Finished KPA100; problem HiCur and Hirefl

[Koert Wilmink]

Dear all,
I just finished my KPA100. I do have the following problem with the
first steps connecting the KPA100 to my K2 #05618.
I've connected the ribbon cable, speaker and RF connector to my K2. I've
got audio and I also receive stations when I connect my antenna.
With my dummy load and after setting power to 5Watts on 40M I see the 5
watts and the SWR for 1 second in the LCD screen and then the HiCur
(High current) appears on the LCD.On 20m  bands I only see the PWR in
the LCD screen without the SWR for 1 second and than I see HiRefl. On
10M I do see the pwr and the SWR! The latter I only get 2.1 watts when
set to 5 watts.
Please can somebody tell me where to start? I did check the connections
and this seems to be ok. There is no pwr to the KPA100 so everything is
bypassed, except the bandfilters?
help is very much appreciated!.

--
73, Koert PA1KW
-----------------
"HAMRADIO - when everything else fails!"

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[Don Wilhelm-3]

Koert,

Make a quick continuity check first - from the center conductor of the
J1 coax to the center of the SO239 antenna jack.  There should be
continuity on all bands (the ribbon cable should be connected for this
test).

Next, be certain R26 and R27 are set at their midpoint.  If the problem
persists, check T4 very carefully for correct lead positioning and
properly tinned and soldered leads.  Be certain the red wire goes
through the center of T4 and the bare wire from the SO239 center
connects to T4-6.

73,
Don W3FPR

Koert Wilmink wrote:

> Dear all,
> I just finished my KPA100. I do have the following problem with the
> first steps connecting the KPA100 to my K2 #05618.
> I've connected the ribbon cable, speaker and RF connector to my K2. I've
> got audio and I also receive stations when I connect my antenna.
> With my dummy load and after setting power to 5Watts on 40M I see the 5
> watts and the SWR for 1 second in the LCD screen and then the HiCur
> (High current) appears on the LCD.On 20m  bands I only see the PWR in
> the LCD screen without the SWR for 1 second and than I see HiRefl. On
> 10M I do see the pwr and the SWR! The latter I only get 2.1 watts when
> set to 5 watts.
> Please can somebody tell me where to start? I did check the connections
> and this seems to be ok. There is no pwr to the KPA100 so everything is
> bypassed, except the bandfilters?
> help is very much appreciated!.
>

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[Koert Wilmink]

Don,
Do you know what the resistance is between ground and  SO239 antenna
jack center? With power on the K2 it is zero ohms with J1 connected to
the K2. Without J1 connected the resistance is infinite.
Thanks.
Regards,
Koert

73, Koert PA1KW
-----------------
"HAMRADIO - when everything else fails!"



Don Wilhelm wrote:

> Koert,
>
> Make a quick continuity check first - from the center conductor of the
> J1 coax to the center of the SO239 antenna jack.  There should be
> continuity on all bands (the ribbon cable should be connected for this
> test).
>
> Next, be certain R26 and R27 are set at their midpoint.  If the
> problem persists, check T4 very carefully for correct lead positioning
> and properly tinned and soldered leads.  Be certain the red wire goes
> through the center of T4 and the bare wire from the SO239 center
> connects to T4-6.
>
> 73,
> Don W3FPR
>
> Koert Wilmink wrote:
>> Dear all,
>> I just finished my KPA100. I do have the following problem with the
>> first steps connecting the KPA100 to my K2 #05618.
>> I've connected the ribbon cable, speaker and RF connector to my K2.
>> I've got audio and I also receive stations when I connect my antenna.
>> With my dummy load and after setting power to 5Watts on 40M I see the
>> 5 watts and the SWR for 1 second in the LCD screen and then the HiCur
>> (High current) appears on the LCD.On 20m  bands I only see the PWR in
>> the LCD screen without the SWR for 1 second and than I see HiRefl. On
>> 10M I do see the pwr and the SWR! The latter I only get 2.1 watts
>> when set to 5 watts.
>> Please can somebody tell me where to start? I did check the
>> connections and this seems to be ok. There is no pwr to the KPA100 so
>> everything is bypassed, except the bandfilters?
>> help is very much appreciated!.
>>
>

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[Don Wilhelm-3]

Koert,

That is normal.  Everything at the base K2 Low Pass filter area shows as
a DC short to ground - it is not 'ground' for RF.

73,
Don W3FPR

Koert Wilmink wrote:

> Don,
> Do you know what the resistance is between ground and  SO239 antenna
> jack center? With power on the K2 it is zero ohms with J1 connected to
> the K2. Without J1 connected the resistance is infinite.
> Thanks.
> Regards,
> Koert
>
> 73, Koert PA1KW
> -----------------
> "HAMRADIO - when everything else fails!"

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[Koert Wilmink]

Dear all,

After a lot of checking and checking I still have this problem. I
removed T4 and did dubble check. I did replace the coax cable by a
teflon coax cable. I did set R26 and R27 to 43K. Sometimes when turning
C1 it is possible to set 1.0-1 but than it reduces the power to 0 watts.
After switching off and on again the display is saying Hi Curr again.
I'do not know any alternatives anymore. Please help!

73, Koert PA1KW
-----------------
"HAMRADIO - when everything else fails!"



Koert Wilmink wrote:

> Dear all,
> I just finished my KPA100. I do have the following problem with the
> first steps connecting the KPA100 to my K2 #05618.
> I've connected the ribbon cable, speaker and RF connector to my K2.
> I've got audio and I also receive stations when I connect my antenna.
> With my dummy load and after setting power to 5Watts on 40M I see the
> 5 watts and the SWR for 1 second in the LCD screen and then the HiCur
> (High current) appears on the LCD.On 20m  bands I only see the PWR in
> the LCD screen without the SWR for 1 second and than I see HiRefl. On
> 10M I do see the pwr and the SWR! The latter I only get 2.1 watts when
> set to 5 watts.
> Please can somebody tell me where to start? I did check the
> connections and this seems to be ok. There is no pwr to the KPA100 so
> everything is bypassed, except the bandfilters?
> help is very much appreciated!.
>

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