Ron,
How much power is actually being produced? Measure with an external
wattmeter, then look at the bargraph display and see how many bars are
indicated. If there is a lot of power being produced (120 watts or
greater) and the bargraph does not indicate any RF power, you should
look at the wattmeter section of the KPA100 - particularly T4.
If the actual power output is not being reported to the base K2
microprocessor, the base K2 will increase drive in an effort to produce
more power (because it thinks that is no power output).
The solution to that situation is to find the fault in the wattmeter of
the KPA100.
73,
Don W3FPR
Ron Hahn (EI2JP) wrote:
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Colleagues,
I've just finished a KPA100 and am in the process of doing the final
checkout.
I've made it past the bias adjustment stage and the power supply test
stages.
Below 11 watts output (PA switched out) everything seems to work OK.
Setting the power output to 20 watts and pressing tune results in NO
power output and a current draw of approx. 26 amps. Not good.
I checked recent posts regarding this problem but none seem to have the
high current problem associated with no KPA output power.
Suggestions?
Thanks a mil,
Ron
- --
- -=-------------------------o---------------------------=-
Ron Hahn, EI2JP | Grid Square: IO62TG
Rose Hill | Fists: 10883
Rosslare Strand | QRP-ARCI: 12584
County Wexford, IRELAND | K2: 4922
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