI CUR message only shows up when driving the KPA100, then I
> would look for a problem in the input of the KPA100, or mis-calibration
> of the wattmeter in the KPA100. If you bumped the setting for R26 while
> working on the KPA100, that in itself may be sufficient to explain the
> HI CUR indication. Did you measure the actual power output with an
> external wattmeter or are you depending on the K2 display? If the
> internal wattmeter is not properly calibrated, the actual power output
> can be much greater than indicated by the K2.
>
> 73,
> Don W3FPR
>
>
> Andrew Lenton wrote:
> > Hi Don,
> >
> > Thanks for that, Putting aside the K2's low power on 160, which no doubt has
> > a component error value somewhere, the KPA 100 has been working at 111 Watts
> > for two years until I disturbed the PA last week to make way for the DSP
> > board. So something has happened to the KPA100. I only get a high current
> > warning when the KPA100 is in use. 80 to 10 Metres is fine 11 watts no
> > warnings! I think something has happened to the high power low pass filter,
> > any thoughts?
> >
> > 73
> >
> > Andrew G8UUG
> >
> >
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