I had asked the list for some help with the KPA100 that I had some trouble
with. I added the 160 module and was getting no power out. After messing
about with it, I finally noticed that I was not getting any receive noise on
160 connected to the KPA100 antenna. I pulled the KPA 100 and all worked FB
on the base K2. Receive noise and full QRP power out. Finally after slapping
my head about no receive on 160, I started looking at the band pass section
on the KPA100. I wanted to know whether the relays were engaging or if
something was shorted or open. I took my mechanics stethoscope and started
listening to the relays. All of the relays in the band pass section would
click audibly when that band was selected EXCEPT the 160 relays. Looking at
the schematic, it is pin 18 that goes to ground to energize the relays for
160. All of the other outputs were going to ground when those bands were
selected except the 160 relay output on pin 18. It stayed at 12V. I checked
the input on pin 1 U2 and it was not going to 5 volts like the rest of the
inputs. Moving over to the MCU pin 26, it was going to 5 volts and should
have been turning the output of U2 pin 18 on. I pulled the board and DOH!!
found that I had not soldered pin 1 of U2. Now all is working. Just wanted
to let you know as a trouble shooting tip that the RB outs of the MCU U1
need to go to 5 volts when you select that band, this puts 5 volts on the
input of U2. This caused the output to go to ground and turn on and latch
the relay.
Just thought I would pass that along for what it is worth. I am also using a
logging program called XMlog. Not that it is my favorite, it is just what I
use. I set the rig control to Kenwood. On the packet spot map, you can click
on a spot and this will cause the rig to go to that freq and mode. The
Kenwood setting works just fine with the K2 for changing bands, modes and
freqs. I cannot attest to other functions, but this works fine for me for
now. At least I know the K2IO is working on the KPA100. Now all that is left
is the audio filter/clock option and this rig will be ready for it's owner.
I also got the noise blanker installed and working today as well. I am sure
that he will be happy, if I ever let him have it! ;-)
Jess AE0CW
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