Hi, Don and all the list
Lasr Sunday, I was page 53 of the KPA100 manual, with every steps OK all the
way up to securing the shield and closing the box!
I had a very nice output, the KPA100 being direct with the K2 or with the
remote EC2 case, Once the shield in place and verified for bad contact and
so on, the next power up was a disaster.
I did not switch to transmit!!!
The resistors R21, R33 where burned out, RFC also, and after excanges with
Don WFPR, diode D12 and D14 where also found in short. R22 and R13 where
very hot,
and the curent on the K2 display was about 1.6 A.
So all off and after replacement and checking i'm at the following stage :
with only the KIO2 connection or direct connection the curent flow from
12CTRL is around 1 A on the K2.
Without PA power, only the KIO2 connection I do not get the NO PA PS
information when turning on the K2. R13 is still very hot and R21 is hoter
than normal. Pin #13 of U shold be at +4.9 V and insteed is at 0.1 V, as PIN
#14. The 125 V is OK on R11. If I plug on the PA PS, I can not turn off the
K2, his supply being done via 12CTRL line, either through the KIO2 or direct
connection to J4. If I try to transmit even at 11 w level, I get a black
cloud of smoke with R21 and R13 going "blam"
I'm lost, Don , I changed the cap for .22µF and it's OK.
Hoping for help from anybody
Regards F5UL Bob
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