Bob,
Review the soldering on the KSB2 board to see if you produced any solder
splashes, and look carefully at areas outside the filter too. The fact is
that if the filter works on receive, it should work on transmit too. You
should not have to upgrade the KSB2 firmware to have it work.
You should also think about the possibility that you had an 'ESD attack'
while you had the KSB2 removed from the K2. That could zap solid state
components easily, particularly the firmware chip.
73,
Don W3FPR
> -----Original Message-----
>
> I have been upgrading the captioned K2 for a friend.
> I installed new matched xtals in the entire rig as well as the
> KSB2 module.
> I replaced U6 the MCU on the Control board and U1 the IOC on the
> RF Board.
> I did not upgrade U1, the IC Microcontroller on the KSB2 Board.
> The KSB2 now is not working properly on transmit, I can just barely hear
> the transmitted signal on my monitor receiver and there is no segment
> lit up on the bar graph.
> The received signals are normal.
> Is it necessary to upgrade U1, the Microcontroller on the KSB2 Board too?
> This is not clear to me. Any help would be much appreciated.
>
> 73, Bob VE3XM
> K2/100 S/N 4031
> K2 S/N 4575
>
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